Journal of Ophthalmology http://www.hindawi.com The latest articles from Hindawi Publishing Corporation © 2014 , Hindawi Publishing Corporation . All rights reserved. Posttraumatic Orbital Emphysema: A Numerical Model Tue, 16 Sep 2014 09:07:07 +0000 http://www.hindawi.com/journals/joph/2014/231436/ Orbital emphysema is a common symptom accompanying orbital fracture. The pathomechanism is still not recognized and the usually assumed cause, elevated pressure in the upper airways connected with sneezing or coughing, does not always contribute to the occurrence of this type of fracture. Observations based on the finite model (simulating blowout type fracture) of the deformations of the inferior orbital wall after a strike in its lower rim. Authors created a computer numeric model of the orbit with specified features—thickness and resilience modulus. During simulation an evenly spread 14400 N force was applied to the nodular points in the inferior rim (the maximal value not causing cracking of the outer rim, but only ruptures in the inferior wall). The observation was made from to second after a strike. Right after a strike dislocations of the inferior orbital wall toward the maxillary sinus were observed. Afterwards a retrograde wave of the dislocation of the inferior wall toward the orbit was noticed. Overall dislocation amplitude reached about 6 mm. Based on a numeric model of the orbit submitted to a strike in the inferior wall an existence of a retrograde shock wave causing orbital emphysema has been found. Andrzej Skorek, Paweł Kłosowski, Łukasz Plichta, Dorota Raczyńska, Marcin Zmuda Trzebiatowski, and Paweł Lemski Copyright © 2014 Andrzej Skorek et al. All rights reserved. Outcome and Prognostic Factors for Traumatic Endophthalmitis over a 5-Year Period Mon, 15 Sep 2014 05:45:15 +0000 http://www.hindawi.com/journals/joph/2014/747015/ Purpose. To evaluate the outcome and identify the prognostic factors of traumatic endophthalmitis over a 5-year period. Methods. We reviewed the medical records of all the traumatic endophthalmities that we treated in our department over the last 5 years (2009–2013). We extracted the following parameters: age, gender, wound anatomy, associated ocular lesions, treatment, and initial and final visual acuities. We used the program SPSS version 20.0.0. for the statistical analysis of our data. Results. During the last 5 years, we treated 14 traumatic endophthalmities, representing 46.66% of all types of endophthalmities. The infection rate in open globe injuries was 8.13% and 34.78%, if an intraocular foreign body (IOFB) was associated. All the patients were males with the median age of 37 years. Initial visual acuities varied between light perception and 0.4 and the timing of treatment from a few hours to 10 days. We administered antibiotic and anti-inflammatory drugs, systemically and intravitreally, in all cases. We performed pars plana vitrectomy in 64.28% of cases. In 57.14% of cases, the final visual acuity was 0.1 or more. Conclusions. IOFBs increased significantly the risk for endophthalmitis. The worse prognostic factors were retinal detachment at presentation and delayed treatment. This trial is registered with IRCT2014082918966N1. Simona Delia Nicoară, Iulian Irimescu, Tudor Călinici, and Cristina Cristian Copyright © 2014 Simona Delia Nicoară et al. All rights reserved. Effect of Hemodialysis on Retinal Thickness in Patients with Diabetic Retinopathy, with and without Macular Edema, Using Optical Coherence Tomography Mon, 15 Sep 2014 00:00:00 +0000 http://www.hindawi.com/journals/joph/2014/709862/ Background. Effects of hemodialysis (HD) treatment on retinal thickness and macular edema are unclear. Objective. To evaluate changes in retinal thickness using optical coherence tomography (OCT) in end stage renal disease (ESRD) patients with diabetic retinopathy (DR), with and without diabetic macular edema (DME), undergoing HD. Methods. Nonrandomized prospective study. Forty eyes of DR patients with ESRD treated with HD were divided into two groups: patients with macular edema and patients without macular edema. Both eyes were analyzed. Patients underwent an ophthalmic examination including OCT measurements of retinal thickness, blood albumin and hemoglobin A1C levels, blood pressure, and body weight, 30 minutes before and after HD. Results. We found no significant effects of HD on retinal thickness among patients both with and without DME. The former showed a trend towards reduction in retinal thickness in foveal area following HD, while the latter showed an increase. There was no correlation between retinal thickness and mean blood pressure, weight, kinetic model value—, glycemic hemoglobin, or albumin levels before and after HD. Conclusions. HD has no significant effect on retinal thickness among patients with or without DME. Further studies on larger cohorts and repeated OCT examinations are needed to confirm the preliminary findings in this study. Nur Azem, Oriel Spierer, Meital Shaked, and Meira Neudorfer Copyright © 2014 Nur Azem et al. All rights reserved. The Clinical Characteristics and Surgical Outcomes of Epiblepharon in Korean Children: A 9-Year Experience Sun, 14 Sep 2014 09:17:58 +0000 http://www.hindawi.com/journals/joph/2014/156501/ Purpose. To examine the demographic characteristics, clinical features, surgical outcomes, and long-term prognoses of epiblepharon in Korean children. Methods. Epiblepharon patients who were followed for ≥ 6 month following surgical correction between January 2005 and December 2013. The patient demographics, clinical features, concomitant disorders, surgical outcomes, and complications were retrospectively reviewed. Results. A total of 768 epiblepharon records were included in the analysis. The mean patient age was years. At presentation, 712 patients (92.8%) complained of typical epiblepharon symptoms. The mean patient age at surgery was years, with 629 patients (81.9%) on the lower lid and 72 patients (9.4%) on the upper lid and 82 patients (10.7%) undergoing surgery on both lids. The eyelid was well everted with no recurrence in 740 patients (96.4%). Conclusion. Epiblepharon frequently occurs in Korean children and is correctable with a simple surgery. Recurrence and serious complications do not occur often, and any suspicions of epiblepharon should be investigated. A thorough ocular examination can lead to a correct diagnosis and timely corrective surgery. Most procedures are successful and prevent secondary complications that often occur with uncorrected epiblepharon. Jong Soo Kim, Sang Wook Jin, Mun Chong Hur, Yoon Hyung Kwon, Won Yeol Ryu, Woo Jin Jeong, and Hee Bae Ahn Copyright © 2014 Jong Soo Kim et al. All rights reserved. Orbital Epidermoid Cysts: A Diagnosis to Consider Mon, 08 Sep 2014 12:02:11 +0000 http://www.hindawi.com/journals/joph/2014/508425/ Background. Orbital epidermoids form a rare pathological entity that is separate from dermoid cysts. They have variable clinical and radiological presentations and they should be considered in the differential diagnosis of orbital cystic lesions. This work describes the various clinical and radiological presentations of 17 cases of epidermoid cysts and the surgical outcome. Method. A prospective interventional study was conducted on 17 patients diagnosed with epidermoid cysts. Patients’ symptoms and signs were recorded; CT scan was done for all patients. All lesions were removed through anterior orbitotomy and histopathological diagnosis confirmed. Results. Mean age of patients was 16.3 years . Main complaints were lid swelling, masses, ocular dissimilarity, chronic pain, and ocular protrusion. Clinical signs varied from lid swelling and masses in all cases to proptosis, globe displacement, limitation of ocular motility, and scars. Radiological findings ranged from homogenous hypodense masses (58.8%) to homogenous radiolucent (17.6%) and heterogenous masses (23.5%). No recurrences following surgeries were reported throughout the follow-up (mean 18.8 months ). Conclusion. Deep orbital epidemoid cysts are a separate entity that can behave like deep orbital epidermoid; however, they usually present at a relatively older age. They can be associated with increased orbital volume but not necessarily related to bony sutures. Rania A. Ahmed and Rasha M. Eltanamly Copyright © 2014 Rania A. Ahmed and Rasha M. Eltanamly. All rights reserved. Clinical Outcomes after Complete Intracorneal Ring Implantation and Corneal Collagen Cross-Linking in an Intrastromal Pocket in One Session for Keratoconus Mon, 08 Sep 2014 09:06:11 +0000 http://www.hindawi.com/journals/joph/2014/568128/ Purpose. The aim of this work was to evaluate the results after combined surgery implantation of full rings and CXL in one session in a group of patients with keratoconus during a 12-month follow-up. Material and Methods. The study included 22 eyes of 20 keratoconic patients, mean age of 28.41 (from 18 to 50) years. A full ring was inserted and afterwards 0.1% riboflavin solution was injected into the corneal pocket through the incision tunnel. The cornea was irradiated with UV-A light for 30 minutes. Postoperative visits were scheduled for the first week and months 1, 3, 6, 12, and 24 after surgery. Minimal follow-up time was 12 months. Results. The mean UDVA improved by 6 lines from before the operation to 1 year after the operation, the mean CDVA improved by approximately 2.5 lines, and the mean K improved by 3.94 D. Statistically significant reductions of sphere , cylinder , and spherical equivalents were found 1 month after surgery. Conclusion. The combined surgery MyoRing implantation and CXL seems to be a safe method in the treatment of keratoconus. We noticed an improvement of the refractive error in all of our patients. Pavel Studeny, Deli Krizova, and Zbynek Stranak Copyright © 2014 Pavel Studeny et al. All rights reserved. Subthreshold Micropulse Photocoagulation for Persistent Macular Edema Secondary to Branch Retinal Vein Occlusion including Best-Corrected Visual Acuity Greater Than 20/40 Thu, 04 Sep 2014 00:00:00 +0000 http://www.hindawi.com/journals/joph/2014/251257/ To assess the efficacy of subthreshold micropulse diode laser photocoagulation (SMDLP) for persistent macular edema secondary to branch retinal vein occlusion (BRVO), including best-corrected visual acuity (BCVA) > 20/40, thirty-two patients (32 eyes) with macular edema secondary to BRVO were treated by SMDLP. After disease onset, all patients had been followed for at least 6 months prior to treatment. Baseline Snellen visual acuity was used to categorize the eyes as BCVA ≤ 20/40 (Group I) or BCVA > 20/40 (Group II). Main outcome measures were reduction in central macular thickness (CMT) in optical coherence tomography (OCT) and BCVA at 6 months. In the total subject-pool at 6 months, BCVA had not changed significantly but CMT was significantly reduced. Group I exhibited no significant change in CMT at 3 months but exhibited significant reductions at 6 and 12 months. Group II exhibited a marginally significant reduction in CMT at 3 months and a significant reduction at 6 months. In patients with persistent macular edema secondary to BRVO, SMDLP appears to control macular edema with minimal retinal damage. Our findings suggest that SMDLP is an effective treatment method for macular edema in BRVO patients with BCVA > 20/40. Keiji Inagaki, Kishiko Ohkoshi, Sachiko Ohde, Gautam A. Deshpande, Nobuyuki Ebihara, and Akira Murakami Copyright © 2014 Keiji Inagaki et al. All rights reserved. High-Resolution Imaging of Patients with Bietti Crystalline Dystrophy with CYP4V2 Mutation Wed, 03 Sep 2014 08:20:17 +0000 http://www.hindawi.com/journals/joph/2014/283603/ The purpose of this study was to determine the retinal morphology of eyes with Bietti crystalline dystrophy (BCD) associated with a CYP4V2 mutation using high-resolution imaging techniques. Three subjects with BCD underwent detailed ophthalmic examinations. High-resolution fundus images were obtained with an adaptive optics (AO) fundus camera. A common homozygous mutation was detected in the three patients. Funduscopic examination of the three patients revealed the presence of crystalline deposits in the retina, and all of the crystalline deposits were also detected in the infrared (IR) images. The crystals observed in the IR images were seen as bright reflective plaques located on the RPE layer in the SD-OCT images. The clusters of hyperreflective signals in the AO images corresponded to the crystals in the IR images. High-magnification AO images revealed that the clusters of hyperreflective signals consisted of circular spots that are similar to the signals of cone photoreceptors. Most of these circular spots were detected in healthy areas in the FAF images. There is a possibility that circular spots observed by AO are residual cone photoreceptors located over the crystals. Kiyoko Gocho, Shuhei Kameya, Keiichiro Akeo, Sachiko Kikuchi, Ayumi Usui, Kunihiko Yamaki, Takaaki Hayashi, Hiroshi Tsuneoka, Atsushi Mizota, and Hiroshi Takahashi Copyright © 2014 Kiyoko Gocho et al. All rights reserved. Effects of Preoperative Intravenous Clonidine in Patients Undergoing Cataract Surgery: A Double-Blind, Randomized Trial Tue, 02 Sep 2014 11:59:48 +0000 http://www.hindawi.com/journals/joph/2014/346549/ Objectives. The aim of this study was to assess the effects of clonidine on intraoperative analgesia, sedation, intraocular and blood pressure, arrhythmia, and ischemia. Methods. Forty patients undergoing cataract surgery were allocated into two groups. They were monitored with Holter machine, the pupil was dilated, and 30 minutes later, 20 patients received clonidine (4 µg/kg), while the other 20 patients were given a 0.9% saline intravenously. Twenty minutes later, 2% lidocaine gel was applied. There were assessed intraoperative analgesia, intraocular pressure, blood pressure, heart rate, and the occurrence of arrhythmias and myocardial ischemia. Results. Pain intensity was lower in G1 during the phacoemulsification, irrigation, aspiration, and intraocular lens implantation. The HR and BP were lower with clonidine. The IOP was lower with clonidine after 15 minutes and at the end of the surgery. Sedation was higher with clonidine. The incidence of arrhythmia was lower at the end of surgery with clonidine. The incidence of myocardial ischemia did not differ between the groups. Conclusions. Clonidine (4 µg/kg) before a phacoemulsification reduced the intensity of pain during cataract surgery. It also induced sedation, reduction of BP, HR, and incidence of arrhythmia at the end of the surgery, and did not alter myocardial ischemia. This trial is registered with Clinicaltrials.gov NCT01677351. Ana Ellen Queiroz Santiago, Adriana Machado Issy, and Rioko Kimiko Sakata Copyright © 2014 Ana Ellen Queiroz Santiago et al. All rights reserved. The Role of Microglia in Diabetic Retinopathy Sun, 31 Aug 2014 09:24:53 +0000 http://www.hindawi.com/journals/joph/2014/705783/ There is growing evidence that chronic inflammation plays a role in both the development and progression of diabetic retinopathy. There is also evidence that molecules produced as a result of hyperglycemia can activate microglia. However the exact contribution of microglia, the resident immune cells of the central nervous system, to retinal tissue damage during diabetes remains unclear. Current data suggest that dysregulated microglial responses are linked to their deleterious effects in several neurological diseases associated with chronic inflammation. As inflammatory cytokines and hyperglycemia disseminate through the diabetic retina, microglia can change to an activated state, increase in number, translocate through the retina, and themselves become the producers of inflammatory and apoptotic molecules or alternatively exert anti-inflammatory effects. In addition, microglial genetic variations may account for some of the individual differences commonly seen in patient’s susceptibility to diabetic retinopathy. Jeffery G. Grigsby, Sandra M. Cardona, Cindy E. Pouw, Alberto Muniz, Andrew S. Mendiola, Andrew T. C. Tsin, Donald M. Allen, and Astrid E. Cardona Copyright © 2014 Jeffery G. Grigsby et al. All rights reserved. Genetics of Keratoconus: Where Do We Stand? Thu, 28 Aug 2014 09:35:24 +0000 http://www.hindawi.com/journals/joph/2014/641708/ Keratoconus is a progressive thinning and anterior protrusion of the cornea that results in steepening and distortion of the cornea, altered refractive powers, and reduced vision. Keratoconus has a complex multifactorial etiology, with environmental, behavioral, and multiple genetic components contributing to the disease pathophysiology. Using genome-wide and candidate gene approaches several genomic loci and genes have been identified that highlight the complex molecular etiology of this disease. The review focuses on current knowledge of these genetic risk factors associated with keratoconus. Khaled K. Abu-Amero, Abdulrahman M. Al-Muammar, and Altaf A. Kondkar Copyright © 2014 Khaled K. Abu-Amero et al. All rights reserved. Coping Style and Quality of Life in Elderly Patients with Vision Disturbances Thu, 21 Aug 2014 08:24:49 +0000 http://www.hindawi.com/journals/joph/2014/584627/ Purpose. This study aims at evaluating coping style and quality of life in patients with glaucoma and cataract. Methods. The participants were patients (, 130F; mean age: M = 67,8; SD = 9,5) with low vision caused by cataract and glaucoma who answered the Quality of Life Questionnaire (QOLQ) by Schalock and Keith. The participants were divided by means of cluster analysis (k-means) according to coping styles measured by CISS (Endler and Parker) into three groups: (1) high mobilization for coping, (2) task-oriented coping, and (3) low mobilization for coping. Results. In all the group, a general quality of life was moderately lowered; however, in task-oriented group it was relatively high. Moreover, task-oriented group had significantly lower level of anxiety (STAI), hopelessness (HS), and loneliness (UCLA LS-R) and higher level of self-esteem (SES) in comparison to the patients from high mobilization and low mobilization for coping. Conclusions. In an old age, adaptive coping with vision disturbances does not necessarily mean flexibility in combining all coping styles, but rather task-oriented coping and an ability to use social support. Extreme mobilization for coping seems not adaptive similarly like low mobilization for coping because it violates balance between environmental requirements and personal resources. Maria Oles and Piotr Oles Copyright © 2014 Maria Oles and Piotr Oles. All rights reserved. Trabecular-Iris Circumference Volume in Open Angle Eyes Using Swept-Source Fourier Domain Anterior Segment Optical Coherence Tomography Tue, 19 Aug 2014 12:00:29 +0000 http://www.hindawi.com/journals/joph/2014/590978/ Purpose. To introduce a new anterior segment optical coherence tomography parameter, trabecular-iris circumference volume (TICV), which measures the integrated volume of the peripheral angle, and establish a reference range in normal, open angle eyes. Methods. One eye of each participant with open angles and a normal anterior segment was imaged using 3D mode by the CASIA SS-1000 (Tomey, Nagoya, Japan). Trabecular-iris space area (TISA) and TICV at 500 and 750 µm were calculated. Analysis of covariance was performed to examine the effect of age and its interaction with spherical equivalent. Results. The study included 100 participants with a mean age of 50 (±15) years (range 20–79). TICV showed a normal distribution with a mean (±SD) value of 4.75 µL (±2.30) for TICV500 and a mean (±SD) value of 8.90 µL (±3.88) for TICV750. Overall, TICV showed an age-related reduction . In addition, angle volume increased with increased myopia for all age groups, except for those older than 65 years. Conclusions. This study introduces a new parameter to measure peripheral angle volume, TICV, with age-adjusted normal ranges for open angle eyes. Further investigation is warranted to determine the clinical utility of this new parameter. Mohammed Rigi, Lauren S. Blieden, Donna Nguyen, Alice Z. Chuang, Laura A. Baker, Nicholas P. Bell, David A. Lee, Kimberly A. Mankiewicz, and Robert M. Feldman Copyright © 2014 Mohammed Rigi et al. All rights reserved. Theoretical Basis, Laboratory Evidence, and Clinical Research of Chemical Surgery of the Cornea: Cross-Linking Mon, 18 Aug 2014 08:20:44 +0000 http://www.hindawi.com/journals/joph/2014/890823/ Corneal cross-linking (CXL) is increasingly performed in ophthalmology with high success rates for progressive keratoconus and other types of ectasia. Despite being an established procedure, some molecular and clinical aspects still require additional studies. This review presents a critical analysis of some established topics and others that are still controversial. In addition, this review examines new technologies and techniques (transepithelial and ultrafast CXL), uses of corneal CXL including natural products and biomolecules as CXL promoters, and evidence for in vitro and in vivo indirect effectiveness. Amanda C. da Paz, Patrícia A. Bersanetti, Marcella Q. Salomão, Renato Ambrósio Jr., and Paulo Schor Copyright © 2014 Amanda C. da Paz et al. All rights reserved. Inhibition of Corneal Neovascularization by Topical and Subconjunctival Tigecycline Sun, 17 Aug 2014 00:00:00 +0000 http://www.hindawi.com/journals/joph/2014/452685/ Objective. To investigate the effects of topical and subconjunctival tigecycline on the prevention of corneal neovascularization. Materials and Methods. Following chemical burn, thirty-two rats were treated daily with topical instillation of 1 mg/mL tigecycline (group 1) or subconjunctival instillation of 1 mg/mL tigecycline (group 3) for 7 days. Control rats received topical (group 2) or subconjunctival (group 4) 0.9% saline. Digital photographs of the cornea were taken on the eighth day after treatment and analyzed to determine the percentage area of the cornea covered by neovascularization. Corneal sections were analyzed histopathologically. Results. The median percentages of corneal neovascularization in groups 1 and 3 were 48% (95% confidence interval (CI), 44.2–55.8%) and 33.5% (95% CI, 26.6–39.2%), respectively. The median percentages of corneal neovascularization of groups 1 and 3 were significantly lower than that of the control group ( and , resp.). Histologic examination of samples from groups 1 and 3 showed lower vascularity than that of control groups. Conclusion. Topical and subconjunctival administration of tigecycline seems to be showing promising therapeutic effects on the prevention of corneal neovascularization. Furthermore, subconjunctival administration of tigecycline is more potent than topical administration in the inhibition of corneal neovascularization. Sertan Goktas, Ender Erdogan, Rabia Sakarya, Yasar Sakarya, Mustafa Yılmaz, Muammer Ozcimen, Nejat Unlukal, Ismail Alpfidan, Fatih Tas, Erkan Erdogan, Abdulkadir Bukus, and Ismail Senol Ivacık Copyright © 2014 Sertan Goktas et al. All rights reserved. Aging: A Predisposition to Dry Eyes Thu, 14 Aug 2014 11:19:48 +0000 http://www.hindawi.com/journals/joph/2014/781683/ Dry eye syndrome is a disease of the ocular surface and tear film that is prevalent in older adults. Even though the degree of visual acuity loss in dry eye patients is commonly mild-to-moderate, in the aging population, this minimal change in visual status can lead to a significant decrease in visual function and quality of life. A healthy ocular surface is maintained by appropriate tear production and tear drainage, and deficiencies in this delicate balance can lead to dryness. In the aging eye, risk factors such as polypharmacy, androgen deficiency, decreased blink rates, and oxidative stress can predispose the patient to developing dry eye that is frequently more severe, has higher economic costs, and leads to worse consequences to the well-being of the patient. Understanding why elderly patients are at higher risk for developing dry eyes can provide insights into the diagnosis and management of the growing number of older adults struggling with dry eye and minimize the burden of disease on our aging population. Anushree Sharma and Holly B. Hindman Copyright © 2014 Anushree Sharma and Holly B. Hindman. All rights reserved. Current Treatment of Toxoplasma Retinochoroiditis: An Evidence-Based Review Wed, 13 Aug 2014 09:15:13 +0000 http://www.hindawi.com/journals/joph/2014/273506/ Objective. To perform an evidence-based review of treatments for Toxoplasma retinochoroiditis (TRC). Methods. A systematic literature search was performed using the PubMed database and the key phrase “ocular toxoplasmosis treatment” and the filter for “controlled clinical trial” and “randomized clinical trial” as well as OVID medline (1946 to May week 2 2014) using the keyword ‘‘ocular toxoplasmosis’’. The included studies were used to evaluate the various treatment modalities of TRC. Results. The electronic search yielded a total of 974 publications of which 44 reported on the treatment of ocular toxoplasmosis. There were 9 randomized controlled studies and an additional 3 comparative studies on the treatment of acute TRC with systemic or intravitreous antibiotics or on reducing the recurrences of TRC. Endpoints of studies included visual acuity improvement, inflammatory response, lesion size changes, recurrences of lesions, and adverse effects of medications. Conclusions. There was conflicting evidence as to the effectiveness of systemic antibiotics for TRC. There is no evidence to support that one antibiotic regimen is superior to another so choice needs to be informed by the safety profile. Intravitreous clindamycin with dexamethasone seems to be as effective as systemic treatments. There is currently level I evidence that intermittent trimethoprim-sulfamethoxazole prevents recurrence of the disease. Meredith Harrell and Petros E. Carvounis Copyright © 2014 Meredith Harrell and Petros E. Carvounis. All rights reserved. Evaluation of Epithelial Integrity with Various Transepithelial Corneal Cross-Linking Protocols for Treatment of Keratoconus Tue, 12 Aug 2014 09:18:28 +0000 http://www.hindawi.com/journals/joph/2014/614380/ Purpose. Corneal collagen cross-linking (CXL) has been demonstrated to stiffen cornea and halt progression of ectasia. The original protocol requires debridement of central corneal epithelium to facilitate diffusion of a riboflavin solution to stroma. Recently, transepithelial CXL has been proposed to reduce risk of complications associated with epithelial removal. Aim of the study is to evaluate the impact of various transepithelial riboflavin delivery protocols on corneal epithelium in regard to pain and epithelial integrity in the early postoperative period. Methods. One hundred and sixty six eyes of 104 subjects affected by progressive keratoconus underwent transepithelial CXL using 6 different riboflavin application protocols. Postoperatively, epithelial integrity was evaluated at slit lamp and patients were queried regarding their ocular pain level. Results. One eye had a corneal infection associated with an epithelial defect. No other adverse event including endothelial decompensation or endothelial damage was observed, except for epithelial damages. Incidence of epithelial defects varied from 0 to 63%. Incidence of reported pain varied from 0 to 83%. Conclusion. Different transepithelial cross-linking protocols have varying impacts on epithelial integrity. At present, it seems impossible to have sufficient riboflavin penetration without any epithelial disruption. A compromise between efficacy and epithelial integrity has to be found. Suphi Taneri, Saskia Oehler, Grace Lytle, and H. Burkhard Dick Copyright © 2014 Suphi Taneri et al. All rights reserved. Age-Related Changes of the Ocular Surface: A Hospital Setting-Based Retrospective Study Mon, 11 Aug 2014 11:33:20 +0000 http://www.hindawi.com/journals/joph/2014/532378/ Purpose. To investigate the effects of age on the prevalence of ocular surface diseases (OSD), adherence to treatment, and recovery rates. Patients and Methods. Retrospective analysis of 3000 clinical records from a first-level general ophthalmology clinic. Patients with OSD were prospectively submitted a questionnaire to assess compliance and recovery rates. Results. OSD prevalence was 10.3%. Patients with OSD were significantly older than patients without it: versus years . No significant difference in season distribution was shown. Dry eye disease (DED) represented 58% of OSD; its prevalence increased with age until 80 years old and suddenly decreased thereafter. Asymptomatic DED was 37%. Adherence to treatment in OSD was very high (94%); recovery rates were lower in patients aged 21–40 and 61–80 (resp., 65.5% and 77.8%) and this was associated with higher OSDI scores. Tear substitutes represented 50% of all prescribed medications; their use increased with age. Discussion. In a “real-life” low-tech setting, OSD showed a prevalence of 10.3%. DED was the most prevalent disease, and it was asymptomatic in more than 1/3 of cases. Laura Ottobelli, Paolo Fogagnolo, Marta Guerini, and Luca Rossetti Copyright © 2014 Laura Ottobelli et al. All rights reserved. Surgical and Visual Outcome for Recurrent Retinal Detachment Surgery Mon, 11 Aug 2014 06:56:06 +0000 http://www.hindawi.com/journals/joph/2014/810609/ Purpose. To evaluate the anatomical and functional outcome of repeated surgeries for recurrent retinal detachment. Methods. We retrospectively reviewed 70 cases with refractory retinal detachment of various etiologies that required multiple operations. Anatomical success (attached retina) or failure (totally/partially-detached retina) was assessed biomicroscopically. The BCVA was used for the evaluation of the functional outcome, at presentation and at the end of follow-up. Various pre-, intra-, and postoperative factors were associated with anatomical success or failure as well as with final functionality. Results. The mean number of surgeries was 4 (range: 2 to 10). The anatomical success rate was 80% (56 attached cases, 14 detached cases). 29% of the attached cases had a BCVA better than 20/40 (Snellen chart). The number of operations doesn’t seem to affect significantly the final visual acuity. The PVR was found to affect both the anatomical and functional outcome ( & , respectively). Conclusions. In the present study, it is suggested that multiple operations for refractory retinal detachment may result in successful anatomic results, with a fare functional outcome at the same time. Eventually, we verified that the existence of PVR worsens the prognosis. Constantin Pournaras, Chrysanthi Tsika, Catherine Brozou, and Miltiadis K. Tsilimbaris Copyright © 2014 Constantin Pournaras et al. All rights reserved. Cell Models to Study Regulation of Cell Transformation in Pathologies of Retinal Pigment Epithelium Thu, 07 Aug 2014 10:41:43 +0000 http://www.hindawi.com/journals/joph/2014/801787/ The retinal pigment epithelium (RPE) plays a key role in the development of many eye diseases leading to visual impairment and even blindness. Cell culture models of pathological changes in the RPE make it possible to study factors responsible for these changes and signaling pathways coordinating cellular and molecular mechanisms of cell interactions under pathological conditions. Moreover, they give an opportunity to reveal target cells and develop effective specific treatment for degenerative and dystrophic diseases of the retina. In this review, data are presented on RPE cell sources for culture models, approaches to RPE cell culturing, phenotypic changes of RPE cells in vitro, the role of signal pathways, and possibilities for their regulation in pathological processes. Alla V. Kuznetsova, Alexander M. Kurinov, and Maria A. Aleksandrova Copyright © 2014 Alla V. Kuznetsova et al. All rights reserved. New Trends in Anterior Segment Diseases of the Eye Tue, 05 Aug 2014 12:56:23 +0000 http://www.hindawi.com/journals/joph/2014/393040/ Francisco Javier Romero, Bjørn Nicolaissen, and Cristina Peris-Martinez Copyright © 2014 Francisco Javier Romero et al. All rights reserved. Anterior Chamber Angle Shape Analysis and Classification of Glaucoma in SS-OCT Images Tue, 05 Aug 2014 12:28:48 +0000 http://www.hindawi.com/journals/joph/2014/942367/ Optical coherence tomography is a high resolution, rapid, and noninvasive diagnostic tool for angle closure glaucoma. In this paper, we present a new strategy for the classification of the angle closure glaucoma using morphological shape analysis of the iridocorneal angle. The angle structure configuration is quantified by the following six features: (1) mean of the continuous measurement of the angle opening distance; (2) area of the trapezoidal profile of the iridocorneal angle centered at Schwalbe's line; (3) mean of the iris curvature from the extracted iris image; (4) complex shape descriptor, fractal dimension, to quantify the complexity, or changes of iridocorneal angle; (5) ellipticity moment shape descriptor; and (6) triangularity moment shape descriptor. Then, the fuzzy k nearest neighbor (fkNN) classifier is utilized for classification of angle closure glaucoma. Two hundred and sixty-four swept source optical coherence tomography (SS-OCT) images from 148 patients were analyzed in this study. From the experimental results, the fkNN reveals the best classification accuracy () and AUC () with the combination of fractal dimension and biometric parameters. It showed that the proposed approach has promising potential to become a computer aided diagnostic tool for angle closure glaucoma (ACG) disease. Soe Ni Ni, J. Tian, Pina Marziliano, and Hong-Tym Wong Copyright © 2014 Soe Ni Ni et al. All rights reserved. Pulsed Light Accelerated Crosslinking versus Continuous Light Accelerated Crosslinking: One-Year Results Sun, 03 Aug 2014 11:54:15 +0000 http://www.hindawi.com/journals/joph/2014/604731/ Purpose. To compare functional results in two cohorts of patients undergoing epithelium-off pulsed (pl-ACXL) and continuous light accelerated corneal collagen crosslinking (cl-ACXL) with dextran-free riboflavin solution and high-fluence ultraviolet A irradiation. Design. It is a prospective, comparative, and interventional clinical study. Methods. 20 patients affected by progressive keratoconus were enrolled in the study. 10 eyes of 10 patients underwent an epithelium-off pl-ACXL by the KXL UV-A source (Avedro Inc., Waltham, MS, USA) with 8 minutes (1 sec. on/1 sec. off) of UV-A exposure at 30 mW/cm2 and energy dose of 7.2 J/cm2; 10 eyes of 10 patients underwent an epithelium-off cl-ACXL at 30 mW/cm2 for 4 minutes. Riboflavin 0.1% dextran-free solution was used for a 10-minutes corneal soaking. Patients underwent clinical examination of uncorrected distance visual acuity and corrected distance visual acuity (UDVA and CDVA), corneal topography and aberrometry (CSO EyeTop, Florence, Italy), corneal OCT optical pachymetry (Cirrus OCT, Zeiss Meditec, Jena, Germany), endothelial cells count (I-Conan Non Co Robot), and in vivo scanning laser confocal microscopy (Heidelberg, Germany) at 1, 3, 6, and 12 months of follow-up. Results. Functional results one year after cl-ACXL and pl-ACXL demonstrated keratoconus stability in both groups. Functional outcomes were found to be better in epithelium-off pulsed light accelerated treatment together with showing a deeper stromal penetration. No endothelial damage was recorded during the follow-up in both groups. Conclusions. The study confirmed that oxygen represents the main driver of collagen crosslinking reaction. Pulsed light treatment optimized intraoperative oxygen availability improving postoperative functional outcomes compared with continuous light treatment. Cosimo Mazzotta, Claudio Traversi, Anna Lucia Paradiso, Maria Eugenia Latronico, and Miguel Rechichi Copyright © 2014 Cosimo Mazzotta et al. All rights reserved. Epigenetic Modifications and Potential New Treatment Targets in Diabetic Retinopathy Sun, 03 Aug 2014 11:28:35 +0000 http://www.hindawi.com/journals/joph/2014/789120/ Retinopathy is a debilitating vascular complication of diabetes. As with other diabetic complications, diabetic retinopathy (DR) is characterized by the metabolic memory, which has been observed both in DR patients and in DR animal models. Evidences have provided that after a period of poor glucose control insulin or diabetes drug treatment fails to prevent the development and progression of DR even when good glycemic control is reinstituted (glucose normalization), suggesting a metabolic memory phenomenon. Recent studies also underline the role of epigenetic chromatin modifications as mediators of the metabolic memory. Indeed, epigenetic changes may lead to stable modification of gene expression, participating in DR pathogenesis. Moreover, increasing evidences suggest that environmental factors such as chronic hyperglycemia are implicated DR progression and may also affect the epigenetic state. Here we review recent findings demonstrating the key role of epigenetics in the progression of DR. Further elucidation of epigenetic mechanisms, acting both at the cis- and trans-chromatin structural elements, will yield new insights into the pathogenesis of DR and will open the way for the discovery of novel therapeutic targets to prevent DR progression. Lorena Perrone, Carmela Matrone, and Lalit P. Singh Copyright © 2014 Lorena Perrone et al. All rights reserved. Obstructive Sleep Apnea Patients Having Surgery Are Less Associated with Glaucoma Thu, 24 Jul 2014 10:07:07 +0000 http://www.hindawi.com/journals/joph/2014/838912/ Objective. To investigate if different treatment strategy of obstructive sleep apnea (OSA) was associated glaucoma risk in Taiwanese population. Methods. Population-based retrospective cohort study was conducted using data sourced from the Longitudinal Health Insurance Database 2000. We included 2528 OSA patients and randomly selected and matched 10112 subjects without OSA as the control cohort. The risk of glaucoma in OSA patients was investigated based on the managements of OSA (without treatment, with surgery, with continuous positive airway pressure (CPAP) treatment, and with multiple modalities). The multivariable Cox regression was used to estimate hazard ratio (HR) after adjusting for sex, age, hypertension, diabetes, hyperlipidemia, and coronary artery disease. Results. The adjusted HR of glaucoma for OSA patients was 1.88 (95% CI: 1.46–2.42), compared with controls. For patients without treatment, the adjusted HR was 2.15 (95% CI: 1.60–2.88). For patients with treatments, the adjusted HRs of glaucoma were not significantly different from controls, except for those with CPAP (adjusted HR = 1.65, 95% CI = 1.09–2.49). Conclusions. OSA is associated with an increased risk of glaucoma. However, surgery reduces slightly the glaucoma hazard for OSA patients. Hsin-Yi Chen, Yue-Cune Chang, Che-Chen Lin, Fung-Chang Sung, and Wen-Chi Chen Copyright © 2014 Hsin-Yi Chen et al. All rights reserved. Role of Intravitreal Antivascular Endothelial Growth Factor Injections for Choroidal Neovascularization due to Choroidal Osteoma Wed, 23 Jul 2014 08:33:59 +0000 http://www.hindawi.com/journals/joph/2014/210458/ We treated 26 eyes of 25 young patients having a mean age of 30 years with intravitreal vascular endothelial growth factor (VEGF) inhibitor for choroidal new vessel (CNV) formation overlying choroidal osteoma over a mean follow-up of 26 months. Mean number of injections was 2.4 at 6 months, 3.2 at 12 months, and 5.5 at 24 months. CNV was subfoveal in 14 eyes, juxtafoveal in 5, extrafoveal in 5, and peripapillary in 2. By paired comparison, mean decrease from baseline was 119.7 microns at 6 months (; ), 105.3 microns at 1 year (; ), and 157.6 microns at 2 years (; ). BCVA improved by 3.3 lines at 6 months after therapy (; ), 2.8 lines (; ) at 1 year, and 3.1 lines (; ) at 2 years. We conclude that intravitreal anti-VEGF injections improve vision in majority of eyes with CNV from choroidal osteoma. Ahmad M. Mansour, J. Fernando Arevalo, Eman Al Kahtani, Hernando Zegarra, Emad Abboud, Rajiv Anand, Hamid Ahmadieh, Robert A. Sisk, Salman Mirza, Samuray Tuncer, Amparo Navea Tejerina, Jorge Mataix, Francisco J. Ascaso, Jose S. Pulido, Rainer Guthoff, Winfried Goebel, Young Jung Roh, Alay S. Banker, Ronald C. Gentile, Isabel Alonso Martinez, Rodney Morris, Neeraj Panday, Park Jung Min, Emilie Mercé, Timothy Y. Y. Lai, Vicky Massoud, and Nicola G. Ghazi Copyright © 2014 Ahmad M. Mansour et al. All rights reserved. Sustained-Release Corticosteroid Options Wed, 23 Jul 2014 00:00:00 +0000 http://www.hindawi.com/journals/joph/2014/164692/ Sustained-release corticosteroid treatment has shown to be a promising strategy for macular edema due to retinovascular disease (i.e., diabetes and retinal vein occlusion) and for the treatment of noninfectious posterior uveitis. Clinicians now have the option of three sustained-release corticosteroid implants: Ozurdex (Allergan Inc., Irvine, CA) which releases dexamethasone and two devices that release fluocinolone acetonide, Retisert (Bausch & Lomb, Rochester, NY), and Iluvien (Alimera Science, Alpharetta, GA). Each has different physical characteristics and duration effect and has been approved for different indications. Herein we provide a summary of the current clinical knowledge regarding these implants. Mariana Cabrera, Steven Yeh, and Thomas A. Albini Copyright © 2014 Mariana Cabrera et al. All rights reserved. Gender and Uveitis Tue, 22 Jul 2014 09:22:34 +0000 http://www.hindawi.com/journals/joph/2014/818070/ Chi-Chao Chan, Debra A. Goldstein, Janet L. Davis, and H. Nida Sen Copyright © 2014 Chi-Chao Chan et al. All rights reserved. Evaluation of the Repeatability and the Reproducibility of AL-Scan Measurements Obtained by Residents Tue, 22 Jul 2014 07:32:10 +0000 http://www.hindawi.com/journals/joph/2014/739652/ Purpose. To assess the repeatability and reproducibility of ocular biometry and intraocular lens (IOL) power measurements obtained by ophthalmology residents using an AL-Scan device, a novel optical biometer. Methods. Two ophthalmology residents were instructed regarding the AL-Scan device. Both performed ocular biometry and IOL power measurements using AL-Scan, three times on each of 128 eyes, independently of one another. Corneal keratometry readings, horizontal iris width, central corneal thickness, anterior chamber depth, pupil size, and axial length values measured by both residents were recorded together with IOL power values calculated on the basis of four different IOL calculation formulas (SRK/T, Holladay, and HofferQ). Repeatability and reproducibility of the measurements obtained were analyzed using the intraclass correlation coefficient (ICC). Results. Repeatability (ICC, 0.872-0.999 for resident 1 versus 0.905-0.999 for resident 2) and reproducibility (ICC, 0.916-0.999) were high for all biometric measurements. Repeatability (ICC, 0.981-0.983 for resident 1 versus 0.995-0.996 for resident 2) and reproducibility were also high for all IOL power measurements (ICC, 0.996 for all). Conclusions. The AL-Scan device exhibits good repeatability and reproducibility in all biometric measurements and IOL power calculations, independent of the operator concerned. Mehmet Kola, Hikmet Duran, Adem Turk, Suleyman Mollamehmetoglu, Ahmet Kalkisim, and Hidayet Erdol Copyright © 2014 Mehmet Kola et al. All rights reserved.