BioMed Research International: Ophthalmology http://www.hindawi.com The latest articles from Hindawi Publishing Corporation © 2014 , Hindawi Publishing Corporation . All rights reserved. Profile of Microbial Keratitis after Corneal Collagen Cross-Linking Thu, 11 Sep 2014 06:35:59 +0000 http://www.hindawi.com/journals/bmri/2014/340509/ Purpose. To report the profile of microbial keratitis occurring after corneal collagen cross-linking (CXL) in keratoconus patients. Methods. A retrospective analysis of 2350 patients (1715 conventional CXL, 310 transepithelial CXL, and 325 accelerated CXL) over 7 years (from January 2007 to January 2014) of progressive keratoconus, who underwent CXL at a tertiary eye care centre, was performed. Clinical findings, treatment, and course of disease of four eyes that developed postprocedural moxifloxacin resistant Staphylococcus aureus (MXRSA) infectious keratitis are highlighted. Results. Four eyes that underwent CXL (0.0017%) had corneal infiltrates. All eyes that developed keratitis had conventional CXL. Corneal infiltrates were noted on the third postoperative day. Gram’s stain as well as culture reported MXRSA as the causative agent in all cases. Polymerase chain reaction (PCR) in each case was positive for eubacterial genome. All patients were treated with fortified antibiotic eye drops, following which keratitis resolved over a 6-week period with scarring. All these patients were on long-term preoperative oral/topical steroids for chronic disorders (chronic vernal keratoconjunctivitis, bronchial asthma, and chronic eczema). Conclusion. The incidence of infectious keratitis after CXL is a rare complication (0.0017%). MXRSA is a potential organism for causing post-CXL keratitis and should be identified early and treated aggressively with fortified antibiotics. Rohit Shetty, Luci Kaweri, Rudy M. M. A. Nuijts, Harsha Nagaraja, Vishal Arora, and Rajesh S. Kumar Copyright © 2014 Rohit Shetty et al. All rights reserved. Accelerated Corneal Collagen Cross-Linking in Pediatric Patients: Two-Year Follow-Up Results Thu, 11 Sep 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/894095/ Purpose. To evaluate the effectiveness and safety of accelerated corneal collagen cross-linking (ACXL) in patients below 14 years of age with progressive keratoconus. Materials and Methods. Thirty eyes of 18 patients with established progressive keratoconus underwent preoperative and postoperative visual acuity assessment, topography, and specular microscopy prior to ACXL and were followed up for 24 months. Results. Mean age of the patients was 12.7 years with ten males and eight females. There was an improvement in the mean postoperative uncorrected distant visual acuity (from to ; ), mean corrected distant visual acuity (from to ; ), mean spherical refraction (from to ; ), mean cylinder (from to ; ), and spherical equivalent (from to ; ). Three eyes of two patients with vernal keratoconjunctivitis (VKC) showed progression. There were no intra- or postoperative complications. Conclusion. In pediatric patients ACXL is an effective and safe procedure for the management of keratoconus. Optimal management of VKC is important to arrest the progression of keratoconus. Rohit Shetty, Harsha Nagaraja, Chaitra Jayadev, Natasha Kishore Pahuja, Mathew Kurian Kummelil, and Rudy M. M. A. Nuijts Copyright © 2014 Rohit Shetty et al. All rights reserved. Hyperautofluorescence in Outer Retinal Layers Thinning Tue, 09 Sep 2014 13:31:46 +0000 http://www.hindawi.com/journals/bmri/2014/741538/ Purpose. To evaluate if paracentral hyperautofluorescence (HAF) retinal regions, which can be occasionally found and analyzed by optical coherence tomography (OCT), were related to retinal layer changes and to detect which layer was involved. Methods. This is a cross-sectional and retrospective study. 648 OCT files were revised. OCTs that showed a paracentral HAF area by using the fundus autofluorescence imaging in Heidelberg Spectralis (Heidelberg Engineering, Germany) were selected. Then retinal layer morphology was analyzed observing OCT scans and a retinal thickness was measured. Results. 31 patients were selected: 20 patients had chronic serous epitheliopathy (CSE), 8 patients had resolved central serous chorioretinopathy (CSC), and 3 patients wet age related macular degeneration (ARMD). The HAF zones corresponded to areas of thickness reduction of the external hyporeflective band. In all these areas the retinal pigment epithelium was not atrophic and the neuroepithelium was more or less dystrophic. In particular the retinal thickness was 264 um, 232 um, and 243 um in wet ARMD, CSE, and CSC, respectively; the reduction was significant () compared to the same area of the other eye. Discussion. The presence of HAF imaging might be mostly due to a “window effect” rather than an accumulation of lipofuscin. Marina Bertolotto, Luigi Borgia, and Michele Iester Copyright © 2014 Marina Bertolotto et al. All rights reserved. Imaging Mass Spectrometry by Matrix-Assisted Laser Desorption/Ionization and Stress-Strain Measurements in Iontophoresis Transepithelial Corneal Collagen Cross-Linking Tue, 02 Sep 2014 12:25:25 +0000 http://www.hindawi.com/journals/bmri/2014/404587/ Purpose. To compare biomechanical effect, riboflavin penetration and distribution in transepithelial corneal collagen cross-linking with iontophoresis (I-CXL), with standard cross linking (S-CXL) and current transepithelial protocol (TE-CXL). Materials and Methods. The study was divided into two different sections, considering, respectively, rabbit and human cadaver corneas. In both sections corneas were divided according to imbibition protocols and irradiation power. Imaging mass spectrometry by matrix-assisted laser desorption/ionization (MALDI-IMS) and stress-strain measurements were used. Forty-eight rabbit and twelve human cadaver corneas were evaluated. Results. MALDI-IMS showed a deep riboflavin penetration throughout the corneal layers with I-CXL, with a roughly lower concentration in the deepest layers when compared to S-CXL, whereas with TE-CXL penetration was considerably less. In rabbits, there was a significant increase (by 71.9% and ) in corneal rigidity after I-CXL, when compared to controls. In humans, corneal rigidity increase was not significantly different among the subgroups. Conclusions. In rabbits, I-CXL induced a significant increase in corneal stiffness as well as better riboflavin penetration when compared to controls and TE-CXL but not to S-CXL. Stress-strain in human corneas did not show significant differences among techniques, possibly because of the small sample size of groups. In conclusion, I-CXL could be a valid alternative to S-CXL for riboflavin delivery in CXL, preserving the epithelium. Paolo Vinciguerra, Rita Mencucci, Vito Romano, Eberhard Spoerl, Fabrizio I. Camesasca, Eleonora Favuzza, Claudio Azzolini, Rodolfo Mastropasqua, and Riccardo Vinciguerra Copyright © 2014 Paolo Vinciguerra et al. All rights reserved. Etiopathogenesis and Therapy of Epithelial Ingrowth after Descemet’s Stripping Automated Endothelial Keratoplasty Tue, 02 Sep 2014 06:03:52 +0000 http://www.hindawi.com/journals/bmri/2014/906087/ Descemet’s stripping endothelial keratoplasty is an emerging technique finalized to treat endothelial dysfunction replacing only the pathological portion of cornea. The advent of any new technique puts us in front of new complications. The epithelial ingrowth is a well-known complication already studied in case of ocular trauma and more recently in refractive surgery. This job analyzed the potential etiopathogenesis of epithelial ingrowth after DSAEK, reviewing the cases described in literature, and suggests the potential therapy. Francesco Semeraro, Attilio Di Salvatore, Alessandro Bova, and Eliana Forbice Copyright © 2014 Francesco Semeraro et al. All rights reserved. Vitreous Substitutes: From Tamponade Effect to Intraocular Inflammation Mon, 01 Sep 2014 09:57:14 +0000 http://www.hindawi.com/journals/bmri/2014/159832/ Mario R. Romano, Xun Xu, and Kenneth K. W. Li Copyright © 2014 Mario R. Romano et al. All rights reserved. Evaluation of Corneal Biomechanical Properties Modification after Small Incision Lenticule Extraction Using Scheimpflug-Based Noncontact Tonometer Sun, 31 Aug 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/290619/ Purpose. To quantify the effect of small incision lenticule extraction (SMILE) on the corneal biomechanics using Scheimpflug noncontact tonometer (Corvis ST). Methods. Twenty eyes of twenty patients, evaluated as eligible for surgery, with high myopia and/or moderate myopic astigmatism, underwent small incision lenticule extraction (SMILE). All patients underwent Corvis ST preoperatively and postoperatively after 1 week, and 1 and 3 months to observe alterations of corneal biomechanical properties. The main outcome measures were Deformation Amplitude, 1st-AT, and 2nd-AT. The relationship between the amount of stroma removed and the percentage variation of the measured parameters from baseline was evaluated with generalized linear model from each time point. For completeness also intraocular pressure (IOP), central corneal thickness (CCT), and their variations after surgery were evaluated. Results. The ratio between the amount of removed refractive error and, respectively, changes of Deformation Amplitude, 1st-AT, and 2nd-AT were significantly modified at the 1st week after surgery . At 1 and 3 months these values did not show statistically significant alterations. Intraocular pressure and central corneal thickness showed statistically significant changes during follow-up. Conclusions. No significant modifications in biomechanical properties were observed after SMILE so this procedure could induce only minimal transient alterations of corneal biomechanics. Leonardo Mastropasqua, Roberta Calienno, Manuela Lanzini, Martina Colasante, Alessandra Mastropasqua, Peter A. Mattei, and Mario Nubile Copyright © 2014 Leonardo Mastropasqua et al. All rights reserved. Descemetic and Predescemetic DALK in Keratoconus Patients: A Clinical and Confocal Perspective Study Tue, 26 Aug 2014 12:35:22 +0000 http://www.hindawi.com/journals/bmri/2014/123156/ Purpose. To evaluate the clinical outcomes and in vivo confocal microscopy (IVCM) features of keratoconus patients who underwent deep anterior lamellar keratoplasty (DALK). Methods. DALK was performed using the big bubble technique in all the patients. If the bubble was not successful to bare the descemet membrane, a manual dissection layer-by layer was performed to expose a deep stromal plane close to the DM. The patients were divided in two groups depending on the intraoperative baring of the descemet membrane: predescemetic DALK (PD-DALK) and descemetic DALK (D-DALK) group. Results. One month after surgery the D-DALK patients show an increase of mean BCVA. In the PD-DALK group mean BCVA did not show significant improvement as compared to preoperative values. At 6 months after surgery mean BCVA was found to be similar in both groups. At 1 month IVCM the peak of reflectivity of the interface was lower in D-DALK group compared to PD-DALK. At 6 months the values of reflectivity were comparable. Conclusions. At 1 month D-DALK seems to lead to a minor interface reflectivity and to a better BCVA; these differences disappear after 6 months and the values of interface reflectivity and BCVA are comparable between D-DALK and PD-DALK. Domenico Schiano-Lomoriello, Rossella Annamaria Colabelli-Gisoldi, Mario Nubile, Francesco Oddone, Giorgio Ducoli, Carlo Maria Villani, Leonardo Mastropasqua, and Augusto Pocobelli Copyright © 2014 Domenico Schiano-Lomoriello et al. All rights reserved. Corneal Collagen Cross-Linking with Hypoosmolar Riboflavin Solution in Keratoconic Corneas Thu, 14 Aug 2014 11:12:56 +0000 http://www.hindawi.com/journals/bmri/2014/754182/ Purpose. To report the 12-month outcomes of corneal collagen cross-linking (CXL) with a hypoosmolar riboflavin and ultraviolet-A (UVA) irradiation in thin corneas. Methods. Eight eyes underwent CXL using a hypoosmolar riboflavin solution after epithelial removal. The corrected distance visual acuity (CDVA), manifest refraction, the mean thinnest corneal thickness (MTCT), and the endothelial cell density (ECD) were evaluated before and 6 and 12 months after CXL. Results. The MTCT was 413.9 ± 12.4 μm before treatment and reduced to 381.1 ± 7.3 μm after the removal of the epithelium. After CXL, the thickness decreased to 410.3 ± 14.5 μm at the last follow-up. Before treatment, the mean K-value of the apex of the keratoconus corneas was 58.7 ± 3.5 diopters and slightly decreased (57.7 ± 4.9 diopters) at 12 months. The mean CDVA was 0.54 ± 0.23 logarithm of the minimal angle of resolution before treatment and increased to 0.51 ± 0.21 logarithm at the last follow-up. The ECD was 2731.4 ± 191.8 cells/mm2 before treatment and was 2733.4 ± 222.6 cells/mm2 at 12 months after treatment. Conclusions. CXL with a hypoosmolar riboflavin in thin corneas seems to be a promising method for keratoconic eyes with the mean thinnest corneal thickness less than 400 μm without epithelium. Shaofeng Gu, Zhaoshan Fan, Lihua Wang, Xiangchen Tao, Yong Zhang, and Guoying Mu Copyright © 2014 Shaofeng Gu et al. All rights reserved. Pattern Visual Evoked Potentials Elicited by Organic Electroluminescence Screen Thu, 14 Aug 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/606951/ Purpose. To determine whether organic electroluminescence (OLED) screens can be used as visual stimulators to elicit pattern-reversal visual evoked potentials (p-VEPs). Method. Checkerboard patterns were generated on a conventional cathode-ray tube (S710, Compaq Computer Co., USA) screen and on an OLED (17 inches, 320 × 230 mm, PVM-1741, Sony, Tokyo, Japan) screen. The time course of the luminance changes of each monitor was measured with a photodiode. The p-VEPs elicited by these two screens were recorded from 15 eyes of 9 healthy volunteers (22.0 ± 0.8 years). Results. The OLED screen had a constant time delay from the onset of the trigger signal to the start of the luminescence change. The delay during the reversal phase from black to white for the pattern was 1.0 msec on the cathode-ray tube (CRT) screen and 0.5 msec on the OLED screen. No significant differences in the amplitudes of P100 and the implicit times of N75 and P100 were observed in the p-VEPs elicited by the CRT and the OLED screens. Conclusion. The OLED screen can be used as a visual stimulator to elicit p-VEPs; however the time delay and the specific properties in the luminance change must be taken into account. Celso Soiti Matsumoto, Kei Shinoda, Harue Matsumoto, Hideaki Funada, Kakeru Sasaki, Haruka Minoda, Takeshi Iwata, and Atsushi Mizota Copyright © 2014 Celso Soiti Matsumoto et al. All rights reserved. Corneal Epithelial Wound Healing Promoted by Verbascoside-Based Liposomal Eyedrops Wed, 06 Aug 2014 09:36:40 +0000 http://www.hindawi.com/journals/bmri/2014/471642/ Different liposomal formulations were prepared to identify those capable of forming eyedrops for corneal diseases. Liposomes with neutral or slightly positive surface charge interact very well with the cornea. Then these formulations were loaded with verbascoside to heal a burn of corneal epithelium induced by alkali. The cornea surface affected involved in wound was monitored as a function of time. Experimental results were modeled by balance equation between the rate of healing, due to the flow of phenylpropanoid, and growth of the wound. The results indicate a latency time of only three hours and furthermore the corneal epithelium heals in 48 hours. Thus, the topical administration of verbascoside appears to reduce the action time of cells, as verified by histochemical and immunofluorescence assays. Luigi Ambrosone, Germano Guerra, Mariapia Cinelli, Mariaelena Filippelli, Monica Mosca, Francesco Vizzarri, Dario Giorgio, and Ciro Costagliola Copyright © 2014 Luigi Ambrosone et al. All rights reserved. Oxidative Stress Induces Endothelial Cell Senescence via Downregulation of Sirt6 Tue, 05 Aug 2014 11:02:45 +0000 http://www.hindawi.com/journals/bmri/2014/902842/ Accumulating evidence has shown that diabetes accelerates aging and endothelial cell senescence is involved in the pathogenesis of diabetic vascular complications, including diabetic retinopathy. Oxidative stress is recognized as a key factor in the induction of endothelial senescence and diabetic retinopathy. However, specific mechanisms involved in oxidative stress-induced endothelial senescence have not been elucidated. We hypothesized that Sirt6, which is a nuclear, chromatin-bound protein critically involved in many pathophysiologic processes such as aging and inflammation, may have a role in oxidative stress-induced vascular cell senescence. Measurement of Sirt6 expression in human endothelial cells revealed that H2O2 treatment significantly reduced Sirt6 protein. The loss of Sirt6 was associated with an induction of a senescence phenotype in endothelial cells, including decreased cell growth, proliferation and angiogenic ability, and increased expression of senescence-associated -galactosidase activity. Additionally, H2O2 treatment reduced eNOS expression, enhanced p21 expression, and dephosphorylated (activated) retinoblastoma (Rb) protein. All of these alternations were attenuated by overexpression of Sirt6, while partial knockdown of Sirt6 expression by siRNA mimicked the effect of H2O2. In conclusion, these results suggest that Sirt6 is a critical regulator of endothelial senescence and oxidative stress-induced downregulation of Sirt6 is likely involved in the pathogenesis of diabetic retinopathy. Rong Liu, Hua Liu, Yonju Ha, Ronald G. Tilton, and Wenbo Zhang Copyright © 2014 Rong Liu et al. All rights reserved. Mechanical Models of the Dynamics of Vitreous Substitutes Thu, 24 Jul 2014 10:05:40 +0000 http://www.hindawi.com/journals/bmri/2014/672926/ We discuss some aspects of the fluid dynamics of vitreous substitutes in the vitreous chamber, focussing on the flow induced by rotations of the eye bulb. We use simple, yet not trivial, theoretical models to highlight mechanical concepts that are relevant to understand the dynamics of vitreous substitutes and also to identify ideal properties for vitreous replacement fluids. We first recall results by previous authors, showing that the maximum shear stress on the retina grows with increasing viscosity of the fluid up to a saturation value. We then investigate how the wall shear stress changes if a thin layer of aqueous humour is present in the vitreous chamber, separating the retina from the vitreous replacement fluid. The theoretical predictions show that the existence of a thin layer of aqueous is sufficient to substantially decrease the shear stress on the retina. We finally discuss a theoretical model that predicts the stability conditions of the interface between the aqueous and a vitreous substitute. We discuss the implications of this model to understand the mechanisms leading to the formation of emulsion in the vitreous chamber, showing that instability of the interface is possible in a range of parameters relevant for the human eye. Krystyna Isakova, Jan O. Pralits, Rodolfo Repetto, and Mario R. Romano Copyright © 2014 Krystyna Isakova et al. All rights reserved. Evaluation of the Efficacy of 50% Autologous Serum Eye Drops in Different Ocular Surface Pathologies Tue, 22 Jul 2014 11:19:38 +0000 http://www.hindawi.com/journals/bmri/2014/826970/ Purpose. This study evaluated the efficacy of 50% autologous serum eye drops in ocular surface diseases not improved by conventional therapy. Methods. We analyzed two groups: (1) acute eye pathologies (e.g., chemical burns) and (2) chronic eye pathologies (e.g., recurrent corneal erosion, neurotropic keratitis, and keratoconjunctivitis sicca). The patients were treated for surface instability after conventional therapy. The patients received therapy 5 times a day until stabilization of the framework; they then reduced therapy to 3 times a day for at least 3 months. We analyzed the best corrected visual acuity, epithelial defects, inflammation, corneal opacity, and corneal neovascularization. We also analyzed symptoms such as tearing, burning, sense of foreign body or sand, photophobia, blurred vision, and difficulty opening the eyelids. Results. We enrolled 15 eyes in group 1 and 11 eyes in group 2. The average therapy period was 16 ± 5.86 weeks in group 1 and 30.54 ± 20.33 weeks in group 2. The epithelial defects all resolved. Signs and symptoms improved in both groups. In group 2, the defect recurred after the suspension of therapy in 2 (18%) patients; in group 1, no defects recurred. Conclusions. Autologous serum eye drops effectively stabilize and improve signs and symptoms in eyes previously treated with conventional therapy. Francesco Semeraro, Eliana Forbice, Osvaldo Braga, Alessandro Bova, Attilio Di Salvatore, and Claudio Azzolini Copyright © 2014 Francesco Semeraro et al. All rights reserved. IOL Power Calculation after Corneal Refractive Surgery Mon, 21 Jul 2014 07:11:06 +0000 http://www.hindawi.com/journals/bmri/2014/658350/ Purpose. To describe the different formulas that try to overcome the problem of calculating the intraocular lens (IOL) power in patients that underwent corneal refractive surgery (CRS). Methods. A Pubmed literature search review of all published articles, on keyword associated with IOL power calculation and corneal refractive surgery, as well as the reference lists of retrieved articles, was performed. Results. A total of 33 peer reviewed articles dealing with methods that try to overcome the problem of calculating the IOL power in patients that underwent CRS were found. According to the information needed to try to overcome this problem, the methods were divided in two main categories: 18 methods were based on the knowledge of the patient clinical history and 15 methods that do not require such knowledge. The first group was further divided into five subgroups based on the parameters needed to make such calculation. Conclusion. In the light of our findings, to avoid postoperative nasty surprises, we suggest using only those methods that have shown good results in a large number of patients, possibly by averaging the results obtained with these methods. Maddalena De Bernardo, Luigi Capasso, Luisa Caliendo, Francesco Paolercio, and Nicola Rosa Copyright © 2014 Maddalena De Bernardo et al. All rights reserved. Anterior Segment Optical Coherence Tomography Imaging of Conjunctival Filtering Blebs after Glaucoma Surgery Sun, 20 Jul 2014 09:09:07 +0000 http://www.hindawi.com/journals/bmri/2014/610623/ Time domain (TD) and spectral domain (SD) optical coherence tomography (OCT) are cross-sectional, noncontact, high-resolution diagnostic modalities for posterior and anterior segment (AS) imaging. The AS-OCT provides tomographic imaging of the cornea, iris, lens, and anterior chamber (AC) angle in several ophthalmic diseases. In glaucoma, AS-OCT is utilized to evaluate the morphology of AS structures involved in the pathogenesis of the disease, to obtain morphometric measures of the AC, to evaluate the suitability for laser or surgical approaches, and to assess modifications after treatment. In patients undergoing surgery, AS-OCT is crucial in the evaluation of the filtering bleb functionality, permitting a combined qualitative and quantitative analysis. In this field, AS-OCT may help clinicians in distinguishing between functioning and nonfunctioning blebs by classifying their macroscopic morphology, describing bleb-wall features, bleb cavity, and scleral opening. This information is critical in recognizing signs of filtration failure earlier than the clinical approach and in planning the appropriate timing for management procedures in failing blebs. In this review, we summarize the applications of AS-OCT in the conjunctival bleb assessment. Rodolfo Mastropasqua, Vincenzo Fasanella, Luca Agnifili, Claudia Curcio, Marco Ciancaglini, and Leonardo Mastropasqua Copyright © 2014 Rodolfo Mastropasqua et al. All rights reserved. Cystic Fibrosis and New Trends by Ophthalmological Evaluation: A Pilot Study Tue, 15 Jul 2014 12:54:40 +0000 http://www.hindawi.com/journals/bmri/2014/580373/ Background. Cystic fibrosis (CF) is characterized by hypoxia that affects several organic tissues. Retinal ganglion cells may suffer from the hypoxic status, and this may lead to alterations of retinal nerve fiber. Methods. Twenty-two eyes in CF patients were analyzed. A complete ocular evaluation and visual field exams of the 30 central degrees were performed using the frequency doubling technology (FDT). Forced expiratory volume in one second (FEV1%), forced vital capacity (FVC%), oxyhaemoglobin saturation (SpO2%), and hematocrit (Ht%) have been calculated. FDT analyzed parameters were mean deviation (MD) and pattern standard deviation (PSD). Pearson’s correlation was chosen as statistical analysis. Results. Data showed statistically significant relationship between MD and Ht% ( value −0.18; ), MD and FEV1% ( value −0.68; ), and MD and FVC% ( value −0.45; ). Moreover, there were correlations between PSD and Ht% ( value 0.29; ), PSD and SpO2% ( value −0.31; ), PSD and FEV1% ( value 0.71; ), and PSD and FVC% ( value 0.63; ). Conclusions. The oxygen supply alterations might determine hypoxia of the ganglion cells causing a decrease of receptive optic nerve fiber activity. This method could be also useful to evaluate indirectly pulmonary activity of the CF disease. Marcella Nebbioso, Serena Quattrucci, Emanuela Leggieri, Leopoldo Spadea, and Enzo Maria Vingolo Copyright © 2014 Marcella Nebbioso et al. All rights reserved. Some Physicochemical Remarks on Spontaneous Emulsification of Vitreal Tamponades Tue, 15 Jul 2014 07:07:15 +0000 http://www.hindawi.com/journals/bmri/2014/243056/ The importance of gravitational instability in determining the emulsification of vitreal tamponades is discussed. Theoretical results and numerical simulations indicate that the spontaneous formation of water-silicon oil is a rare event and that the very low concentration of surface active agents cannot justify the systematic formation of emulsions. The gravitational instabilities seem to play the main role. Our theoretical results seem in agreement with the experimental evidences; furthermore they indicate a future research line for the improvement of endotamponades. Indeed, the use of biodegradable antifoam may avoid the formation of bubbles and delay the formation of emulsions. Ciro Costagliola, Francesco Semeraro, Roberto dell’Omo, Lucio Zeppa, Gennaro Bufalo, Michele Cardone, Mario Romano, and Luigi Ambrosone Copyright © 2014 Ciro Costagliola et al. All rights reserved. Comparative Study of Corneal Endothelial Cell Damage after Femtosecond Laser Assisted Deep Stromal Dissection Thu, 10 Jul 2014 07:36:46 +0000 http://www.hindawi.com/journals/bmri/2014/731565/ Purpose. To find a relatively safe designed stromal bed thickness to avoid endothelial damage for lamellar keratoplasty with an Allegretto Wavelight FS200 femtosecond laser. Methods. Twelve rabbits were randomly divided into 50 μm and 150 μm groups according to the anticipated residue stromal bed thickness preparation with a femtosecond laser. Six rabbits without laser cutting were used as a control group. Central endothelial images were analyzed with in vivo confocal microscopy and scanning electron microscopy. The apoptosis of endothelium was evaluated with Hoechst 33342 staining and a TUNEL assay. Results. The endothelium of the 50 μm group had extensive injuries upon in vivo confocal and scanning electron microscopic observation, and minor injuries were observed in the 150 μm group. Moreover, more apoptotic cells were observed in the 50 μm group. Conclusions. When using a FS200 femtosecond laser assisted anterior lamellar keratoplasty, there was minor endothelium damage with a 150 μm stromal bed, and a more than 150 μm thickness stromal bed design may prevent the damage of corneal endothelium. Ting Liu, Jingjing Zhang, Dapeng Sun, Wenjie Sui, Yangyang Zhang, Dongfang Li, Zhaoli Chen, and Hua Gao Copyright © 2014 Ting Liu et al. All rights reserved. Caspase-14 Expression Impairs Retinal Pigment Epithelium Barrier Function: Potential Role in Diabetic Macular Edema Wed, 09 Jul 2014 11:14:33 +0000 http://www.hindawi.com/journals/bmri/2014/417986/ We recently showed that caspase-14 is a novel molecule in retina with potential role in accelerated vascular cell death during diabetic retinopathy (DR). Here, we evaluated whether caspase-14 is implicated in retinal pigment epithelial cells (RPE) dysfunction under hyperglycemia. The impact of high glucose (HG, 30 mM D-glucose) on caspase-14 expression in human RPE (ARPE-19) cells was tested, which showed significant increase in caspase-14 expression compared with normal glucose (5 mM D-glucose + 25 mM L-glucose). We also evaluated the impact of modulating caspase-14 expression on RPE cells barrier function, phagocytosis, and activation of other caspases using ARPE-19 cells transfected with caspase-14 plasmid or caspase-14 siRNA. We used FITC-dextran flux assay and electric cell substrate impedance sensing (ECIS) to test the changes in RPE cell barrier function. Similar to HG, caspase-14 expression in ARPE-19 cells increased FITC-dextran leakage through the confluent monolayer and decreased the transcellular electrical resistance (TER). These effects of HG were prevented by caspase-14 knockdown. Furthermore, caspase-14 knockdown prevented the HG-induced activation of caspase-1 and caspase-9, the only activated caspases by HG. Phagocytic activity was unaffected by caspase-14 expression. Our results suggest that caspase-14 contributes to RPE cell barrier disruption under hyperglycemic conditions and thus plays a role in the development of diabetic macular edema. Selina Beasley, Mohamed El-Sherbiny, Sylvia Megyerdi, Sally El-Shafey, Karishma Choksi, Ismail Kaddour-Djebbar, Nader Sheibani, Stephen Hsu, and Mohamed Al-Shabrawey Copyright © 2014 Selina Beasley et al. All rights reserved. Heavy Silicone Oil and Intraocular Inflammation Tue, 08 Jul 2014 05:53:54 +0000 http://www.hindawi.com/journals/bmri/2014/574825/ In the past two decades, many advances have been made in vitrectomy instrumentation, surgical techniques, and the use of different tamponade agents. These agents serve close retinal breaks, confine eventual retinal redetachment, and prevent proliferative vitreoretinopathy (PVR). Long-acting gases and silicone oil are effective internal tamponade agents; however, because their specific gravity is lower than that of the vitreous fluid, they may provide adequate support for the superior retina but lack efficacy for the inferior retina, especially when the fill is subtotal. Thus, a specific role may exist for an internal tamponade agent with a higher specific gravity, such as heavy silicone oils (HSOs), Densiron 68, Oxane HD, HWS 45-300, HWS 46-3000, and HeavySil. Some clinical evidence seems to presume that heavy tamponades are more prone to intraocular inflammation than standard silicone if they remain in the eye for several months. In this review, we discuss the fundamental clinical and biochemical/molecular mechanisms involved in the inflammatory response after the use of heavy tamponade: toxicity due to impurities or instability of the agent, direct toxicity and immunogenicity, oil emulsification, and mechanical injury due to gravity. The physical and chemical properties of various HSOs and their efficacy and safety profiles are also described. Francesco Morescalchi, Ciro Costagliola, Sarah Duse, Elena Gambicorti, Barbara Parolini, Barbara Arcidiacono, Mario R. Romano, and Francesco Semeraro Copyright © 2014 Francesco Morescalchi et al. All rights reserved. Evaluation of Macular Retinal Ganglion Cell-Inner Plexiform Layer Thickness after Vitrectomy with Internal Limiting Membrane Peeling for Idiopathic Macular Holes Mon, 07 Jul 2014 09:05:28 +0000 http://www.hindawi.com/journals/bmri/2014/458631/ Purpose. To evaluate macular retinal ganglion cell-inner plexiform layer (GCIPL) thickness changes after Brilliant Blue G-assisted internal limiting membrane peeling for idiopathic macular hole repair using a high-resolution spectral-domain optical coherence tomography (SD-OCT). Methods. 32 eyes from 32 patients with idiopathic macular holes who underwent vitrectomy with internal limiting membrane peeling between January 2011 and July 2012 were retrospectively analyzed. GCIPL thickness was measured before surgery, and at one month and at six months after surgery. Values obtained from automated and semimanual SD-OCT segmentation analysis were compared (Cirrus HD-OCT, Carl Zeiss Meditec, Dublin, CA). Results. No significant differences were found between average GCIPL thickness values between preoperative and postoperative analysis. However, statistical significant differences were found in GCIPL thickness at the temporal macular quadrants at six months after surgery. Quality measurement analysis performed by automated segmentation revealed a significant number of segmentation errors. Semimanual segmentation slightly improved the quality of the results. Conclusion. SD-OCT analysis of GCIPL thickness found a significant reduction at the temporal macular quadrants at 6 months after Brilliant Blue G-assisted internal limiting membrane peeling for idiopathic macular hole. Alfonso L. Sabater, Álvaro Velázquez-Villoria, Miguel A. Zapata, Marta S. Figueroa, Marta Suárez-Leoz, Luis Arrevola, María-Ángeles Teijeiro, and Alfredo García-Layana Copyright © 2014 Alfonso L. Sabater et al. All rights reserved. Comparison of Reaction Response Time between Hand and Foot Controlled Devices in Simulated Microsurgical Testing Sun, 06 Jul 2014 08:15:12 +0000 http://www.hindawi.com/journals/bmri/2014/769296/ Purpose. We hypothesized that reaction times (RTs) for a switch release are faster for hand-controlled than for foot-controlled switches for physiological and anatomical reasons (e.g., nerve conduction speed). The risk of accidental trauma could be reduced if the surgeon reacted quicker and therefore improve the surgical outcome. Method. We included 47 medical professionals at USC. Demographics and handedness were recorded. Under a microscope, a simple reaction time test was performed, testing all extremities multiple times in a random order. Additionally, a subjective questionnaire was administered. Results. The mean RTs for hands are 318.24 ms 51.13 and feet . The comparison of hand versus foot showed significant shorter RTs for the hand (). Partially significant differences between and within the experience level groups could be demonstrated by level of education (LE) and microscopic surgeries/week (MSW) (). In the subjective questionnaire, 91.5% () of test subjects prefer to use hand controls. Conclusion. Our data show that the RT for hands is faster than feet. Similarly the subjective questionnaire showed a greater preference for hand actuation. This data suggest a hand-controlled ophthalmic instrument might have distinct advantages; however, clinical correlation is required. Marcel Pfister, Jaw-Chyng L. Lue, Francisco R. Stefanini, Paulo Falabella, Laurie Dustin, Michael J. Koss, and Mark S. Humayun Copyright © 2014 Marcel Pfister et al. All rights reserved. Assessment of the Optic Disc Morphology Using Spectral-Domain Optical Coherence Tomography and Scanning Laser Ophthalmoscopy Sun, 06 Jul 2014 06:11:08 +0000 http://www.hindawi.com/journals/bmri/2014/275654/ Objective. To compare the equivalent optic nerve head (OHN) parameters obtained with confocal scanning laser ophthalmoscopy (HRT3) and spectral-domain optical coherence tomography (OCT) in healthy and glaucoma patients. Methods. One hundred and eighty-two consecutive healthy subjects and 156 patients with open-angle glaucoma were divided into 2 groups according to intraocular pressure and visual field outcomes. All participants underwent imaging of the ONH with the HRT3 and the Cirrus OCT. The ONH parameters and the receiver operating characteristic (ROC) curves were compared between both groups. Results. Mean age did not differ between the normal and glaucoma groups (59.55 ± 9.7 years and 61.05 ± 9.4 years, resp.; ). Rim area, average cup-to-disc (C/D) ratio, vertical C/D ratio, and cup volume were different between both instruments (). All equivalent ONH parameters, except disc area, were different between both groups (). The best areas under the ROC curve were observed for vertical C/D ratio (0.980 for OCT and 0.942 for HRT3; ). Sensitivities at 95% fixed-specificities of OCT parameters were higher than those of HRT3. Conclusions. Equivalent ONH parameters of Cirrus OCT and HRT3 are different and cannot be used interchangeably. ONH parameters measured with OCT yielded a slightly better diagnostic performance. Pilar Calvo, Antonio Ferreras, Beatriz Abadia, Mirian Ara, Michele Figus, Luis E. Pablo, and Paolo Frezzotti Copyright © 2014 Pilar Calvo et al. All rights reserved. Molecular Mechanisms of Diabetic Retinopathy, General Preventive Strategies, and Novel Therapeutic Targets Sun, 06 Jul 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/801269/ The growing number of people with diabetes worldwide suggests that diabetic retinopathy (DR) and diabetic macular edema (DME) will continue to be sight threatening factors. The pathogenesis of diabetic retinopathy is a widespread cause of visual impairment in the world and a range of hyperglycemia-linked pathways have been implicated in the initiation and progression of this condition. Despite understanding the polyol pathway flux, activation of protein kinase C (KPC) isoforms, increased hexosamine pathway flux, and increased advanced glycation end-product (AGE) formation, pathogenic mechanisms underlying diabetes induced vision loss are not fully understood. The purpose of this paper is to review molecular mechanisms that regulate cell survival and apoptosis of retinal cells and discuss new and exciting therapeutic targets with comparison to the old and inefficient preventive strategies. This review highlights the recent advancements in understanding hyperglycemia-induced biochemical and molecular alterations, systemic metabolic factors, and aberrant activation of signaling cascades that ultimately lead to activation of a number of transcription factors causing functional and structural damage to retinal cells. It also reviews the established interventions and emerging molecular targets to avert diabetic retinopathy and its associated risk factors. Sher Zaman Safi, Rajes Qvist, Selva Kumar, Kalaivani Batumalaie, and Ikram Shah Bin Ismail Copyright © 2014 Sher Zaman Safi et al. All rights reserved. Nutritional Risk Factors for Age-Related Macular Degeneration Thu, 03 Jul 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/413150/ Purpose. To evaluate the role of nutritional factors, serum lipids, and lipoproteins in late age-related macular degeneration (late AMD). Methods. Intake of red meat, fruit, fish, vegetables, and alcohol, smoking status, and body mass index (BMI) were ascertained questionnaire-based in 1147 late AMD cases and 1773 controls from the European Genetic Database. Serum levels of lipids and lipoproteins were determined. The relationship between nutritional factors and late AMD was assessed using logistic regression. Based on multivariate analysis, area-under-the-curve (AUC) was calculated by receiver-operating-characteristics (ROC). Results. In a multivariate analysis, besides age and smoking, obesity (odds ratio (OR): 1.44, ) and red meat intake (daily: OR: 2.34, ; 2–6x/week: OR: 1.67, ) were identified as risk factors for developing late AMD. Fruit intake showed a protective effect (daily: OR: 0.52, ; 2–6x/week: OR: 0.58, ). Serum lipid and lipoprotein levels showed no significant association with late AMD. ROC for nutritional factors, smoking, age, and BMI revealed an AUC of 0.781. Conclusion. Red meat intake and obesity were independently associated with increased risk for late AMD, whereas fruit intake was protective. A better understanding of nutritional risk factors is necessary for the prevention of AMD. Lebriz Ersoy, Tina Ristau, Yara T. Lechanteur, Moritz Hahn, Carel B. Hoyng, Bernd Kirchhof, Anneke I. den Hollander, and Sascha Fauser Copyright © 2014 Lebriz Ersoy et al. All rights reserved. Tamponade or Filling Effect: Changes of Forces in Myopic Eyes Wed, 02 Jul 2014 07:41:45 +0000 http://www.hindawi.com/journals/bmri/2014/618382/ Myopia is the most common ocular abnormality. Its high and growing prevalence has contributed to a recent surge in surgical interest in the disorder, since retinal detachment in eyes with high myopia differs from that in emmetropic eyes or eyes with low myopia. The myopic eye, because of its specific anatomy, poses special challenges that need to be overcome to ensure the appropriate use of vitreous substitutes. However, intraocular tamponades have shown great potential for revolutionizing retinal detachment surgery and vitreomacular surgery in general in myopic eyes. We provide an updated review of the clinical use of vitreous substitutes in the myopic eye, paying particular attention to analyzing the ideal function of endotamponade agents and comparing the effects of these agents on the physical and biological properties of the eye. Francesco Semeraro, Francesco Morescalchi, Andrea Russo, Mario R. Romano, and Ciro Costagliola Copyright © 2014 Francesco Semeraro et al. All rights reserved. Predictive Factors Affecting the Short Term and Long Term Exodrift in Patients with Intermittent Exotropia after Bilateral Rectus Muscle Recession and Its Effect on Surgical Outcome Wed, 02 Jul 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/482093/ Purpose. To determine the predictive factors that affect short term and long term postoperative drift in intermittent exotropia after bilateral lateral rectus recession and to evaluate its effect on surgical outcome. Methods. Retrospective review of 203 patients with diagnosis of intermittent exotropia, who had surgical corrections with more than 3 years of followup. Different preoperative parameters were obtained and evaluated using Pearson’s correlation analysis. Results. The proportion of exodrift increased from 62% at 6 weeks to 84% at 3 years postoperatively. The postoperative drift was  PD at 6 weeks,  PD at 6 months,  PD at 1 year,  PD at 2 years, and  PD at 3 years. Preoperative deviation and initial overcorrection were significant factors affecting the postoperative drift at 3 years (, , , and , resp.). Conclusions. Postoperative exodrift along three years occurs in a majority of patients after bilateral lateral rectus recession for intermittent exotropia. The long term surgical success is significantly affected by this postoperative exodrift. A larger preoperative deviation and a larger initial overcorrection are associated with a larger early and late postoperative exodrift. Jason C. S. Yam, Gabriela S. L. Chong, Patrick K. W. Wu, Ursula S. F. Wong, Clement W. N. Chan, and Simon T. C. Ko Copyright © 2014 Jason C. S. Yam et al. All rights reserved. Advance in ERG Analysis: From Peak Time and Amplitude to Frequency, Power, and Energy Tue, 01 Jul 2014 10:22:04 +0000 http://www.hindawi.com/journals/bmri/2014/246096/ Purpose. To compare time domain (TD: peak time and amplitude) analysis of the human photopic electroretinogram (ERG) with measures obtained in the frequency domain (Fourier analysis: FA) and in the time-frequency domain (continuous (CWT) and discrete (DWT) wavelet transforms). Methods. Normal ERGs were analyzed using traditional peak time and amplitude measurements of the a- and b-waves in the TD and descriptors extracted from FA, CWT, and DWT. Selected descriptors were also compared in their ability to monitor the long-term consequences of disease process. Results. Each method extracted relevant information but had distinct limitations (i.e., temporal and frequency resolutions). The DWT offered the best compromise by allowing us to extract more relevant descriptors of the ERG signal at the cost of lesser temporal and frequency resolutions. Follow-ups of disease progression were more prolonged with the DWT (max 29 years compared to 13 with TD). Conclusions. Standardized time domain analysis of retinal function should be complemented with advanced DWT descriptors of the ERG. This method should allow more sensitive/specific quantifications of ERG responses, facilitate follow-up of disease progression, and identify diagnostically significant changes of ERG waveforms that are not resolved when the analysis is only limited to time domain measurements. Mathieu Gauvin, Jean-Marc Lina, and Pierre Lachapelle Copyright © 2014 Mathieu Gauvin et al. All rights reserved. Dose-Response-Relationship between Number of Laser Burns and IOP Reduction in Cyclophotocoagulation: An Animal Study Sun, 29 Jun 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/983102/ Purpose. The relationship between number of laser burns of cyclophotocoagulation (CPC) and intraocular pressure (IOP) reduction is unknown. This animal model was established to reveal a possible dose-response-relationship between the number of applied laser burns and the IOP lowering effect. Methods. 30 chinchilla bastard rabbits were divided into 5 groups and treated with either 1, 5, 10, 20, or 30 CPC burns, respectively. IOP was followed up for 1 week. IOP reduction of a single 30-burn treatment was compared with a fractionated treatment (three sessions; one week in between; 10 burns/session). Results. IOP reduction increases nonlinearly with the number of CPC burns (max.  mmHg). Fractionated treatment shows similar IOP reduction with less complications and more constant results compared to single session treatment. Conclusions. The study reveals a complex relationship between IOP reduction and the number of CPC burns. Fractionated CPC gives comparable IOP reduction at a higher degree of safety. Lars Wagenfeld, Hendrik Schwarzer, Gernot Roessler, Maren Klemm, Christos Skevas, Gisbert Richard, and Oliver Zeitz Copyright © 2014 Lars Wagenfeld et al. All rights reserved. Evaluation of Corneal Deformation Analyzed with Scheimpflug Based Device in Healthy Eyes and Diseased Ones Mon, 23 Jun 2014 12:55:04 +0000 http://www.hindawi.com/journals/bmri/2014/748671/ This study was designed to evaluate the correlation between corneal biomechanical and morphological data in healthy eyes, eyes that underwent myopic photorefractive keratectomy (PRK), keratoconus affected eyes, and keratoconus affected eyes that underwent corneal collagen crosslinking (CCC). Complete clinical eye examination of all eyes was followed by tomographic (Pentacam, Oculus, Wetzlar, Germany) and biomechanical (Corvis ST, Oculus, Wetzlar, Germany) evaluation. Differences among Corvis ST (CST) parameters in the different groups have been performed. Linear regression between central corneal thickness (CCT), intraocular pressure (IOP), and anterior corneal curvature measured with Sim’K (KM), versus corneal deformation parameters measured with Corvis ST in the different groups, has been run using SPSS software version 18.0. We evaluated 64 healthy eyes of 64 patients with a mean refractive error of  D (measured as spherical equivalent), 17 eyes of 17 patients that underwent myopic PRK for a mean refractive defect of  D (measured as spherical equivalent), 16 eyes of 16 patients affected by keratconus (stage 2-3 of Amsler Classification), and 13 eyes of 13 patients affected by keratoconus that underwent CCC. Our data suggest that corneal curvature would have a greater influence on corneal deformation than CCT; in fact KM values are more strongly associated with more CST parameters both about corneal change in shape and both about the corneal ability to come back at original shape. Michele Lanza, Michela Cennamo, Stefania Iaccarino, Carlo Irregolare, Miguel Rechichi, Mario Bifani, and Ugo Antonello Gironi Carnevale Copyright © 2014 Michele Lanza et al. All rights reserved. Testing of Visual Field with Virtual Reality Goggles in Manual and Visual Grasp Modes Mon, 23 Jun 2014 07:57:19 +0000 http://www.hindawi.com/journals/bmri/2014/206082/ Automated perimetry is used for the assessment of visual function in a variety of ophthalmic and neurologic diseases. We report development and clinical testing of a compact, head-mounted, and eye-tracking perimeter (VirtualEye) that provides a more comfortable test environment than the standard instrumentation. VirtualEye performs the equivalent of a full threshold 24-2 visual field in two modes: (1) manual, with patient response registered with a mouse click, and (2) visual grasp, where the eye tracker senses change in gaze direction as evidence of target acquisition. 59 patients successfully completed the test in manual mode and 40 in visual grasp mode, with 59 undergoing the standard Humphrey field analyzer (HFA) testing. Large visual field defects were reliably detected by VirtualEye. Point-by-point comparison between the results obtained with the different modalities indicates: (1) minimal systematic differences between measurements taken in visual grasp and manual modes, (2) the average standard deviation of the difference distributions of about 5 dB, and (3) a systematic shift (of 4–6 dB) to lower sensitivities for VirtualEye device, observed mostly in high dB range. The usability survey suggested patients’ acceptance of the head-mounted device. The study appears to validate the concepts of a head-mounted perimeter and the visual grasp mode. Dariusz Wroblewski, Brian A. Francis, Alfredo Sadun, Ghazal Vakili, and Vikas Chopra Copyright © 2014 Dariusz Wroblewski et al. All rights reserved. Corneal Collagen Cross-Linking with and without Epithelial Removal: A Contralateral Study with 0.5% Hypotonic Riboflavin Solution Sun, 22 Jun 2014 13:15:55 +0000 http://www.hindawi.com/journals/bmri/2014/619398/ Purpose. Our main purpose was to compare safety and efficacy in the treatment of progressive keratoconus with “epithelium-on” and “epithelium-off” corneal collagen cross-linking (CXL). Our secondary purpose was to evaluate efficacy of CXL when hypotonic 0.5% riboflavin is used as photosensitizer. Methods. One eye of 20 patients with bilateral progressive keratoconus was randomly treated for “epithelium-on” CXL (group 1) while the fellow eye underwent “epithelium-off” CXL (group 2). Hypotonic 0.5% riboflavin was used in both groups. Visual acuity, refraction, corneal topography, and wavefront aberrometry were evaluated at baseline and after 1, 6, and 12 months. Specular microscopy was performed on 10 patients preoperatively and after 12 months. Postoperative pain was evaluated using a patient questionnaire. Results. Uncorrected and corrected distance visual acuity improved significantly in both groups. Refraction, topography, and aberrometry showed nonsignificant changes from the preoperative status throughout the 12-month follow-up in both groups. Moreover, the outcomes between the groups were comparable at all follow-up points. Endothelial cell-count was stable. Postoperative pain length was shorter in group 1 . Conclusion. “Epithelium-on” and “epithelium-off” CXL using hypotonic 0.5% riboflavin were equally safe and effective in stabilization of keratoconus. Topography and aberrometry outcomes in both groups failed to show any significant improvements. This study is registered at ClinicalTrials.gov: NCT01181219. Aleksandar Stojanovic, Wen Zhou, and Tor Paaske Utheim Copyright © 2014 Aleksandar Stojanovic et al. All rights reserved. The Outcomes of Primary Scleral Buckling during Repair of Posterior Segment Open-Globe Injuries Sun, 22 Jun 2014 13:14:41 +0000 http://www.hindawi.com/journals/bmri/2014/613434/ Objective. To compare visual outcomes of eyes which underwent primary scleral buckling (PSB) treatment during posterior segment open-globe injury (OGI) repair with eyes not treated with PSB. Methods. We retrospectively reviewed 38 eyes which underwent a posterior segment OGI repair with no preoperative evidence of retinal detachment (RD) at Soroka University Medical Center (1995–2010). 19 (50%) underwent scleral repair alone (control group) and the other 19 eyes were treated with PSB also (PSB group). We compared visual outcomes in these two groups and rates of subsequent postoperative complications. Results. Baseline characteristics of the groups were similar. Compared with the control group, the PSB group had statistically significant lower rates of proliferative vitreoretinopathy (PVR) (5.3% versus 38.4%, ) and a trend towards lower rates of RD (15.8% versus 41.1%, ). PSB group eyes had a statistically significant improvement of their best distance visual acuity (BDVA) with lower means of final BDVA-grade () and logMAR vision (). Eyes in the control group had no improvement in these parameters. Conclusion. PSB procedure during posterior segment OGI repair may decrease the risk of subsequent retinal complications and improve final visual outcome. Dan Cohen, Jaime Levy, Tova Lifshitz, Nadav Belfair, Itamar Klemperer, Noam Yanculovich, and Boris Knyazer Copyright © 2014 Dan Cohen et al. All rights reserved. Silibinin Inhibits ICAM-1 Expression via Regulation of N-Linked and O-Linked Glycosylation in ARPE-19 Cells Tue, 17 Jun 2014 07:42:26 +0000 http://www.hindawi.com/journals/bmri/2014/701395/ To evaluate the effects of silibinin on intercellular adhesion molecule-1 (ICAM-1) expression, we used ARPE-19 cells as a model in which tumor necrosis factor (TNF-α) and interferon (IFN-γ) enhanced ICAM-1 expression. This upregulation was inhibited by silibinin. In an adherence assay using ARPE-19 and THP-1 cells, silibinin inhibited the cell adhesion function of ICAM-1. The inhibitory effects of silibinin on ICAM-1 expression were mediated via the blockage of nuclear translocation of p65 proteins in TNF-α and phosphorylation of STAT1 in IFN-γ-stimulated cells. In addition, silibinin altered the degree of N-linked glycosylation posttranslationally in ARPE-19 cells by significantly enhancing MGAT3 gene expression. Silibinin can increase the O-GlcNAc levels of glycoproteins in ARPE-19 cells. In a reporter gene assay, PUGNAc, which can also increase O-GlcNAc levels, inhibited NF-κB reporter activity in TNF-α-induced ARPE-19 cells and this process was augmented by silibinin treatment. Overexpression of OGT gene was associated with reduced TNF-α-induced ICAM-1 levels, which is consistent with that induced by silibinin treatment. Taken together, silibinin inhibits ICAM-1 expression and its function through altered O-linked glycosylation in NF-κB and STAT1 signaling pathways and decreases the N-linked glycosylation of ICAM-1 transmembrane protein in proinflammatory cytokine-stimulated ARPE-19 cells. Yi-Hao Chen, Ching-Long Chen, Chang-Min Liang, Jy-Been Liang, Ming-Cheng Tai, Yun-Hsiang Chang, Da-Wen Lu, and Jiann-Torng Chen Copyright © 2014 Yi-Hao Chen et al. All rights reserved. Relationship between Spectral-Domain Optical Coherence Tomography and Standard Automated Perimetry in Healthy and Glaucoma Patients Mon, 16 Jun 2014 09:40:40 +0000 http://www.hindawi.com/journals/bmri/2014/514948/ Objective. To evaluate the relationship between spectral-domain optical coherence tomography (OCT) and standard automated perimetry (SAP) in healthy and glaucoma individuals. Methods. The sample comprised 338 individuals divided into 2 groups according to intraocular pressure and visual field outcomes. All participants underwent a reliable SAP and imaging of the optic nerve head with the Cirrus OCT. Pearson correlations were calculated between threshold sensitivity values of SAP (converted to linear scale) and OCT parameters. Results. Mean age did not differ between the control and glaucoma groups (59.55 ± 9.7 years and 61.05 ± 9.4 years, resp.; ). Significant differences were found for the threshold sensitivities at each of the 52 points evaluated with SAP () and the peripapillary retinal nerve fiber layer (RNFL) thicknesses, except at 3 and 9 clock-hour positions between both groups. Mild to moderate correlations (ranging between 0.286 and 0.593; ) were observed between SAP and most OCT parameters in the glaucoma group. The strongest correlations were found between the inferior RNFL thickness and the superior hemifield points. The healthy group showed lower and weaker correlations than the glaucoma group. Conclusions. Peripapillary RNFL thickness measured with Cirrus OCT showed mild to moderate correlations with SAP in glaucoma patients. Beatriz Abadia, Antonio Ferreras, Pilar Calvo, Mirian Ara, Blanca Ferrandez, Sofia Otin, Paolo Frezzotti, Luis E. Pablo, and Michele Figus Copyright © 2014 Beatriz Abadia et al. All rights reserved. Correlation of Choroidal Thickness and Volume Measurements with Axial Length and Age Using Swept Source Optical Coherence Tomography and Optical Low-Coherence Reflectometry Thu, 12 Jun 2014 11:20:14 +0000 http://www.hindawi.com/journals/bmri/2014/639160/ Purpose. To report choroidal thickness and volume in healthy eyes using swept source optical coherence tomography (SS-OCT). Methods. A prospective observational study of 122 patients examined with swept source OCT (DRI-OCT, Topcon, Japan). In each eye, we performed 256 horizontal scans, 12 mm in length and centered on the fovea. We calculated choroidal thickness manually with a built-in caliper and automatically using DRI-OCT mapping software. Choroidal volume was also automatically calculated. We measured axial length with optical low-coherence reflectometry (Lenstar LS 900, Haag-Streit, Switzerland). Results. The choroid has focally increased thickness under the fovea. Choroid was thinnest in the outer nasal quadrant. In stepwise regression analysis, age was estimated as the most significant factor correlating with decreased choroidal thickness followed by axial length . Refractive error was not statistically significant . Conclusions. SS-OCT is the first commercially available system that can automatically create choroidal thickness and volume maps. Choroidal thickness is increased at the fovea and is thinnest nasally. Age and axial length are critical for the estimation of choroidal thickness and volume. Choroidal measurements derived from SS-OCT images have potential value for objectively documenting disease-related choroidal thickness abnormalities and monitoring progressive changes over time. Janusz Michalewski, Zofia Michalewska, Zofia Nawrocka, Maciej Bednarski, and Jerzy Nawrocki Copyright © 2014 Janusz Michalewski et al. All rights reserved. Outcome of Corneal Collagen Crosslinking for Progressive Keratoconus in Paediatric Patients Wed, 11 Jun 2014 10:03:10 +0000 http://www.hindawi.com/journals/bmri/2014/140461/ Purpose. To evaluate the efficacy of corneal collagen crosslinking for progressive keratoconus in paediatric patients. Methods. This prospective study included 25 eyes of 18 patients (aged 18 years or younger) who underwent collagen crosslinking performed using riboflavin and ultraviolet-A irradiation (370 nm, 3 mW/cm2, 30 min). Results. The mean patient age was 14.3 ± 2.4 years (range 8–17) and mean followup duration was 20.1 ± 14.25 months (range 6–48). Crosslinked eyes demonstrated a significant reduction of keratometry values. The mean baseline simulated keratometry values were 46.34 dioptres (D) in the flattest meridian and 50.06 D in the steepest meridian. At 20 months after crosslinking, the values were 45.67 D () and 49.34 D (), respectively. The best spectacle corrected visual acuity (BSCVA) and topometric astigmatism improved after crosslinking. Mean logarithm of the minimum angle of resolution (logMAR) BSCVA decreased from 0.24 to 0.21 () and topometric astigmatism reduced from mean 3.50 D to 3.25 D (). Conclusions. Collagen crosslinking using riboflavin and ultraviolet-A is an effective treatment option for progressive keratoconus in paediatric patients. Crosslinking stabilises the condition and, thus, reduces the need for corneal grafting in these young patients. Deepa Viswanathan, Nikhil L. Kumar, and John J. Males Copyright © 2014 Deepa Viswanathan et al. All rights reserved. Silicone Oil: Different Physical Proprieties and Clinical Applications Wed, 11 Jun 2014 09:27:13 +0000 http://www.hindawi.com/journals/bmri/2014/502143/ Silicone oils are important tools in vitreoretinal surgery because they have the ability to displace aqueous humor from the retinal surface, maintaining the adhesion between retina and retinal pigment epithelium. To understand this capability, it is important to know the silicone oil characteristics. Herein, we report first on the main chemical-physical proprieties and then we review the clinical applications of the current silicone oil which is lighter than water with particular reference to their indications with small gauge vitrectomy. Finally, we describe the surgical techniques to inject and remove this type of silicone oil. In the summary of this paper, we explain why silicone oils are today increasingly used and why their introduction has improved the prognosis of several retinal diseases. In fact, having different types of silicone oils allows us to choose the appropriate endotamponade for every single case. Francesco Barca, Tomaso Caporossi, and Stanislao Rizzo Copyright © 2014 Francesco Barca et al. All rights reserved. Microincision Vitrectomy Surgery in Vitreomacular Traction Syndrome of Retinitis Pigmentosa Patients Mon, 09 Jun 2014 13:07:31 +0000 http://www.hindawi.com/journals/bmri/2014/537081/ Purpose. To investigate long-term retinal changes after microincision pars plana vitrectomy surgery (MIVS) and internal limiting membrane (ILM) peeling outcome in retinitis pigmentosa (RP) patients affected by vitreomacular traction syndrome (VMT) with higher vitreous surface adhesion or coexisting epiretinal membrane (ERM). Methods. Eight RP patients suffering from VMT were evaluated by means of best corrected visual acuity (BCVA), anterior and posterior binocular examination, spectral-domain optical coherence tomography (SD-OCT), MP-1 microperimetry (MP-1), and full-field electroretinogram (ERG), before MIVS and ILM peeling and during the 36-month follow-up. Patients were hospitalized for two days after the surgery. Surgical procedure was performed following this schedule: surgical removal of crystalline lens (MICS), MIVS with 23-gauge sutureless system trocars, core vitreous body removal, and balanced-sterile-salin-solution- (BSS-) air-gas (SF6) exchange. Results. All patients presented visual acuity (VA) increase after MIVS. None of the patients developed ocular hypertension or vitreomacular adhesions during the 3-year follow-up. MP-1 bivariate contour ellipse area (BCEA) was reduced in its dimensions and improved in all patients demonstrating a better fixation. Conclusions. MIVS could be the gold standard therapy in RP patients with VMT and higher vitreous surface adhesion or coexisting ERM if medical therapy is not applicable or not effective. Enzo Maria Vingolo, Emanuele Gerace, Stefano Valente, Leopoldo Spadea, and Marcella Nebbioso Copyright © 2014 Enzo Maria Vingolo et al. All rights reserved. Trehalose-Based Eye Drops Preserve Viability and Functionality of Cultured Human Corneal Epithelial Cells during Desiccation Sun, 08 Jun 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/292139/ This paper presents the evaluation of cytoprotective ability of trehalose-based eye drops in comparison with commercially available preparations during the experimental desiccation of cultured human corneal epithelial cells. Cultured human corneal epithelial cells (hCEC) underwent incubation with 7 different, commercially available medicaments used commonly in dry eye syndrome treatment, followed by desiccation trial performed on air under the flow hood for 5, 15, 30, and 45 minutes. Cell viability was quantified by live/dead fluorescent assay, while the presence of apoptotic cells was estimated by immunofluorescent staining for active caspase 3 protein. The preservation of membrane functions was evaluated using neutral red staining, while the preservation of proper morphology and phenotype was determined by fluorescent staining for actin filaments, nuclei, and p63 protein. The trehalose-based eye drops showed the highest efficiency in prevention of cell death from desiccation; moreover, this preparation preserved the normal cellular morphology, functions of cell membrane, and proliferative activity more effectively than other tested medicaments. Aneta Hill-Bator, Marta Misiuk-Hojło, Krzysztof Marycz, and Jakub Grzesiak Copyright © 2014 Aneta Hill-Bator et al. All rights reserved. Vitreous Tamponades in Highly Myopic Eyes Mon, 02 Jun 2014 11:05:24 +0000 http://www.hindawi.com/journals/bmri/2014/420380/ The use of endotamponade agents has gained a major role in the management of macular complications of high myopia. Myopic foveoschisis and macular hole are the main macular complication of pathologic myopia, this growing condition that is a main cause of visual loss, especially in patients at a younger age. We discuss the physical properties and advantages and disadvantages of the main ocular tamponade agents used in the treatment of these diseases. X. Valldeperas and J. Lorenzo-Carrero Copyright © 2014 X. Valldeperas and J. Lorenzo-Carrero. All rights reserved. Comparison of Anterior Segment Measurements Obtained by Three Different Devices in Healthy Eyes Mon, 02 Jun 2014 06:35:43 +0000 http://www.hindawi.com/journals/bmri/2014/498080/ Purpose. To assess the normal values and the repeatability of the Galilei Dual Scheimpflug Analyzer (GDSA), the biometer IOL Master, and the autokerato/refractometer WAM 5500 in anterior segment examinations. Methods. Eighty-eight eyes from 88 healthy volunteers were prospectively and consecutively recruited. The repeatability was assessed, calculating the intraclass correlation coefficient (ICC). Results. The correlations among the repeated measurements showed nearly perfect reliability (ICC > 0.81) for all of the parameters, except corneal astigmatism Galilei (0.79) and WAM (0.68). There were statistically significant differences () between the values of the flat simulated keratometry (SimK) and the steep SimK measured by GDSA and the other methods; however, there were no statistically significant differences for the values obtained with the IOL Master and WAM 5500 ( and , resp.) or between the values of the ACD () and WTW () measured by the IOL Master and GDSA. Conclusions. The anterior segment measurements from the IOL Master and WAM 5500 were highly repeatable, comparable, and well correlated. In healthy young persons, the evaluated parameters had very good repeatability, although significant differences were found between the GDSA and IOL Master and between the GDSA and WAM 5500. Carmen Lopez de la Fuente, Ana Sanchez-Cano, Francisco Segura, and Isabel Pinilla Copyright © 2014 Carmen Lopez de la Fuente et al. All rights reserved. Effect of Biometric Characteristics on the Change of Biomechanical Properties of the Human Cornea due to Cataract Surgery Thu, 29 May 2014 09:35:41 +0000 http://www.hindawi.com/journals/bmri/2014/628019/ Purpose. To determine the impact of biometric characteristics on changes of biomechanical properties of the human cornea due to standard cataract surgery using biomechanical analysis. Patients and Methods. This prospective consecutive cross-sectional study comprised 54 eyes with cataract in stages I or II that underwent phacoemulsification and IOL implantation. CH, CRF, IOPg, and IOPcc intraocular pressure were measured by biomechanical analysis preoperatively and at 1 month postoperatively. Changes () were calculated as preoperative value versus postoperative value. Biometrical data were extracted from TMS-5 (CSI and SAI), IOLMaster (AL), and EM-3000 (CCT and ECC) preoperatively. Results. The average values of the changes were  mmHg,  mmHg,  mmHg, and  mmHg. The higher the CSI the smaller the decrease in CH (, ). The higher the CCT the larger the decrease in CRF (, ). The higher the AL the smaller the decrease in IOPg (, ). The higher the AL, SAI, and EEC the smaller the decrease in IOPcc (, ; , ; , ). Conclusions. Corneal biomechanical properties were affected by comprehensive factors after cataract surgery, including corneal endothelium properties, biometry, and geometrical characteristics. Xuefei Song, Achim Langenbucher, Zisis Gatzioufas, Berthold Seitz, and Moatasem El-Husseiny Copyright © 2014 Xuefei Song et al. All rights reserved. Differential Effects of Dry Eye Disorders on Metabolomic Profile by 1H Nuclear Magnetic Resonance Spectroscopy Wed, 21 May 2014 13:15:35 +0000 http://www.hindawi.com/journals/bmri/2014/542549/ We used 1H NMR spectroscopy to analyze the metabolomic profile of reflex tears from patients with dry eye disorders (DEDs). 90 subjects were divided into 2 groups: (1) patients with DEDs (DEDG; ) and (2) healthy subjects (CG; ). Additionally, the DEDG was subdivided into 2 subgroups based on DED severity: mild-to-moderate and moderate ( and , resp.). Personal interviews and systematized ophthalmologic examinations were carried out. Reflex tears (20–30 μL) were collected by gently rubbing in the inferior meniscus of both eyelids with a microglass pipette and stored at −80°C until analysis. NMR spectra were acquired using a standard one-dimensional pulse sequence with water suppression. Data were processed and transferred to MATLAB for further chemometric analysis. Main differences in tear composition between DEDG and CG were found in cholesterol, N-acetylglucosamine, glutamate, creatine, amino-n-butyrate, choline, acetylcholine, arginine, phosphoethanolamine, glucose, and phenylalanine levels. This metabolic fingerprint helped also to discriminate between the three additional subgroups of DEDG. Our results suggest that tear metabolic differences between DEDG and CG identified by NMR could be useful in understanding ocular surface pathogenesis and improving biotherapy. Carmen Galbis-Estrada, Sebastián Martinez-Castillo, José M. Morales, Bárbara Vivar-Llopis, Daniel Monleón, Manuel Díaz-Llopis, and María Dolores Pinazo-Durán Copyright © 2014 Carmen Galbis-Estrada et al. All rights reserved. Human Aqueous Humor Levels of TGF-β2: Relationship with Axial Length Tue, 20 May 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/258591/ Purpose. To analyze the relationship between transforming growth factor-beta 2 (TGF-β2) levels in the anterior chamber aqueous humor and axial length of patients with myopia. Methods. TGF-β2 was measured with the Luminex xMAP Technology by using commercially available Milliplex xMAP Kits. Sixty-five aqueous humor samples were collected during cataract or clear lens extraction surgery and TGF-β2 levels in these specimens were analyzed. According to the axial length, the samples were divided into three groups: A (AL  mm), B (24~29 mm), and C (AL ≥ 29 mm). Results. Aqueous humor samples were analyzed from subjects with an average age of 67.0 ± 11.7 years. Mean TGF-β2 concentration of all aqueous samples was 422.2 ± 258.8 pg/mL. TGF-β2 concentration in group C (543 ± 317 pg/mL) was significantly greater than that in group A (390 ± 212 pg/mL) and group B (337 ± 217 pg/mL). The concentration of TGF-β2 was positively correlated with axial length ( = 0.308, = 0.013). Conclusions. TGF-β2 is likely to be acting as a critical factor in axial elongation and development of myopia. Yan Jia, Dan-Ning Hu, and Jibo Zhou Copyright © 2014 Yan Jia et al. All rights reserved. Analysis of the Time and Location of the Silicone Oil Emulsification by Spectral-Domain Optical Coherence Tomography after Silicone Oil Tamponade Mon, 19 May 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/372045/ Purpose. To estimate localization and the period up to the appearance of small hyperreflective round-shaped droplets using spectral-domain optical coherence tomography (SD-OCT) after pars plana vitrectomy with silicone oil tamponade. Methods. A retrospective observational study included 24 patients who had undergone pars plana vitrectomy with silicone oil tamponade for proliferative vitreoretinopathy (PVR) retinal detachment. SD-OCT analysis was performed 1, 3, and 6 months after surgery. We characterized the emulsified silicone oil in the SD-OCT as the small hyperreflective round-shaped droplets. Results. In SD-OCT examination, none of the patients had hyperreflective round-shaped droplets visible one month after vitrectomy with silicone oil tamponade. The hyperreflective droplets were found three months after surgery—in one patient above the optic nerve and in five patients intraretinally (in the cystoid spaces). Six months after vitrectomy, the hyperreflective round-shaped droplets were still present in the aforementioned patients' eyes and additionally in 3 eyes above the optic disc. Conclusions. Hyperreflective round-shaped droplets were found in a SD-OCT examination 3 months after silicone oil tamponade. The authors suggest that they are most likely the emulsified silicone oil droplets. The authors hypothesize that emulsification and migration of silicone oil begin within 3 months after surgery. Dominik Odrobina and Iwona Laudańska-Olszewska Copyright © 2014 Dominik Odrobina and Iwona Laudańska-Olszewska. All rights reserved. Comprehensive Detection, Grading, and Growth Behavior Evaluation of Subthreshold and Low Intensity Photocoagulation Lesions by Optical Coherence Tomographic and Infrared Image Analysis Mon, 12 May 2014 07:00:20 +0000 http://www.hindawi.com/journals/bmri/2014/492679/ Purpose. To correlate the long-term clinical effect of photocoagulation lesions after 6 months, as measured by their retinal damage size, to exposure parameters. We used optical coherence tomographic (OCT)-based lesion classes in order to detect and assess clinically invisible and mild lesions. Methods. In this prospective study, 488 photocoagulation lesions were imaged in 20 patients. We varied irradiation diameters (100/300 µm), exposure-times (20–200 ms), and power. Intensities were classified in OCT images after one hour, and we evaluated OCT and infrared (IR) images over six months after exposure. Results. For six consecutive OCT-based lesion classes, the following parameters increased with the class: ophthalmoscopic, OCT and IR visibility rate, fundus and OCT diameter, and IR area, but not irradiation power. OCT diameters correlated with exposure-time, irradiation diameter, and OCT class. OCT classes discriminated the largest bandwidth of OCT diameters. Conclusion. OCT classes represent objective and valid endpoints of photocoagulation intensity even for “subthreshold” intensities. They are suitable to calculate the treated retinal area. As the area is critical for treatment efficacy, OCT classes are useful to define treatment intensity, calculate necessary lesion numbers, and universally categorize lesions in clinical studies. Stefan Koinzer, Amke Caliebe, Lea Portz, Mark Saeger, Yoko Miura, Kerstin Schlott, Ralf Brinkmann, and Johann Roider Copyright © 2014 Stefan Koinzer et al. All rights reserved. Visual and Anatomical Outcomes of Intravitreal Aflibercept for Treatment-Resistant Neovascular Age-Related Macular Degeneration Wed, 07 May 2014 14:42:37 +0000 http://www.hindawi.com/journals/bmri/2014/273754/ A retrospective chart review of patients with persistent subretinal and/or intraretinal fluid, despite previous treatment with intravitreal ranibizumab (0.5 mg), who were switched to aflibercept injections, was performed. Treatment was three monthly aflibercept (2 mg) injections followed by dosing on pro re nata basis. Main outcome measures included changes in best corrected visual acuity (BCVA), 1 mm central subfield (CSF) retinal thickness, the height of the pigment epithelial detachment (PED), and subfoveal choroidal thickness on optical coherence tomography at 6 months. Thirty-one eyes of 30 patients were analyzed. The mean number of injections before aflibercept conversion was 34.4 ± 11.9. After an average of 4.5 aflibercept injections (range 3 to 6) over 6 months, no significant change in BCVA was observed (). Compared with baseline, there was a significant reduction of the CSF retinal thickness (449 ± 179 versus 269 ± 145 μm, ), maximum PED height (262 ± 134 versus 183 ± 100 μm, ), and choroidal thickness (192 ± 67 versus 167 ± 51 μm, ). Stable visual acuity and anatomical improvement were obtained for up to 6 months after aflibercept conversion. However, choroidal thinning related to treatment was observed. Magda Gharbiya, Ludovico Iannetti, Francesco Parisi, Umberto De Vico, Maria Laura Mungo, and Marco Marenco Copyright © 2014 Magda Gharbiya et al. All rights reserved. Vitreous Substitutes: The Present and the Future Sun, 04 May 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/351804/ Vitreoretinal surgery has advanced in numerous directions during recent years. The removal of the vitreous body is one of the main characteristics of this surgical procedure. Several molecules have been tested in the past to fill the vitreous cavity and to mimic its functions. We here review the currently available vitreous substitutes, focusing on their molecular properties and functions, together with their adverse effects. Afterwards we describe the characteristics of the ideal vitreous substitute. The challenges facing every ophthalmology researcher are to reach a long-term intraocular permanence of vitreous substitute with total inertness of the molecule injected and the control of inflammatory reactions. We report new polymers with gelification characteristics and smart hydrogels representing the future of vitreoretinal surgery. Finally, we describe the current studies on vitreous regeneration and cell cultures to create new intraocular gels with optimal biocompatibility and rheological properties. Simone Donati, Simona Maria Caprani, Giulia Airaghi, Riccardo Vinciguerra, Luigi Bartalena, Francesco Testa, Cesare Mariotti, Giovanni Porta, Francesca Simonelli, and Claudio Azzolini Copyright © 2014 Simone Donati et al. All rights reserved. Repeatability of Ocular Measurements with a Dual-Scheimpflug Analyzer in Healthy Eyes Thu, 24 Apr 2014 09:42:58 +0000 http://www.hindawi.com/journals/bmri/2014/808646/ Purpose. To assess the repeatability of the Galilei dual Scheimpflug analyzer (GDSA) in anterior segment examination. Methods. Fifty-two eyes from 52 healthy volunteers were prospectively and consecutively recruited. Anatomic, axial, refractive, and instantaneous parameters were measured with GDSA to provide a complete characterization of the anterior segment. Repeatability was assessed calculating intraclass correlation coefficient (ICC), and coefficient of variation (COV). Results. Correlation among repeated measurements showed almost perfect reliability (ICC > 0.81) for all parameters except thinnest central corneal thickness (CCT) (0.78), corneal thickness average out (0.79), and posterior axial curvature average out (0.60). Repeatability was excellent (COV 10%) for all parameters except anterior chamber volume and, superior iridocorneal angle and eccentricities. In these last three parameters, repeatability limits were excessively high compared to the mean. Conclusions. GDSA in healthy young persons had an almost perfect correlation in measuring anatomic, axial, instantaneous, and refractive parameters with greater variability for peripheral terms. Repeatability of anatomical parameters like pachymetry, anterior chamber, or iridocorneal angle and eccentricity were limited. In healthy young persons, the other evaluated parameters had very good repeatability and their limits of agreement showed excellent clinical results for this device. Carmen Lopez de la Fuente, Ana Sanchez-Cano, Francisco Segura, Lorena Fuentes-Broto, and Isabel Pinilla Copyright © 2014 Carmen Lopez de la Fuente et al. All rights reserved. Heavy Silicone Oil as a Long-Term Endotamponade Agent for Complicated Retinal Detachments Tue, 15 Apr 2014 12:48:20 +0000 http://www.hindawi.com/journals/bmri/2014/136031/ We retrospectively evaluated a heavy silicone oil (HSO) as a long-term intraocular endotamponade agent to treat complicated RD by inferior PVR in 25 eyes of 25 patients. Patients underwent PPV and injection of Oxane HD as an internal tamponade agent. A comparison of preoperative and postoperative BCVA at month 1, month 6, and last visit was made in the group in which HSO was removed and in the group in which HSO was not removed. Statistical calculations were performed using the Wilcoxon test. The HSO was removed from 11 patients after a mean of 26.55 ± 21.38 months. The HSO remained inside the vitreous cavity in 14 eyes due to a high chance of PVR recurrence (mean follow-up period, 11.07 ± 7.44 months). Anatomic success was achieved in 92%. The BCVA in the group, in which HSO was not removed, improved significantly during the first 6 months. Among the patients who had the oil removed, there was improvement in BCVA after 1 month. Oil emulsification was the most common adverse effect in 52% of eyes. HSO is an effective tamponade in complex rhegmatogenous and tractional RD complicated by PVR. HSO can remain in the eye for long periods with relative tolerability and safety. Juliana Prazeres, Octaviano Magalhães Jr., Luiz F. A. Lucatto, Rodrigo Milan Navarro, Nilva S. Moraes, Michel E. Farah, André Maia, and Maurício Maia Copyright © 2014 Juliana Prazeres et al. All rights reserved. Clinical Observations and Occurrence of Complications following Heavy Silicone Oil Surgery Mon, 14 Apr 2014 17:19:30 +0000 http://www.hindawi.com/journals/bmri/2014/706809/ Purpose. To demonstrate development and complications in heavy silicone oil (HSO) surgery in 100 eyes following primary vitreoretinal surgery. Methods. 100 eyes were included in this retrospective study that underwent vitreoretinal surgery using HSO as endotamponade. Indication diagnoses were retinal detachments , complicated macular holes (MH) , and others . HSO removal was performed after a mean period of 20.2 ± 19.0 weeks. In 18 eyes with poor functional prognosis the silicone oil remained permanently for stabilisation. Overall follow-up time was 35.9 ± 51.8 weeks. Results. The mean IOP before HSO surgery was 13.3 ± 5.6 mmHg and raised to an average maximum of 23.3 ± 8.5 mmHg postoperatively and decreased to 13.7 ± 7.2 mmHg after removal. Secondary IOP raise due to emulsification of the silicone oil endotamponade was seen in 29 eyes after 7.8 ± 4.5 weeks. Other complications being observed with HSO installed were persistent corneal erosion and prolonged anterior chamber inflammation . In 13 eyes recurrent retinal detachments occurred during followup. Conclusions. According to our analysis HSO surgery might deliver satisfying results in complicated cases of ophthalmological surgery. However, potential complications should always be taken into account when making the decision if to use and when to remove HSO in complicated retinal surgery. Hendrik Schwarzer, Babac Mazinani, Niklas Plange, Matthias Fuest, Peter Walter, and Gernot Roessler Copyright © 2014 Hendrik Schwarzer et al. All rights reserved. Selective Laser Trabeculoplasty for Glaucoma Secondary to Emulsified Silicone Oil after Pars Plana Vitrectomy: A Pilot Study Sun, 13 Apr 2014 17:06:33 +0000 http://www.hindawi.com/journals/bmri/2014/469163/ Background. To investigate the efficacy of selective laser trabeculoplasty (SLT) for lowering intraocular pressure (IOP) in patients with open angle glaucoma (OAG) secondary to emulsified silicone oil (SO). Methodology/Principal Findings. Prospective, interventional, consecutive case series of 11 eyes with sustained elevation of IOP after SO removal. The mean IOP at baseline, week 1, month 1, month 3, and month 6 was evaluated. The mean baseline IOP was significantly decreased from 25 ± 2.7 mmHg to 18.4 ± 5.5 mmHg at week 1 , 17.9 ± 3.1 mmHg at month 1 , 15.8 ± 3.9 mmHg at month 3 , and 16.2 ± 4.7 mmHg at month 6 . IOP < 21 mmHg was achieved in 91% of the eyes without a significant complication at month 6. Conclusion/Significance. SLT may be successful for lowering IOP in patients with OAG secondary to emulsified SO which was not controlled with maximum antiglaucomatous medical treatment. Zeynep Alkin, Banu Satana, Abdullah Ozkaya, Berna Basarir, Cigdem Altan, Ahmet Taylan Yazici, and Ahmet Demirok Copyright © 2014 Zeynep Alkin et al. All rights reserved. Reproducibility of the Optical Biometer OA-1000 (Tomey) Thu, 10 Apr 2014 14:09:57 +0000 http://www.hindawi.com/journals/bmri/2014/814761/ Aim. The OA-1000 (Tomey, Japan) is a new optical biometer, which measures axial length (AL), anterior chamber depth (ACD), and central corneal thickness (CT) utilizing optical interference technology. The aim of this study was to prove the reproducibility which is considered fundamental for other clinical investigations. Methods. 55 healthy volunteers were enrolled in this study. For each measurement of AL, ACD, and CT the biometer is grabbing a sequence of 10 shots and mean value (mean) and standard deviation (SD) are displayed. Five consecutive measurements were performed and average and standard deviation were assessed. Cronbach’s was derived as a quality measure for reproducibility. Results. For AL measurement Cronbach’s was 1.000, for CT 0.999, and for ACD 0.979, respectively. Mean value for AL was  mm, for ACD it was  mm, and for CT it was  μm, respectively. Standard deviation for AL was  mm, for ACD  mm, and for CT  μm. One correlation was found between mean values for AL and ACD (, ); no other correlations were found between mean values or values of standard deviation of AL, ACD, or CT. Conclusion. The OA-1000 shows an excellent reproducibility for measurement of AL, ACD, and CT and can be used in clinical practice. Susanne Christiane Goebels, Berthold Seitz, and Achim Langenbucher Copyright © 2014 Susanne Christiane Goebels et al. All rights reserved. Perfluorocarbon Liquid: Its Application in Vitreoretinal Surgery and Related Ocular Inflammation Sun, 30 Mar 2014 10:59:33 +0000 http://www.hindawi.com/journals/bmri/2014/250323/ The application of perfluorocarbon liquids has been well acclaimed in vitreoretinal surgery. Its unique physical properties make it an ideal intraoperative tool to improve the efficiency and safety of surgical procedures in complicated cases. The main functions of perfluorocarbon liquids in vitreoretinal surgery include relocating and fixing the detached retina, displacing the subretinal and subchoroidal to fluid anteriorly, revealing proliferative vitreous retinopathy (PVR) for further maneuvers, protecting the macula from exposure to chemicals with potential toxicity, and assisting the removal of foreign body. The related clinical applications include retinal detachment with severe proliferative vitreoretinopathy, giant tear, diabetic retinopathy (DR), retinopathy of prematurity (ROP), and posterior dislocated crystalline and intraocular lenses. The application of perfluorocarbon liquids has been expended over the past fewer years. Several PFCLs related ocular inflammations have been observed in in vitro studies, animal studies, and clinical follow-up. The complete removal of PFCLs is recommended at the end of the surgery in most cases. Qi Yu, Kun Liu, Li Su, Xin Xia, and Xun Xu Copyright © 2014 Qi Yu et al. All rights reserved. Effect of Intraocular Lens Diameter Implanted in Enucleated Porcine Eye on Intraocular Pressure Induced by Scleral Depression Thu, 27 Mar 2014 13:38:06 +0000 http://www.hindawi.com/journals/bmri/2014/586060/ The effect of the diameter of an intraocular lens (IOL) implanted in enucleated porcine eyes on the intraocular pressure induced by scleral depression was investigated. Two IOLs of 6 mm and 7 mm optic diameter were implanted. The intraocular pressure (IOP) was monitored during scleral depression by a transducer placed in the midvitreous through a sclerotomy at 6 o’clock. The area under the curve (AUC) of the IOP changes from the beginning of the indentation to the point when the peripheral retinal surface was observed through the IOL optics was measured. The AUC was significantly larger in eyes with a 6 mm IOL than in eyes with a 7 mm IOL (). The IOP elevation at the endpoint was higher in eyes with the 6 mm IOL than in eyes with the 7 mm IOL. We conclude that the AUC may represent the degree of stress induced by scleral depression. The higher AUC value with the X-60 may be because of the longer distance from the peripheral retina to the edge of the IOL optics. Gaku Terauchi, Celso Soiti Matsumoto, Kei Shinoda, Harue Matsumoto, and Atsushi Mizota Copyright © 2014 Gaku Terauchi et al. All rights reserved. Using Surgical Microscope for Sclera Buckling and Transscleral Cryopexy: An Alternative Procedure of Treatment for Rhegmatogenous Retinal Detachment Thu, 27 Mar 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/364961/ Purpose. To observe the long-term effectiveness of scleral buckling and transscleral cryopexy conducted under a surgical microscope in the treatment of uncomplicated rhegmatogenous retinal detachment. Methods. This was a retrospective analysis in a total of 227 consecutive patients (244 eyes) with uncomplicated rhegmatogenous retinal detachment (proliferative vitreoretinopathy ≤ C2). All patients underwent scleral buckling and transscleral cryopexy under a surgical microscope without using a binocular indirect ophthalmoscope or a contact lens. Results. After initial surgery, complete retinal reattachment was achieved in 226 eyes (92.6%), and retinal redetachment developed in 18 eyes (7.4%). The causes of retinal redetachment included presence of new breaks in eight eyes (44%), failure to completely seal the breaks in five eyes (28%), missed retinal breaks in four eyes (22%), and iatrogenic retinal breaks in one eye (6%). Scleral buckling surgery was performed again in 12 eyes (66%). Four eyes (22%) developed proliferative vitreoretinopathy and then were treated by vitrectomy. The sealing of retinal breaks and complete retinal reattachment were achieved in 241 eyes (98.8%). Conclusion. Probably because of clear visualization of retinal breaks and being controllable under a surgical microscope, the microsurgery of scleral buckling and transscleral cryopexy for uncomplicated retinal detachment exhibits advisable effectiveness. Liu-xue-ying Zhong, Yi Du, Wen Liu, Su-Ying Huang, and Shao-chong Zhang Copyright © 2014 Liu-xue-ying Zhong et al. All rights reserved. Inflammation Induced by Perfluorocarbon Liquid: Intra- and Postoperative Use Mon, 24 Mar 2014 16:29:08 +0000 http://www.hindawi.com/journals/bmri/2014/907816/ Perfluorocarbon liquids (PFCLs) are useful and safe surgical tools in vitreoretinal surgery. The use of PFCL as a tamponade has been controversial due to the corneal toxicity, retinal infiltration, and inflammatory reaction in experimental studies. Several authors have studied in humans the anatomical and functional outcome and adverse effects of perfluorocarbon liquids used as short-, medium-, and long-term tamponade. PFCLs develop dispersion a few days after injection and droplets may move into the anterior chamber and cause corneal endothelial damage. When PFCLs are used as postoperative tamponades for more than one week, a foreign-body inflammatory reaction is observed in up to 30% of cases but such a reaction does not induce PVR, and it resolves after removal of PFCLs. Although most clinical studies have found no signs of retinal toxicity such as progressive visual acuity deterioration or macular anatomical changes, few performed ERG or retinal histological analysis. Marta S. Figueroa and Diego Ruiz Casas Copyright © 2014 Marta S. Figueroa and Diego Ruiz Casas. All rights reserved. Dynamics of Blood Count after Rheohemapheresis in Age-Related Macular Degeneration: Possible Association with Clinical Changes Thu, 06 Mar 2014 13:19:57 +0000 http://www.hindawi.com/journals/bmri/2014/858219/ Background. Rheohemapheresis (RHF) is a method that can stop the activity of the dry form of age-related macular degeneration (AMD). The pathophysiologic mechanisms are not well understood, and the effects of the RHF procedures extend beyond the time of the individual procedures. Patients and Methods. We present the data for 46 patients with AMD treated with a series of 8 rheohemapheretic procedures. Blood count parameters were measured before the first and the last procedures. The clinical effect was judged by changes in the drusenoid pigment epithelium detachment (DPED) area before and after the rheopheretic sessions. Results. Rheopheresis caused a decrease in hemoglobin , a decrease in leukocytes , and an increase in platelets . We found a negative correlation between the amount of platelets and their volume (, Pearson correlation coefficient: −0.509). We identified the platelet/MPV ratio as a good predictor of the clinical outcome. Patients with a platelet/MPV ratio greater than 21.5 (before the last rheopheresis) had a significantly better outcome (, sensitivity of 76.9% and specificity of 80%). Conclusion. Several basic blood count parameters after RHF can be concluded to significantly change, with some of those changes correlating with the clinical results (reduction of the DPED area). Milan Košťál, Milan Bláha, Eva Rencová, Miriam Lánská, Pavel Rozsíval, Vera Kratochvilová, and Hana Langrová Copyright © 2014 Milan Košťál et al. All rights reserved. Erratum to “Topical 100% Serum Eye Drops for Treating Corneal Epithelial Defect after Ocular Surgery” Sun, 02 Feb 2014 13:03:38 +0000 http://www.hindawi.com/journals/bmri/2014/595973/ Kaevalin Lekhanont, Passara Jongkhajornpong, Lulin Choubtum, and Varintorn Chuckpaiwong Copyright © 2014 Kaevalin Lekhanont et al. All rights reserved. Comparison of Diagnostic Accuracy between Octopus 900 and Goldmann Kinetic Visual Fields Thu, 23 Jan 2014 11:53:22 +0000 http://www.hindawi.com/journals/bmri/2014/214829/ Purpose. To determine diagnostic accuracy of kinetic visual field assessment by Octopus 900 perimetry compared with Goldmann perimetry. Methods. Prospective cross section evaluation of 40 control subjects with full visual fields and 50 patients with known visual field loss. Comparison of test duration and area measurement of isopters for Octopus 3, 5, and 10°/sec stimulus speeds. Comparison of test duration and type of visual field classification for Octopus versus Goldmann perimetry. Results were independently graded for presence/absence of field defect and for type and location of defect. Statistical evaluation comprised of ANOVA and paired t test for evaluation of parametric data with Bonferroni adjustment. Bland Altman and Kappa tests were used for measurement of agreement between data. Results. Octopus 5°/sec perimetry had comparable test duration to Goldmann perimetry. Octopus perimetry reliably detected type and location of visual field loss with visual fields matched to Goldmann results in 88.8% of results . Conclusions. Kinetic perimetry requires individual tailoring to ensure accuracy. Octopus perimetry was reproducible for presence/absence of visual field defect. Our screening protocol when using Octopus perimetry is 5°/sec for determining boundaries of peripheral isopters and 3°/sec for blind spot mapping with further evaluation of area of field loss for defect depth and size. Fiona J. Rowe and Alison Rowlands Copyright © 2014 Fiona J. Rowe and Alison Rowlands. All rights reserved. Comparison of Riboflavin/Ultraviolet-A Cross-Linking in Porcine, Rabbit, and Human Sclera Thu, 02 Jan 2014 11:30:29 +0000 http://www.hindawi.com/journals/bmri/2014/194204/ Purpose. To compare the biomechanical properties of porcine, rabbit, and human sclera before and after riboflavin/ultraviolet-A (UVA) collagen cross-linking (CXL). Methods. Eight rabbits, 8 porcine eyeballs, and 8 human eyeballs were included. One rabbit eye and half of each bisected human and porcine eyeball were treated with riboflavin/UVA CXL. Untreated fellow rabbit eyes and eyeball halves served as controls. A 10 mm × 20 mm scleral band was harvested from each specimen. From this band, two 3.5 mm × 15.0 mm strips were prepared for biomechanical testing. The biomechanical parameters were ultimate stress, stress and Young’s modulus. Results. Values of stress, and Young’s modulus showed that human sclera was 4 times stiffer than porcine sclera and 3 times stiffer than rabbit sclera. In rabbit sclera, both the stress and Young’s modulus were significantly increased by CXL (). In porcine sclera, only the ultimate stress was significantly increased by CXL (). The biomechanical properties of human sclera were not statistically affected by CXL (). Conclusions. Human sclera has higher biomechanical stiffness than porcine and rabbit sclera. With the same irradiation dose, riboflavin/UVA CXL increases the biomechanical stiffness of rabbit sclera but not porcine or human sclera. Yali Zhang, Zhiwei Li, Lei Liu, Xuguang Han, Xiaomin Zhao, and Guoying Mu Copyright © 2014 Yali Zhang et al. All rights reserved. High-Resolution En Face Images of Microcystic Macular Edema in Patients with Autosomal Dominant Optic Atrophy Thu, 28 Nov 2013 10:55:30 +0000 http://www.hindawi.com/journals/bmri/2013/676803/ The purpose of this study was to investigate the characteristics of microcystic macular edema (MME) determined from the en face images obtained by an adaptive optics (AO) fundus camera in patients with autosomal dominant optic atrophy (ADOA) and to try to determine the mechanisms underlying the degeneration of the inner retinal cells and RNFL by using the advantage of AO. Six patients from 4 families with ADOA underwent detailed ophthalmic examinations including spectral domain optical coherence tomography (SD-OCT). Mutational screening of all coding and flanking intron sequences of the OPA1 gene was performed by DNA sequencing. SD-OCT showed a severe reduction in the retinal nerve fiber layer (RNFL) thickness in all patients. A new splicing defect and two new frameshift mutations with premature termination of the Opa1 protein were identified in three families. A reported nonsense mutation was identified in one family. SD-OCT of one patient showed MME in the inner nuclear layer (INL) of the retina. AO images showed microcysts in the en face images of the INL. Our data indicate that AO is a useful method to identify MME in neurodegenerative diseases and may also help determine the mechanisms underlying the degeneration of the inner retinal cells and RNFL. Kiyoko Gocho, Sachiko Kikuchi, Takenori Kabuto, Shuhei Kameya, Kei Shinoda, Atsushi Mizota, Kunihiko Yamaki, and Hiroshi Takahashi Copyright © 2013 Kiyoko Gocho et al. All rights reserved. Vignetting and Field of View with the KAMRA Corneal Inlay Wed, 13 Nov 2013 08:24:02 +0000 http://www.hindawi.com/journals/bmri/2013/154593/ Purpose. To evaluate the effect of the KAMRA corneal inlay on the retinal image brightness in the peripheral visual field. Methods. A KAMRA inlay was “implanted” into a theoretical eye model in a corneal depth of 200 microns. Corneal radius was varied to a steep, normal, and flat (7.37, 7.77, and 8.17 mm) version keeping the proportion of anterior to posterior radius constant. Pupil size was varied from 2.0 to 5.0 mm. Image brightness was determined for field angles from −70° to 70° with and without KAMRA and proportion of light attenuation was recorded. Results. In our parameter space, the attenuation in brightness ranges in between 0 and 60%. The attenuation in brightness is not affected by corneal shape. For large field angles where the incident ray bundle is passing through the peripheral cornea, brightness is not affected. For combinations of small pupil sizes (2.0 and 2.5 mm) and field angles of 20–40°, up to 60% of light may be blocked with the KAMRA. Conclusion. For combinations of pupil sizes and field angles, the attenuation of image brightness reaches levels up to 60%. Our theoretical findings have to be clinically validated with detailed investigation of this vignetting effect. Achim Langenbucher, Susanne Goebels, Nóra Szentmáry, Berthold Seitz, and Timo Eppig Copyright © 2013 Achim Langenbucher et al. All rights reserved. Long-Term Effects of Nilvadipine against Progression of the Central Visual Field Defect in Retinitis Pigmentosa: An Extended Study Tue, 12 Nov 2013 13:32:57 +0000 http://www.hindawi.com/journals/bmri/2013/585729/ Purpose. To assess the long-term effects of nilvadipine on the progression of central visual field defect in retinitis pigmentosa (RP). Methods. Patients with RP were randomly divided into a treated group receiving oral nilvadipine and a control group. Progression of RP was evaluated with MD slope and the average sensitivity of the central 2° (ΔCENT4). Results. The mean MD slopes were −0.55/−0.39 (right/left eyes, ) dB/year in the treated group and −1.37/−1.15 (right/left eyes, ) dB/year in the control group (, resp.). In both eyes, however, no statistical difference was observed between the two groups for the ΔCENT4 values. Conclusion. Although we confirmed that nilvadipine significantly retarded the progression of the average of MD value defects in the central 10°, it was not specific for the central 2° of the visual field in RP. Mitsuru Nakazawa, Yukihiko Suzuki, Tadashi Ito, Tomomi Metoki, Takashi Kudo, and Hiroshi Ohguro Copyright © 2013 Mitsuru Nakazawa et al. All rights reserved. Changes in Frequency-Doubling Perimetry in Patients with Type I Diabetes prior to Retinopathy Mon, 11 Nov 2013 16:08:54 +0000 http://www.hindawi.com/journals/bmri/2013/341269/ Purpose. To evaluate the ability of frequency-doubling technology (FDT) perimetry in detecting visual field defects in young adults with type I diabetes prior to retinopathy or with minor retinovascular changes. Methods. This comparative cross-sectional study included 30 healthy subjects and 73 age-matched patients with type I diabetes mellitus. All subjects underwent a full ocular examination including an FDT with the threshold C-20-5 strategy. Only one eye per subject was randomly included in the statistical analysis. FDT results and time to perform the test were compared between the groups. Results. The mean age was 27.1 years in the control group and 26.6 years in the diabetic group (). The mean period from the onset of diabetes was years, while minimal retinovascular changes were observed in 18 eyes. Mean deviation of FDT did not differ between the groups. Although global indices of FDT were within normal limits, pattern standard deviation of FDT was higher in the diabetic group (). The area under the receiver operating characteristic curve was 0.647 for pattern standard deviation of FDT (standard error = 0.052; ). Conclusion. FDT can detect retinal dysfunctions in diabetic patients prior to the onset of significant vascular complications. Isabel Pinilla, Antonio Ferreras, Miriam Idoipe, Ana I. Sanchez-Cano, Diana Perez-Garcia, Laura X. Herrera, Maria J. Pinilla, and Emilio Abecia Copyright © 2013 Isabel Pinilla et al. All rights reserved. Ocular Dominance and Visual Function Testing Mon, 11 Nov 2013 15:17:37 +0000 http://www.hindawi.com/journals/bmri/2013/238943/ Purpose. To show the distribution of ocular dominance as measured with sensory and eye sighting methods and its potential relationship with high and low contrast LogMAR visual acuity in presbyopic subjects. Method. Forty-four presbyopes (48.5 ± 3.5 years) participated in this study. Ocular dominance was determined by eye sighting (hole-in-card) and sensorial (+1.50 D lens induced blur) methods. According to the dominance detected with each method (RE: right eye or LE: left eye), patients were classified in dominance type 1 (RE/RE), type 2 (RE/LE), type 3 (LE/RE) and type 4 (LE/LE). Results. Baseline refractive error (MSE) was RE:−0.36 ± 1.67 D and LE:−0.35 ± 1.85 D (). RE was the dominant eye in 61.4% and 70.5% of times as obtained from sensorial and sighting methods, respectively. Most frequent dominance was of type 1 (52.3%), in this case the RE showed statistically significant better distance low contrast LogMAR VA (0.04 LogMAR units) compared to the LE (). Conclusions. The dominance was more frequent in RE in this sample. The eye sighting and sensorial methods to define ocular dominance agreed in more than half of cases. Amount of MSE was not significantly different between dominant and non-dominant eye. But in case of right dominance, the RE presented better distance low contrast VA compared to the LE. D. Lopes-Ferreira, H. Neves, A. Queiros, M. Faria-Ribeiro, S. C. Peixoto-de-Matos, and J. M. González-Méijome Copyright © 2013 D. Lopes-Ferreira et al. All rights reserved. Epiretinal Membranes in Patients with Uveitis: Morphological and Functional Analysis with Spectral Domain Optical Coherence Tomography Tue, 05 Nov 2013 10:40:10 +0000 http://www.hindawi.com/journals/bmri/2013/284821/ Purpose. To correlate the uveitic epiretinal membrane (ERM) features using spectral-domain optical coherence tomography (SD-OCT) with visual acuity (VA). Methods. Forty-one eyes of 32 patients were included in this retrospective study. SD-OCT was performed in all patients and data were collected at the time of ERM diagnosis and at the final visit. Both best corrected visual acuity (BCVA) and ERM thickness were correlated with the morphological and clinical features. Results. Final BCVA was positively correlated with male sex and the focal pattern of ERM attachment and negatively correlated with IS/OS photoreceptor junction disruption . BVCA change showed a positive correlation with the age of ERM onset but a negative correlation with IS/OS photoreceptor disruption at the ERM diagnosis and the increase of central subfield thickness (CST) . Final ERM thickness correlated with the duration of uveitis and the duration of ERM . During the follow-up, ERM thickening correlated with male sex , posterior uveitis , uveitis duration , and broad attachment pattern . Conclusions. In the uveitic ERM, VA negatively correlates with IS/OS photoreceptor junction disruption and the increase of CST. ERM thickness is influenced by longer duration of both uveitis and ERM. Ludovico Iannetti, Paolo Tortorella, Enzo D’Ambrosio, Rossela Spena, Roberta Zito, and Magda Gharbiya Copyright © 2013 Ludovico Iannetti et al. All rights reserved. Microscopic Evaluation, Molecular Identification, Antifungal Susceptibility, and Clinical Outcomes in Fusarium, Aspergillus and, Dematiaceous Keratitis Thu, 24 Oct 2013 09:39:46 +0000 http://www.hindawi.com/journals/bmri/2013/605308/ Purpose. Fusarium, Aspergillus, and Dematiaceous are the most common fungal species causing keratitis in tropical countries. Herein we report a prospective study on fungal keratitis caused by these three fungal species. Methodology. A prospective investigation was undertaken to evaluate eyes with presumed fungal keratitis. All the fungal isolates () obtained from keratitis infections were identified using morphological and microscopic characters. Molecular identification using sequencing of the ITS region and antifungal susceptibility tests using microdilution method were done. The final clinical outcome was evaluated in terms of the time taken for resolution of keratitis and the final visual outcome. The results were analyzed after segregating the cases into three groups, namely, Fusarium, Aspergillus, and Dematiaceous keratitis. Results. Diagnosis of fungal keratitis was established in 73 (35.9%) cases out of 208 cases. The spectra of fungi isolated were Fusarium spp. (26.6%), Aspergillus spp. (21.6%), and Dematiaceous fungi (11.6%). The sequence of the ITS region could identify the Fusarium and Aspergillus species at the species complex level, and the Dematiaceous isolates were accurately identified. Using antifungal agents such as fluconazole, natamycin, amphotericin B, and itraconazole, the minimum inhibitory concentrations (MICs) for Fusarium spp. were >32 μg/mL, 4–8 μg/mL, 0.5–1 μg/mL, and >32 μg/mL, respectively. Antifungal susceptibility data showed that Curvularia spp. was highly resistant to all the antifungal agents. Overall, natamycin and amphotericin B were found to be the most effective antifungal agents. The comparative clinical outcomes in all cases showed that the healing response in terms of visual acuity of the Dematiaceous group was significantly good when compared with the Fusarium and Aspergillus groups (). The time required for healing in the Fusarium group was statistically significantly less when compared with the Aspergillus and Dematiaceous groups. Conclusion. This study demonstrates important differences in microscopic features of scraping material and antifungal susceptibility between the three groups. Early and accurate identification coupled with the MIC data, and thereby appropriate treatment is crucial for complete recovery. Devarshi U. Gajjar, Anuradha K. Pal, Bharat K. Ghodadra, and Abhay R. Vasavada Copyright © 2013 Devarshi U. Gajjar et al. All rights reserved. How Ocular Surface Disease Impacts the Glaucoma Treatment Outcome Wed, 09 Oct 2013 15:19:30 +0000 http://www.hindawi.com/journals/bmri/2013/696328/ The treatment goals for glaucoma are lowering the intraocular pressure and preservation of vision. Topical hypotensive drops are the standard form of therapy which is often associated with some symptoms of toxicity, ocular inflammation, allergy, or ocular surface disease (OSD). OSD is a common comorbidity in glaucoma patients, and its prevalence with glaucoma increases with age. Use of topical treatment could additionally increase symptoms of OSD mostly due to preservatives added to multidose medication bottles used to reduce the risk of microbial contamination. This toxicity has been particularly associated with BAK, the most commonly used preservative which damages conjunctival and corneal epithelial cells and significantly aggravates OSD symptoms. OSD adversely affects patients’ quality of life causing discomfort and problems with vision which in turn may result in noncompliance, lack of adherence, and eventually visual impairment. In the management of glaucoma patients OSD symptoms should not be overlooked. If they are present, topical glaucoma treatment should be adapted by decreasing the amount of drops instilled daily, using BAK-free or preservative-free medication and lubricants if necessary. Awareness of the presence and importance of OSD will in turn improve patients' adherence and compliance and thus ultimately the preservation of long-term vision. Snježana Kaštelan, Martina Tomić, Kata Metež Soldo, and Jasminka Salopek-Rabatić Copyright © 2013 Snježana Kaštelan et al. All rights reserved. Repeatability and Reproducibility of Measurements Using a NT-530P Noncontact Tono/Pachymeter and Correlation of Central Corneal Thickness with Intraocular Pressure Tue, 08 Oct 2013 09:35:19 +0000 http://www.hindawi.com/journals/bmri/2013/370592/ Purpose. To investigate the repeatability and reproducibility of intraocular pressure (IOP) and central corneal thickness (CCT) measurements using a noncontact tono/pachymeter (NT-530P) and to assess the correlation of CCT with IOP. Methods. Forty-six eyes of healthy volunteers were measured by two examiners. Three consecutive measurements per eye were performed. Repeatability was assessed using the coefficient of variation, and reproducibility was assessed using Bland-Altman plots. Linear correlations were used to determine agreement between CCT and noncorrected IOP and CCT and corrected IOP, which was calculated using a formula built into the NT-530P. Results. The coefficient of variation for IOP was 6.4% and for CCT was 0.4%. The 95% limits of agreement between examiners were  mmHg (range: to 2.61 mmHg) for IOP,  μm (range: to 7.64 μm) for CCT. The corrected IOP was significantly higher than the noncorrected IOP (). The noncorrected IOP significantly correlated with CCT (, ). The corrected IOP showed no significant correlation with CCT (, ). Conclusions. NT-530P offered repeatability and reproducibility in both IOP and CCT measurements. The corrected IOP calculated using the NT-530P was independent of the CCT, suggesting that this IOP may be less influenced by the central corneal thickness. Fusako Fujimura, Kazutaka Kamiya, Kazuko Fujiwara, Nobuyuki Shoji, and Kimiya Shimizu Copyright © 2013 Fusako Fujimura et al. All rights reserved. A Comparison between Tube Surgery, ND:YAG Laser and Diode Laser Cyclophotocoagulation in the Management of Refractory Glaucoma Mon, 07 Oct 2013 16:16:07 +0000 http://www.hindawi.com/journals/bmri/2013/371951/ Purpose. To compare the results of intraocular pressure (IOP) reduction by 3 treatment modalities, (a) glaucoma tube implants, (b) noncontact YAG laser cyclophotocoagulation (cycloYAG), and (c) contact transscleral diode laser cyclophotocoagulation (cyclodiode), in cases of advanced glaucoma refractory to alternative treatments. Methods. A consecutive group of 45 eyes that received cycloYAG were matched against two control groups of patients who had received tube surgery or cyclodiode, each control group having been derived from a database of patients. Results. Mean pretreatment IOP improved from 41.3, 38.6, and 32.0 mmHg for the tube, cycloYAG, and cyclodiode groups, respectively, to 16.4, 22.1, and 19.3 mmHg, respectively. Treatment success was achieved in 78%, 69%, and 71% of the tube, cycloYAG, and cyclodiode groups, respectively. Visual acuity deteriorated 2 or more Snellen lines in 16%, 7%, and 9% of the patients in the tube, cycloYAG, and cyclodiode groups, respectively. Complications included retinal detachment, hypotony, and phthisis. Conclusions. All 3 methods provided acceptable IOP lowering in the short and medium term. Control of IOP was best in patients receiving tube surgery. Cyclodiode and cycloYAG treatments were similarly effective in lowering IOP. Tube surgery was associated with a greater incidence of sight threatening complications. Philip A. Bloom, Colin I. Clement, Anthony King, Baha Noureddin, Kamal Sharma, Roger A. Hitchings, and Peng T. Khaw Copyright © 2013 Philip A. Bloom et al. All rights reserved. Antioxidant Delivery Pathways in the Anterior Eye Thu, 26 Sep 2013 08:03:40 +0000 http://www.hindawi.com/journals/bmri/2013/207250/ Tissues in the anterior segment of the eye are particular vulnerable to oxidative stress. To minimise oxidative stress, ocular tissues utilise a range of antioxidant defence systems which include nonenzymatic and enzymatic antioxidants in combination with repair and chaperone systems. However, as we age our antioxidant defence systems are overwhelmed resulting in increased oxidative stress and damage to tissues of the eye and the onset of various ocular pathologies such as corneal opacities, lens cataracts, and glaucoma. While it is well established that nonenzymatic antioxidants such as ascorbic acid and glutathione are important in protecting ocular tissues from oxidative stress, less is known about the delivery mechanisms used to accumulate these endogenous antioxidants in the different tissues of the eye. This review aims to summarise what is currently known about the antioxidant transport pathways in the anterior eye and how a deeper understanding of these transport systems with respect to ocular physiology could be used to increase antioxidant levels and delay the onset of eye diseases. Ankita Umapathy, Paul Donaldson, and Julie Lim Copyright © 2013 Ankita Umapathy et al. All rights reserved. Plasticity in the Human Visual Cortex: An Ophthalmology-Based Perspective Wed, 25 Sep 2013 16:26:48 +0000 http://www.hindawi.com/journals/bmri/2013/568354/ Neuroplasticity refers to the ability of the brain to reorganize the function and structure of its connections in response to changes in the environment. Adult human visual cortex shows several manifestations of plasticity, such as perceptual learning and adaptation, working under the top-down influence of attention. Plasticity results from the interplay of several mechanisms, including the GABAergic system, epigenetic factors, mitochondrial activity, and structural remodeling of synaptic connectivity. There is also a downside of plasticity, that is, maladaptive plasticity, in which there are behavioral losses resulting from plasticity changes in the human brain. Understanding plasticity mechanisms could have major implications in the diagnosis and treatment of ocular diseases, such as retinal disorders, cataract and refractive surgery, amblyopia, and in the evaluation of surgical materials and techniques. Furthermore, eliciting plasticity could open new perspectives in the development of strategies that trigger plasticity for better medical and surgical outcomes. Andreia Martins Rosa, Maria Fátima Silva, Sónia Ferreira, Joaquim Murta, and Miguel Castelo-Branco Copyright © 2013 Andreia Martins Rosa et al. All rights reserved. Age-Related Changes in Trabecular Meshwork Imaging Thu, 19 Sep 2013 15:02:18 +0000 http://www.hindawi.com/journals/bmri/2013/295204/ Purpose. To evaluate the normal aging effects on trabecular meshwork (TM) parameters using Fourier domain anterior segment optical coherence tomography (ASOCT) images. Patients and Methods. One eye from 45 participants with open angles was imaged. Two independent readers measured TM area, TM length, and area and length of the TM interface shadow from 3 age groups (18–40, 41–60, and 61–80). Measurements were compared using stepwise regression analysis. Results. The average TM parameters were 0.0487 () mm2 for TM area, 0.5502 () mm for TM length, 0.1623 () mm2 for TM interface shadow area, and 0.7755 () mm for TM interface shadow length. Interobserver reproducibility coefficients ranged from 0.45 (TM length) to 0.82 (TM area). TM area and length were not correlated with age. While the TM interface shadow length did not correlate with age, the TM interface shadow area increased with age. Race, sex, intraocular pressure, and gonioscopy score were not correlated with any TM parameters. Conclusion. Although the TM measurements were not correlated with age, the TM interface shadow area increased with age. Further study is required to determine whether there is any relationship between the age-related ASOCT findings of the TM interface shadow area and physiologic function. Mark E. Gold, Seema Kansara, Kundandeep S. Nagi, Nicholas P. Bell, Lauren S. Blieden, Alice Z. Chuang, Laura A. Baker, Kimberly A. Mankiewicz, and Robert M. Feldman Copyright © 2013 Mark E. Gold et al. All rights reserved. Role of Color Doppler Imaging in Early Diagnosis and Prediction of Progression in Glaucoma Tue, 17 Sep 2013 11:46:23 +0000 http://www.hindawi.com/journals/bmri/2013/871689/ This longitudinal and prospective study analyzes the ability of orbital blood flow measured by color Doppler imaging (CDI) to predict glaucoma progression in patients with glaucoma risk factors. Patients with normal perimetry but having glaucoma risk factors and patients in the initial phase of glaucoma were prospectively included in the study and divided, after a five-year follow-up, into two groups: “Progression” and “No Progression” based on the changes in the Moorfields regression analysis (MRA) classification of Heidelberg retina tomograph (HRT). An orbital CDI was performed in all patients and the parameters obtained were correlated with changes in HRT. A logistic discrimination function (LDF) was calculated for ophthalmic artery (OA) and central retinal artery (CRA) parameters. Receiver operating characteristics curves (ROC) were used to assess the usefulness of LDFs to predict glaucomatous progression. A total of 71 eyes were included. End-diastolic velocity, time-averaged velocity, and resistive index in the OA and CRA were significantly different () between the Progression and No Progression groups. The area under the ROC curves calculated for both LDFs was of 0.695 (OA) and 0.624 (CRA). More studies are needed to evaluate the ability of CDI to perform early diagnosis and to predict progression in glaucoma in eyes. Fatima Jimenez-Aragon, Elena Garcia-Martin, Raquel Larrosa-Lopez, Jose M. Artigas-Martín, Pilar Seral-Moral, and Luis E. Pablo Copyright © 2013 Fatima Jimenez-Aragon et al. All rights reserved. Role of Rheum Polysaccharide in the Cytokines Produced by Peripheral Blood Monocytes in TLR4 Mediated HLA-B27 Associated AAU Mon, 16 Sep 2013 08:24:59 +0000 http://www.hindawi.com/journals/bmri/2013/431232/ Purpose. To evaluate the effect of a traditional Chinese medicine, Rheum Polysaccharide (RP), on the in vitro production of tumor necrosis factor alpha (TNF-α) and interleukin-10 (IL-10) by lipopolysaccharide- (LPS-)stimulated human monocytes from HLA-B27 associated acute anterior uveitis patients of convalescence stage. Method. PBMC samples were isolated from 10 HLA-B27 associated acute anterior uveitis, incubated, respectively, and divided into 4 groups as follows: (1) controls, PBS was added in final concentration of 1 mg·L−1, (2) stimulated by LPS, LPS was added in final concentration of 1 mg·L−1, (3) stimulated by LPS + HTA125, 30 minutes before the adding of LPS in final concentration of 1 mg·L−1, the final concentration of 5 mg·L−1 of the HTA125 was added, and (4) stimulated by LPS + RP, 30 minutes before the adding of LPS in final concentration 1 mg·L−1, the final concentration 100 mg·L−1 of the RP was added. Supernatants were used to quantify the amounts of TNF-α and IL-10 released in time course using enzyme-linked immunosorbent assay (ELISA). Result. After stimulated by lps, the concentrations of TNF-α and IL-10 in culture supernatants of patients are significantly higher than control group at all time points (). Blockage of TLR-4 by HTA125 can decrease the production of TNF-α and IL-10 compared with lps group (, except at 4 h group of IL-10). Concentration of TNF-α and IL-10 also decreases in the LPS + RP group () but not so significantly as in the LPS + HTA125 group. Conclusion. As anti-TLR4 monoclonal antibodies, rheum Polysaccharide can also inhibit the secretion of cytokines produced by monocytes from HLA-B27 positive AAU patients of convalescence stage. Xuhui Liu, Xiaofeng Hu, Xiaosheng Zhang, Zhongqiu Li, and Hong Lu Copyright © 2013 Xuhui Liu et al. All rights reserved. A Prospective Profile of Visual Field Loss following Stroke: Prevalence, Type, Rehabilitation, and Outcome Mon, 09 Sep 2013 14:30:23 +0000 http://www.hindawi.com/journals/bmri/2013/719096/ Aims. To profile site of stroke/cerebrovascular accident, type and extent of field loss, treatment options, and outcome. Methods. Prospective multicentre cohort trial. Standardised referral and investigation protocol of visual parameters. Results. 915 patients were recruited with a mean age of 69 years (SD 14). 479 patients (52%) had visual field loss. 51 patients (10%) had no visual symptoms. Almost half of symptomatic patients () complained only of visual field loss: almost half () also had reading difficulty, blurred vision, diplopia, and perceptual difficulties. 31% () had visual field loss as their only visual impairment: 69% () had low vision, eye movement deficits, or visual perceptual difficulties. Occipital and parietal lobe strokes most commonly caused visual field loss. Treatment options included visual search training, visual awareness, typoscopes, substitutive prisms, low vision aids, refraction, and occlusive patches. At followup 15 patients (7.5%) had full recovery, 78 (39%) had improvement, and 104 (52%) had no recovery. Two patients (1%) had further decline of visual field. Patients with visual field loss had lower quality of life scores than stroke patients without visual impairment. Conclusions. Stroke survivors with visual field loss require assessment to accurately define type and extent of loss, diagnose coexistent visual impairments, and offer targeted treatment. Fiona J. Rowe, David Wright, Darren Brand, Carole Jackson, Shirley Harrison, Tallat Maan, Claire Scott, Linda Vogwell, Sarah Peel, Nicola Akerman, Caroline Dodridge, Claire Howard, Tracey Shipman, Una Sperring, Sonia MacDiarmid, and Cicely Freeman Copyright © 2013 Fiona J. Rowe et al. All rights reserved. Identifying Cell Class Specific Losses from Serially Generated Electroretinogram Components Mon, 09 Sep 2013 08:31:12 +0000 http://www.hindawi.com/journals/bmri/2013/796362/ Purpose. Processing of information through the cellular layers of the retina occurs in a serial manner. In the electroretinogram (ERG), this complicates interpretation of inner retinal changes as dysfunction may arise from “upstream” neurons or may indicate a direct loss to that neural generator. We propose an approach that addresses this issue by defining ERG gain relationships. Methods. Regression analyses between two serial ERG parameters in a control cohort of rats are used to define gain relationships. These gains are then applied to two models of retinal disease. Results. The to gain is unity whereas the to and to gains are greater than unity, indicating “amplification” (). Timing relationships show amplification between to and compression for to and to , (). Application of these gains to -3-deficiency indicates that all timing changes are downstream of photoreceptor changes, but a direct pSTR amplitude loss occurs (). Application to diabetes indicates widespread inner retinal dysfunction which cannot be attributed to outer retinal changes (). Conclusions. This simple approach aids in the interpretation of inner retinal ERG changes by taking into account gain characteristics found between successive ERG components of normal animals. Christine T. O. Nguyen, Algis J. Vingrys, Vickie H. Y. Wong, and Bang V. Bui Copyright © 2013 Christine T. O. Nguyen et al. All rights reserved. Analysis of COCH and TNFA Variants in East Indian Primary Open-Angle Glaucoma Patients Mon, 26 Aug 2013 17:36:39 +0000 http://www.hindawi.com/journals/bmri/2013/937870/ Glaucoma represents a heterogeneous group of optic neuropathies with a complex genetic basis. It is the second-largest cause of blindness in the world that reduces vision without warning and often without symptoms. Among 3 major subtypes of glaucoma, primary open-angle glaucoma (POAG) is the most common form. The focus of this study is to understand the molecular basis of the disease among Indian patients with respect to two genes, Cochlin (COCH) and tumor necrosis factor alpha (TNFA), selected based on reports of possible association with POAG. The genes were screened in patients and controls by PCR and direct sequencing. Although two novel changes (–450 C/T and –79 G/G) were identified in the 5′upstream region of COCH, no causal variant could be identified in either gene. –450 C/T was detected in 3 patients and 2 controls and –79 G/C in a single patient. Further, we did not observe significant association with the promoter SNPs of TNFA that had been previously reported to be associated with POAG pathogenesis. Thus, our study suggests lack of association of both COCH and TNFA with POAG pathogenesis. Subhadip Chakraborty, Suddhasil Mookherjee, Abhijit Sen, and Kunal Ray Copyright © 2013 Subhadip Chakraborty et al. All rights reserved. Spectrum of Bacterial Keratitis at a Tertiary Eye Care Centre in India Mon, 26 Aug 2013 15:35:08 +0000 http://www.hindawi.com/journals/bmri/2013/181564/ Aim. To report the aetiological spectrum and susceptibility patterns of bacteria isolated from patients with corneal ulceration. Method. The microbiological data of all patients with suspected infectious corneal ulceration who presented to the ocular microbiology service at this centre between 2005 and 2012 were reviewed retrospectively. Result. Microorganisms were recovered from 1665 (77%) of the 2170 ulcers. Bacterial isolates accounted for 1205 of the organisms isolated. The most common bacterial pathogens isolated were various species of Staphylococcus, representing 777 (64.5%), followed by Staphylococcus spp. (148; 12.3%) and Pseudomonas aeruginosa (117; 9.7%). High percentages of Gram-positive bacteria were susceptible to gatifloxacin (>94%), followed by ofloxacin and moxifloxacin. Almost 90% of Pseudomonas aeruginosa isolates were susceptible to ciprofloxacin and moxifloxacin. Sixty-two (44%) of 140 isolates of Streptococcus pneumoniae, 79 (14.8%) of 534 isolates of Staphylococcus epidermidis, and 33 (14%) of 234 isolates of Staphylococcus aureus were resistant to three or more antibiotics. Conclusion. Staphylococcus spp. were the most common bacterial pathogens isolated from patients with keratitis in this setting. High percentages of Gram-positive and Gram-negative bacteria were susceptible to gatifloxacin and moxifloxacin, respectively. Interestingly, a high percentage of Streptococcus pneumoniae isolates were found to be resistant to three or more antibiotics. Jayaraman Kaliamurthy, Catti Muniswamy Kalavathy, Pragya Parmar, Christadas Arul Nelson Jesudasan, and Philip A. Thomas Copyright © 2013 Jayaraman Kaliamurthy et al. All rights reserved. Initial Dose of Three Monthly Intravitreal Injections versus PRN Intravitreal Injections of Bevacizumab for Macular Edema Secondary to Branch Retinal Vein Occlusion Mon, 26 Aug 2013 13:24:00 +0000 http://www.hindawi.com/journals/bmri/2013/209735/ Purpose. To compare visual and anatomic outcomes of intravitreal bevacizumab injections administered as needed (PRN group) and initial treatment with 3 monthly injections followed by as-needed injections (3 monthly initial dose group) in patients with macular edema (ME) secondary to branch retinal vein occlusion (BRVO). Methods. This retrospective study included 69 and 26 patients in the PRN and 3 monthly initial dose groups, respectively. Best-corrected visual acuity (BCVA) and central retinal thickness (CRT) were compared between the 2 groups 6 months after initial injection. Results. At month 6, BCVA change from baseline was (mean ± standard deviation) logMAR in the PRN group and  logMAR in the 3 monthly initial dose group. Mean CRT changes were in the PRN group and  μm in the 3 monthly initial dose group at month 6. There were no statistically significant differences in BCVA or CRT changes between groups at any time point. The number of intravitreal injections over 6 months was significantly lower in the PRN group ( injections) than in the 3 monthly initial dose group ( injections; ). Conclusions. Our results suggest that as-needed intravitreal bevacizumab injections are more tolerable for patients with ME secondary to BRVO. Seong Joon Ahn, Jeeyun Ahn, Se Joon Woo, and Kyu Hyung Park Copyright © 2013 Seong Joon Ahn et al. All rights reserved. Diagnostic Procedures and Management of Dry Eye Mon, 19 Aug 2013 08:19:41 +0000 http://www.hindawi.com/journals/bmri/2013/309723/ Dry eye disease or dysfunctional tear syndrome is among the most frequent diagnoses in ophthalmology. It is a multifactorial disease of the ocular surface and tear film which results in ocular discomfort, visual disturbances, and tear instability with potential damage to the cornea and conjunctiva. Risk factors for dry eye syndrome include age, sex (female gender), race, contact lens wear, environment with low humidity, systemic medications, and autoimmune disorders. The aim of this paper is to present the systematic classification, epidemiology, diagnostic procedures, and advances in the management of dry eye disease. The recent improvements in comprehending the underlying etiologic factors will inevitably improve future classifications and diagnostic abilities leading to more effective therapeutic options. Treatment of this highly prevalent condition can drastically improve the quality of life of individuals and prevent damage to the ocular surface. Snježana Kaštelan, Martina Tomić, Jasminka Salopek-Rabatić, and Branko Novak Copyright © 2013 Snježana Kaštelan et al. All rights reserved. SDOCT Thickness Measurements of Various Retinal Layers in Patients with Autosomal Dominant Optic Atrophy due to OPA1 Mutations Mon, 19 Aug 2013 08:09:54 +0000 http://www.hindawi.com/journals/bmri/2013/121398/ Purpose. To specify thickness values of various retinal layers on macular spectral domain Optical Coherence Tomography (SDOCT) scans in patients with autosomal dominant optic atrophy (ADOA) compared to healthy controls. Methods. SDOCT volume scans of 7 patients with ADOA (OPA-1 mutation) and 14 healthy controls were quantitatively analyzed using manual grading software. Mean thickness values for the ETDRS grid subfields 5–8 were calculated for the spaces neurosensory retina, retinal nerve fiber layer (RNFL), ganglion cell layer (GCL), a combined space of inner plexiform layer/outer plexiform layer/inner nuclear layer (IPL+INL+OPL), and a combined space of outer nuclear layer/photoreceptor layers (ONL+PL). Results. ADOA patients showed statistically significant lower retinal thickness values than controls (). RNFL () and GCL thicknesses () were significantly lower in ADOA patients. There was no difference in IPL+INL+OPL and in ONL+PL thickness. Conclusion. Manual subanalysis of macular SDOCT volume scans allowed detailed subanalysis of various retinal layers. Not only RNFL but also GCL thicknesses are reduced in the macular area of ADOA patients whereas subjacent layers are not involved. Together with clinical findings, macular SDOCT helps to identify patients with suspicion for hereditary optic neuropathy before genetic analysis confirms the diagnosis. Andrea M. Schild, Tina Ristau, Julia Fricke, Antje Neugebauer, Bernd Kirchhof, Srinivas R. Sadda, and Sandra Liakopoulos Copyright © 2013 Andrea M. Schild et al. All rights reserved. Novel GUCA1A Mutations Suggesting Possible Mechanisms of Pathogenesis in Cone, Cone-Rod, and Macular Dystrophy Patients Wed, 14 Aug 2013 09:17:24 +0000 http://www.hindawi.com/journals/bmri/2013/517570/ Here, we report two novel GUCA1A (the gene for guanylate cyclase activating protein 1) mutations identified in unrelated Spanish families affected by autosomal dominant retinal degeneration (adRD) with cone and rod involvement. All patients from a three-generation adRD pedigree underwent detailed ophthalmic evaluation. Total genome scan using single-nucleotide polymorphisms and then the linkage analysis were undertaken on the pedigree. Haplotype analysis revealed a 55.37 Mb genomic interval cosegregating with the disease phenotype on chromosome 6p21.31-q15. Mutation screening of positional candidate genes found a heterozygous transition c.250C>T in exon 4 of GUCA1A, corresponding to a novel mutation p.L84F. A second missense mutation, c.320T>C (p.I107T), was detected by screening of the gene in a Spanish patients cohort. Using bioinformatics approach, we predicted that either haploinsufficiency or dominant-negative effect accompanied by creation of a novel function for the mutant protein is a possible mechanism of the disease due to c.250C>T and c.320T>C. Although additional functional studies are required, our data in relation to the c.250C>T mutation open the possibility that transacting factors binding to de novo created recognition site resulting in formation of aberrant splicing variant is a disease model which may be more widespread than previously recognized as a mechanism causing inherited RD. Kunka Kamenarova, Marta Corton, Blanca García-Sandoval, Patricia Fernández-San Jose, Valentin Panchev, Almudena Ávila-Fernández, Maria Isabel López-Molina, Christina Chakarova, Carmen Ayuso, and Shomi S. Bhattacharya Copyright © 2013 Kunka Kamenarova et al. All rights reserved. Topical 100% Serum Eye Drops for Treating Corneal Epithelial Defect after Ocular Surgery Tue, 30 Jul 2013 10:15:12 +0000 http://www.hindawi.com/journals/bmri/2013/521315/ The purpose of this study was to investigate the efficacy and safety of topical 100% serum eye drops for corneal epithelial defect after ocular surgery. A total of 181 patients who received topical 100% serum therapy for the treatment of corneal epithelial defect following several different types of ocular surgery were recruited into this study. Each patient already failed conventional medical therapy before being prescribed 100% serum eye drops. Slit-lamp biomicroscopic examination with fluorescein staining was performed at baseline and all follow-up visits. The main outcome measures were the rate of complete healing of the corneal epithelial defect and incidence of adverse events. One hundred and seventy-eight eyes (98.34%) received autologous serum eye drops, and 3 (1.66%) received allogeneic serum eye drops. The overall success rate of treating persistent postoperative epithelial defect using 100% serum eye drops was 93.92% (95% CI 0.88–0.98). The median time to complete corneal epithelialization was 4 days (95% CI 4-5). Adverse reactions were observed in 3 patients (1.66%), including sticky sensation with minimal eye discomfort and asymptomatic trace corneal subepithelial infiltration. No serious complications were reported. In conclusion, 100% serum eye drops are effective, safe, and tolerable for treating postoperative corneal epithelial defect following ocular surgeries. Kaevalin Lekhanont, Passara Jongkhajornpong, Lulin Choubtum, and Varintorn Chuckpaiwong Copyright © 2013 Kaevalin Lekhanont et al. All rights reserved. Intraoperative Pachymetry Using Spectral-Domain Optical Coherence Tomography during Accelerated Corneal Collagen Crosslinking Thu, 25 Jul 2013 13:25:41 +0000 http://www.hindawi.com/journals/bmri/2013/848363/ Purpose. To evaluate the role of spectral-domain optical coherence tomography (SDOCT) to measure corneal thickness during accelerated corneal crosslinking (CXL). Methods. Intraoperative pachymetry was performed using SDOCT and ultrasound pachymetry (USP) in 6 eyes of 6 patients with keratoconus. Pachymetry readings were obtained at baseline, after epithelium removal and after 30 minutes of riboflavin instillation. SDOCT measurements of eyes with and without lid speculum during riboflavin instillation were compared. Results. There was no statistically significant difference in central corneal thickness (CCT) measurements between SDOCT and USP ( for all). A significant decrease in both CCT () and the thinnest corneal thickness (TCT) () was observed during CXL. There was a greater reduction in CCT (38 ± 6%) with the use of lid speculum as compared to the no-speculum eyes (18 ± 9%) (). TCT was also reduced by a greater extent with the use of lid speculum (40 ± 5% versus 26 ± 7%; ). Conclusion. SDOCT can be successfully used to measure intraoperative corneal pachymetry during corneal CXL. SDOCT measurements demonstrated corneal thinning intraoperatively during CXL, which was further accentuated by the use of a lid speculum during the procedure. Vanissa W. S. Chow, Sayantan Biswas, Marco Yu, Victoria W. Y. Wong, and Vishal Jhanji Copyright © 2013 Vanissa W. S. Chow et al. All rights reserved. Influence of BAK-Preserved Prostaglandin Analog Treatment on the Ocular Surface Health in Patients with Newly Diagnosed Primary Open-Angle Glaucoma Thu, 18 Jul 2013 12:22:08 +0000 http://www.hindawi.com/journals/bmri/2013/603782/ Purpose. Primary open-angle glaucoma (POAG), a chronic, degenerative optic neuropathy, requires persistent decrease of intraocular pressure so as to prevent visual impairment and blindness. However, long-term use of topical ocular medications may affect ocular surface health. Purpose of this study was to evaluate the influence of BAK-preserved prostaglandin analog treatment on the ocular surface health in patients with newly diagnosed POAG. Methods. 40 newly diagnosed POAG patients were included in this prospective study. Intraocular pressure (IOP), tear break-up time (TBUT), and ocular surface disease index (OSDI) were assessed at baseline and 3-month after starting treatment with BAK-preserved travoprost 0.004%. Results. IOP decreased in all patients from baseline to 3-month final visit (23.80 ± 1.73 mmHg versus 16.78 ± 1.27 mmHg; ). Mean TBUT decreased from seconds at baseline to 8.30 ± 1.29 seconds at 3-month final visit (<0.001). Mean OSDI score increased from 31.63 ± 18.48 to 44.41 ± 16.48 (). Conclusions. This study showed that BAK-preserved travoprost 0.004% is an effective medication in newly diagnosed POAG patients, but its long-term use may negatively influence ocular surface health by disrupting the tear film stability. Further studies are needed to better understand the clinical effects of different preservative types and concentrations on the ocular surface. Martina Tomić, Snježana Kaštelan, Kata Metež Soldo, and Jasminka Salopek-Rabatić Copyright © 2013 Martina Tomić et al. All rights reserved. Normative Findings for Periocular Anthropometric Measurements among Chinese Young Adults in Hong Kong Wed, 17 Jul 2013 09:33:21 +0000 http://www.hindawi.com/journals/bmri/2013/821428/ Measurement of periocular structures is of value in several clinical specialties including ophthalmology, optometry, medical and clinical genetics, oculoplastic surgery, and traumatology. Therefore we aimed to determine the periocular anthropometric norms for Chinese young adults using a noninvasive 3D stereophotography system. Craniofacial images using the 3dMDface system were acquired for 103 Chinese subjects (51 males and 52 females) between the ages of 18 and 35 years. Anthropometric landmarks were identified on these digital images according to standard definitions, and linear distances between these landmarks were calculated. It was found that ocular measurements were significantly larger in Chinese males than females for intercanthal width, biocular width, and eye fissure lengths. No gender differences were found in the eye fissure height and the canthal index which ranged between 43 and 44. Both right and left eye fissure height-length ratios were significantly larger in females. This is the first study to employ 3D stereophotogrammetry to create a database of anthropometric normative data for periocular measurements. These data would be useful for clinical interpretation of periocular pathology and serve as reference values when planning aesthetic and posttraumatic surgical interventions. Yasas S. N. Jayaratne, Curtis K. Deutsch, and Roger A. Zwahlen Copyright © 2013 Yasas S. N. Jayaratne et al. All rights reserved. Increased Expression of CCN2 in the Red Flashing Light-Induced Myopia in Guinea Pigs Sun, 14 Jul 2013 08:34:57 +0000 http://www.hindawi.com/journals/bmri/2013/761823/ Visual environment plays an important role in the occurrence of myopia. We previously showed that the different flashing lights could result in distinct effects on the ocular growth and development of myopia. CCN2 has been reported to regulate various cellular functions and biological processes. However, whether CCN2 signaling was involved in the red flashing light-induced myopia still remains unknown. In the present study, we investigated the effects of the red flashing lights exposure on the refraction and axial length of the eyes in vivo and then evaluated their effects on the expression of CCN2 and TGF-β in sclera tissues. Our data showed that the eyes exposed to the red flashing light became more myopic with a significant increase of the axial length and decrease of the refraction. Both CCN2 and TGF-β, as well as p38 MAPK and PI3K, were highly expressed in the sclera tissues exposed to the red flashing light. Both CCN2 and TGF-β were found to have the same gene expression profile in vivo. In conclusion, our findings found that CCN2 signaling pathway plays an important role in the red flashing light-induced myopia in vivo. Moreover, our study establishes a useful animal model for experimental myopia research. Hong Wang, Kang Zhuang, Lei Gao, Linna Zhang, and Hongling Yang Copyright © 2013 Hong Wang et al. All rights reserved. Role of Corneal Epithelium in Riboflavin/Ultraviolet-A Mediated Corneal Cross-Linking Treatment in Rabbit Eyes Thu, 27 Jun 2013 16:23:29 +0000 http://www.hindawi.com/journals/bmri/2013/624563/ Purpose. To evaluate the role of corneal epithelium in riboflavin/ultraviolet-A (UVA) mediated corneal collagen cross-linking treatment. Methods. Fifty New Zealand rabbits were divided into 5 groups: UVA treatment with or without corneal epithelium, UVA+riboflavin treatment with or without corneal epithelium, and control without any treatment. All rabbits were sacrificed after irradiation and subsequently 4 mm × 10 mm corneal strips were harvested for biomechanical evaluation. Results. UVA irradiation alone did not enhance the maximal stress and Young’s modulus of corneal specimens with (3.15 ± 0.56 mpa, 1.00 ± 0.09 mpa) or without (3.53 ± 0.85 mpa, 0.94 ± 0.21 mpa) the corneal epithelium, compared to specimens in the control group (4.30 ± 0.68 mpa, 1.03 ± 0.24 mpa). However, UVA irradiation combined with riboflavin significantly increased the maximal stress and Young’s modulus of corneal specimens with (5.27 ± 1.09 mpa, 1.23 ± 0.23 mpa, ) or without (7.16 ± 1.88 mpa, 1.42 ± 0.16 mpa, ) corneal epithelium when compared to the control group. The maximal stress and Young’s modulus of cornea in UVA+riboflavin and “epithelium-off” group were 35.9% and 15.4% higher compared to the UVA+riboflavin and “epithelium-on” group, respectively (). Conclusions. Our study shows that UVA+riboflavin treatment significantly affects the biomechanical properties of the cornea with and without epithelial removal. However, corneas without epithelium seem to benefit more compared to corneas with the epithelium. Xiangchen Tao, Haiqun Yu, Yong Zhang, Zhiwei Li, Vishal Jhanji, Shouxiang Ni, Ya Wang, and Guoying Mu Copyright © 2013 Xiangchen Tao et al. All rights reserved. Role of Dopaminergic Receptors in Glaucomatous Disease Modulation Wed, 26 Jun 2013 11:01:54 +0000 http://www.hindawi.com/journals/bmri/2013/193048/ Both studies on animals and humans suggest the presence of dopamine (DA) receptors in the anterior segment of the eye. Their role in the dynamics of intraocular pressure (IOP) is not yet clear. DA2 and DA3 receptors are mainly located on postganglionic sympathetic nerve endings. Their stimulation reduces the release of norepinephrine and suppresses the production of aqueous humor. DA1 receptors seem to be more expressed by the ciliary body and the outflow pathway of aqueous humor. The administration of DA1-selective agonists stimulates the production of aqueous humor, increasing IOP, whereas DA2- and DA3-selective agonists could reduce IOP and, therefore, the risk to develop a glaucoma (GL). GL is a broad spectrum of eye diseases which have in common the damage to the optic nerve and the progressive loss of the visual field. Further studies are desirable to clarify the role of the dopaminergic system and the usefulness of DA2 and DA3 agonists in reducing IOP. Nicola Pescosolido, Francesco Parisi, Paola Russo, Giuseppe Buomprisco, and Marcella Nebbioso Copyright © 2013 Nicola Pescosolido et al. All rights reserved. Spectacle Coverage and Spectacles Use among Elderly Population in Residential Care in the South Indian State of Andhra Pradesh Sun, 23 Jun 2013 11:37:58 +0000 http://www.hindawi.com/journals/bmri/2013/183502/ Background. There is limited research conducted on uncorrected refractive errors, presbyopia, and spectacles use among the elderly population in residential care in developing countries such as India. We conducted a cross-sectional study among elderly in residential care to assess the spectacle coverage and spectacles usage in the south Indian state of Andhra Pradesh. Methods. All 524 residents in the 26 “homes for aged” institutions in the district were enumerated. Eye examination was performed that included visual acuity (VA) assessment for distant and near vision. A questionnaire was used to collect information on spectacles use. Results. 494/524 individuals were examined, 78% were women, and 72% had no education. The mean age of participants was 70 years. The spectacle coverage for refractive errors was 35.1% and 23.9% for presbyopia. The prevalence of current use and past use of spectacles was 38.5% (95% CI: 34.2–42.8; ) and 17.2% (95% CI: 13.9–42.8), respectively. Conclusions. There is low spectacle coverage for both refractive errors and presbyopia among elderly individuals in residential care in the south Indian state of Andhra Pradesh. Appropriate service delivery systems should be developed to reach out this vulnerable group of seniors on a priority basis. Srinivas Marmamula, L. V. Chandra Sekhar Ravuri, Mei Ying Boon, and Rohit C. Khanna Copyright © 2013 Srinivas Marmamula et al. All rights reserved. Effect of Pupil Size on Optical Quality Parameters in Astigmatic Eyes Using a Double-Pass Instrument Sun, 23 Jun 2013 11:29:49 +0000 http://www.hindawi.com/journals/bmri/2013/124327/ Purpose. To objectively determine the effects of pupil size on optical quality parameters in astigmatic eyes using a double-pass instrument. Methods. We examined twenty-two eyes of 22 healthy volunteers (mean age ± standard deviation, years) who had no ophthalmic diseases other than refractive errors (manifest cylinder ≤0.25 diopters (D)). After we fully corrected cycloplegic refraction, we created with-the-rule astigma tism of 1, 2, and 3 diopters in these eyes and then quantitatively assessed the modulation transfer function (MTF) cutoff frequency and the Strehl2D ratio with 2-, 4-, and 6-mm pupil sizes using the Optical Quality Analysis System. Results. The MTF cutoff frequency and the Strehl2D ratio decreased significantly as the amount of astigmatism increased at each pupil size ( for 2, 4, and 6 mm, analysis of variance). They also decreased significantly with an increase in pupil size at each diopter of astigmatism ( for 0, 1, 2, and 3 D). Multiple comparisons demonstrated a significant difference between measurements made for a 2-mm pupil and for a 6-mm pupil at each diopter of astigmatism ( for 0, 1, 2, and 3 D, Dunnett test) and those made for a 4-mm pupil and for a 6-mm pupil at each diopter of astigmatism ( for 0 D, 1, 2, and 3 D). Conclusions. Eyes with larger pupils had lower optical quality even when they were astigmatic. It may be necessary to correct the preexisting astigmatism to acquire excellent visual performance, especially in astigmatic eyes with larger pupils. Hidenaga Kobashi, Kazutaka Kamiya, Kyohei Yanome, Akihito Igarashi, and Kimiya Shimizu Copyright © 2013 Hidenaga Kobashi et al. All rights reserved. Effect of Fluorometholone/Tetrahydrozoline Fixed Combination on Conjunctival Autograft Morphology after Primary Pterygium Excision Thu, 20 Jun 2013 10:42:27 +0000 http://www.hindawi.com/journals/bmri/2013/481843/ Purpose. To evaluate the effect of a fluorometholone/tetrahydrozoline fixed combination on conjunctival graft morphology after primary pterygium excision. Methods. The patients who underwent pterygium excision with conjunctival autograft transplantation were randomized into three groups based on postoperative medications as the fluorometholone/tetrahydrozoline group, fluorometholone group, and dexamethasone group. Conjunctival graft thickness was measured with anterior segment optical coherence tomography. The conjunctival graft hyperemia was evaluated using a high definition external camera. Results. The mean graft thickness was significantly lower in the fluorometholone/tetrahydrozoline group compared with fluorometholone and dexamethasone groups at 2 weeks ( and , resp.) and at 1 month after surgery ( and , resp.). The conjunctival hyperemia score was significantly lower in the fluorometholone/tetrahydrozoline group compared with fluorometholone and dexamethasone groups at 2 weeks ( and , resp.) and at 1 month ( and , resp.). The graft thickness and conjunctival hyperemia score were similar among the groups at 1 week and 3 months (). Conclusion. The findings of the present study revealed that treatment with the fluorometholone/tetrahydrozoline fixed combination may be helpful to decrease graft edema and to achieve better cosmetic appearance at 2 weeks and 1 month after pterygium excision. Engin Bilge Ozgurhan, Necip Kara, Ercument Bozkurt, Baran Gencer, Alper Agca, Zeynep Alkin, and Ahmet Demirok Copyright © 2013 Engin Bilge Ozgurhan et al. All rights reserved. Lower Lid Reconstruction Utilizing Auricular Conchal Chondral-Perichondral Tissue in Patients with Neoplastic Lesions Thu, 20 Jun 2013 08:22:19 +0000 http://www.hindawi.com/journals/bmri/2013/837536/ Purpose. To assess surgical outcomes of lower lid reconstruction surgery using auricular conchal tissue. Methods. This prospective study included 20 patients that underwent reconstructive lower lid surgery using autologous auricle chondral-perichondral graft tissue. Auricle tissue was used to provide adequate support and protection with similar conjunctiva tarsal structures on overlying soft tissues in patients with pathologic inferior lid tissue loss requiring reconstructive surgery. Biopsies with histopathology and cytology analysis were taken after 1 year. Cytology analysis using CK19 was used to confirm newly formed conjunctiva overlying the graft. Results. All patients showed no graft rejection. Surgical outcomes were generally good, with minimal or no ocular complications. 16 of 20 patients had excellent results, showing good lid symmetry and esthetics, minimal auricular discomfort, patient satisfaction and proper lid function. Surgical outcomes were highly dependent on proper post-op conjunctiva formation. All patients were positive for CK19, thus indicating proper conjunctiva tissue formation. Conclusions. Lower lid reconstruction surgery using auricular chondral-perichondral conchal tissue is a good alternative in patients with neoplastic lesions. Autologous chondral-perichondral tissue provides good functional and mechanical support in the reconstructed lid, thus reducing the risks of ectropion and corneal exposure and ensuring a protected ocular surface. Pier Camillo Parodi, Fabrizio Calligaris, Fabrizio De Biasio, Giovanna De Maglio, Flavia Miani, and Marco Zeppieri Copyright © 2013 Pier Camillo Parodi et al. All rights reserved. Reduction of Orbital Inflammation following Decompression for Thyroid-Related Orbitopathy Tue, 18 Jun 2013 16:32:38 +0000 http://www.hindawi.com/journals/bmri/2013/794984/ Purpose. Thyroid-related orbitopathy (TRO) is associated with inflammation, expansion of orbital fat, enlargement of extraocular muscles, and optic neuropathy (ON). We examined the effects of orbital decompression on the inflammatory and congestive signs of TRO in patients who underwent emergent orbital decompression. Methods. This retrospective, consecutive study included patients with ON from TRO who underwent orbital decompression. Pre- and postoperative orbital inflammatory signs in the operated and nonoperated, contralateral eyes were graded with the 10-item clinical activity score (CAS). Results. Thirty-one orbits were included. Postoperatively, 22 patients and 29 orbits had resolution of ON while the remaining 2 patients had improvement in visual acuity. Mean preoperative CAS was 9.5 ± 0.4. At 12 months, postoperative CAS was 2.1 ± 0.6 () in the operated eye and 3.2 ± 0.5 () in the nonoperated, contralateral eye. Conclusion. In our series, 94% of orbits had resolution of ON. There was also a statistically significant postoperative reduction in the CAS in both the operated and nonoperated, contralateral eyes. This phenomenon may be due to lowered venous congestion, decreased intraorbital pressure, and diminution in inflammatory factors. Sang-Rog Oh, Jonathan D. Tung, Ayelet Priel, Leah Levi, David B. Granet, Bobby S. Korn, and Don O. Kikkawa Copyright © 2013 Sang-Rog Oh et al. All rights reserved. Influence of Scleral Buckling Surgery with Encircling Band on Subfoveal Choroidal Thickness in Long-Term Observations Tue, 11 Jun 2013 11:50:24 +0000 http://www.hindawi.com/journals/bmri/2013/586894/ Purpose. The aim of this study is the presentation of subfoveal choroidal thickness with enhanced depth imaging spectral-domain optical coherence tomography (EDI-OCT) several months after scleral buckling with encircling band surgery. Methods. 48 patients who underwent scleral buckling with encircling band surgery for unilateral rhegmatogenous retinal detachment were included in the retrospective observational study. The mean time from scleral buckling surgery to the final EDI-OCT examination was months. We compare choroidal thickness between operated and fellow eyes. Results. In all patients, the macula was detached before the surgery. The subfoveal choroidal thickness in 48 treated eyes was  µm (range 155–383 µm) and in the fellow eyes was  µm (range 98–326 µm). The subfoveal choroidal thickness of eyes after scleral buckling surgery in long-term EDI-OCT examination was significantly thicker () than in fellow eyes. Conclusions. The subfoveal choroid in eyes undergoing encircling band surgery was significantly thicker than in fellow eyes. We suspect that this may be the result of reduced choroidal blood flow. It also seems that the width and size of the material used in scleral buckling surgery may affect a change in the choroid circulation and increase subfoveal choroidal thickness. Dominik Odrobina, Iwona Laudańska-Olszewska, Piotr Gozdek, Mariusz Maroszyński, and Michael Amon Copyright © 2013 Dominik Odrobina et al. All rights reserved. Use of a New Ocular Insert versus Conventional Mydriasis in Cataract Surgery Thu, 30 May 2013 15:28:03 +0000 http://www.hindawi.com/journals/bmri/2013/849349/ Background. To compare the efficacy and safety of a new ocular insert versus conventional mydriasis in cataract surgery. Methods. We selected 70 patients undergoing cataract surgery. Thirty five patients (Group 1) received instillation of mydriatic drops (tropicamide 1%, phenylephrine 10%, and cyclopentolate 1%) prior to surgery, and 35 patients (Group 2) had a Mydriasert insert (Théa Pharma) (0.28 mg of tropicamide and 5.4 mg of phenylephrine hydrochloride) placed in the inferior fornix. Pupil size before and after surgery, blood pressure, and heart rate were measured. Results. Before surgery, pupil diameter was  mm in Group 1 and in Group 2 (). Twenty four hours after surgery, pupil diameter was  mm in Group 1 and in Group 2 (). There were no statistically significant differences in blood pressure or heart rate between groups. Conclusions. The effect of the Mydriasert insert was similar to conventional mydriatic agents. Pupil size was restored to normal faster when using the Mydriasert insert compared with conventional mydriatic agents for pupil dilation. C. Torrón, P. Calvo, O. Ruiz-Moreno, J. Leciñena, and A. Pérez-Iñigo Copyright © 2013 C. Torrón et al. All rights reserved. Individual IOL Surface Topography Analysis by the WaveMaster Reflex UV Tue, 28 May 2013 09:03:47 +0000 http://www.hindawi.com/journals/bmri/2013/363742/ Purpose. In order to establish inspection routines for individual intraocular lenses (IOLs), their surfaces have to be measured separately. Currently available measurement devices lack this functionality. The purpose of this study is to evaluate a new topography measurement device based on wavefront analysis for measuring individual regular and freeform IOL surfaces, the “WaveMaster Reflex UV” (Trioptics, Wedel, Germany). Methods. Measurements were performed on IOLs with increasingly complex surface geometries: spherical surfaces, surfaces modelled by higher-order Zernike terms, and freeform surfaces from biometrical patient data. Two independent parameters were measured: the sample’s radius of curvature (ROC) and its residual (difference of sample topography and its best-fit sphere). We used a quantitative analysis method by calculating the residuals’ root-mean-square (RMS) and peak-to-Valley (P2V) values. Results. The sample’s best-fit ROC differences increased with the sample’s complexity. The sample’s differences of RMS values were 80 nm for spherical surfaces, 97 nm for higher-order samples, and 21 nm for freeform surfaces. Graphical representations of both measurement and design topographies were recorded and compared. Conclusion. The measurements of spherical surfaces expectedly resulted in better values than those of freeform surfaces. Overall, the wavefront analysing method proves to be an effective method for evaluating individual IOL surfaces. Marc Kannengießer, Achim Langenbucher, and Edgar Janunts Copyright © 2013 Marc Kannengießer et al. All rights reserved. Integrins in Trabecular Meshwork and Optic Nerve Head: Possible Association with the Pathogenesis of Glaucoma Mon, 18 Mar 2013 10:08:53 +0000 http://www.hindawi.com/journals/bmri/2013/202905/ Integrins are a family of membrane-spanning proteins that are important receptors for cell adhesion to extracellular matrix proteins. They also provide connections between the extracellular environment and intracellular cytoskeletons and are responsible for activation of many intracellular signaling pathways. In vitro and in vivo data strongly indicate that integrin-mediated signaling events can modulate the organization of the actin cytoskeleton in trabecular meshwork (TM) cells and are associated with astrocyte migration and microglia activation of the optic nerve head in patients with primary open angle glaucoma. Consequently, increase in resistance in the TM outflow pathways and remodeling of the optic nerve head occur, which in turn increases intraocular pressure (IOP), adds additional mechanical stress and strain to optic nerve axons, and accelerates damage of axons initially caused by optic nerve head remodeling. Integrins appear to be ideal candidates for translating physical stress and strain into cellular responses known to occur in glaucomatous optic neuropathy. Yisheng Zhong, Jing Wang, and Xunda Luo Copyright © 2013 Yisheng Zhong et al. All rights reserved. Rabbit and Mouse Models of HSV-1 Latency, Reactivation, and Recurrent Eye Diseases Tue, 02 Oct 2012 12:21:30 +0000 http://www.hindawi.com/journals/bmri/2012/612316/ The exact mechanisms of HSV-1 establishment, maintenance, latency, reactivation, and also the courses of recurrent ocular infections remain a mystery. Comprehensive understanding of the HSV-1 disease process could lead to prevention of HSV-1 acute infection, reactivation, and more effective treatments of recurrent ocular disease. Animal models have been used for over sixty years to investigate our concepts and hypotheses of HSV-1 diseases. In this paper we present descriptions and examples of rabbit and mouse eye models of HSV-1 latency, reactivation, and recurrent diseases. We summarize studies in animal models of spontaneous and induced HSV-1 reactivation and recurrent disease. Numerous stimuli that induce reactivation in mice and rabbits are described, as well as factors that inhibit viral reactivation from latency. The key features, advantages, and disadvantages of the mouse and rabbit models in relation to the study of ocular HSV-1 are discussed. This paper is pertinent but not intended to be all inclusive. We will give examples of key papers that have reported novel discoveries related to the review topics. Jody M. Webre, James M. Hill, Nicole M. Nolan, Christian Clement, Harris E. McFerrin, Partha S. Bhattacharjee, Victor Hsia, Donna M. Neumann, Timothy P. Foster, Walter J. Lukiw, and Hilary W. Thompson Copyright © 2012 Jody M. Webre et al. All rights reserved. Diabetic Retinopathy Analysis Mon, 01 Jan 1900 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2005/957582/abs/ Diabetic retinopathy is one of the common complications of diabetes. Unfortunately, in many cases the patient is not aware of any symptoms until it is too late for effective treatment. Through analysis of evoked potential response of the retina, the optical nerve, and the optical brain center, a way will be paved for early diagnosis of diabetic retinopathy and prognosis during the treatment process. In this paper, we present an artificial-neural-network-based method to classify diabetic retinopathy subjects according to changes in visual evoked potential spectral components and an anatomically realistic computer model of the human eye under normal and retinopathy conditions in a virtual environment using 3D Max Studio and Windows Movie Maker. R. Sivakumar, G. Ravindran, M. Muthayya, S. Lakshminarayanan, and C. U. Velmurughendran Copyright © 2005 Hindawi Publishing Corporation. All rights reserved.