Table of Contents Author Guidelines Submit a Manuscript
Journal of Ophthalmology
Volume 2015, Article ID 925414, 8 pages
http://dx.doi.org/10.1155/2015/925414
Research Article

Comparative Analysis of Anterior Segment Parameters in Normal and Keratoconus Eyes Generated by Scheimpflug Tomography

1Birinci Eye Hospital, 34520 Istanbul, Turkey
2Department of Ophthalmology, School of Medicine, Marmara University, 34782 Istanbul, Turkey

Received 23 September 2014; Revised 7 January 2015; Accepted 16 February 2015

Academic Editor: Majid M. Moshirfar

Copyright © 2015 Faik Orucoglu and Ebru Toker. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. Y. S. Rabinowitz, “Keratoconus,” Survey of Ophthalmology, vol. 42, no. 4, pp. 297–319, 1998. View at Publisher · View at Google Scholar · View at Scopus
  2. Y. S. Rabinowitz, “Videokeratographic indices to aid in screening for keratoconus,” Journal of Refractive Surgery, vol. 11, no. 5, pp. 371–379, 1995. View at Google Scholar · View at Scopus
  3. D. M. Burns, F. M. Johnston, D. G. Frazer, C. Patterson, and A. J. Jackson, “Keratoconus: an analysis of corneal asymmetry,” British Journal of Ophthalmology, vol. 88, no. 10, pp. 1252–1255, 2004. View at Publisher · View at Google Scholar · View at Scopus
  4. Z. Schlegel, T. Hoang-Xuan, and D. Gatinel, “Comparison of and correlation between anterior and posterior corneal elevation maps in normal eyes and keratoconus-suspect eyes,” Journal of Cataract and Refractive Surgery, vol. 34, no. 5, pp. 789–795, 2008. View at Publisher · View at Google Scholar · View at Scopus
  5. K. Miháltz, I. Kovács, Á. Takács, and Z. Z. Nagy, “Evaluation of keratometric, pachymetric, and elevation parameters of keratoconic corneas with pentacam,” Cornea, vol. 28, no. 9, pp. 976–980, 2009. View at Publisher · View at Google Scholar · View at Scopus
  6. R. Ambrósio Jr., R. S. Alonso, A. Luz, and L. G. C. Velarde, “Corneal-thickness spatial profile and corneal-volume distribution: tomographic indices to detect keratoconus,” Journal of Cataract and Refractive Surgery, vol. 32, no. 11, pp. 1851–1859, 2006. View at Publisher · View at Google Scholar · View at Scopus
  7. O. Muftuoglu, O. Ayar, K. Ozulken, E. Ozyol, and A. Akinci, “Posterior corneal elevation and back difference corneal elevation in diagnosing forme fruste keratoconus in the fellow eyes of unilateral keratoconus patients,” Journal of Cataract and Refractive Surgery, vol. 39, no. 9, pp. 1348–1357, 2013. View at Publisher · View at Google Scholar · View at Scopus
  8. G. A. Diamond, “What price perfection? Calibration and discrimination of clinical prediction models,” Journal of Clinical Epidemiology, vol. 45, no. 1, pp. 85–89, 1992. View at Publisher · View at Google Scholar · View at Scopus
  9. H. Hashemi, K. Yazdani, S. Mehravaran et al., “Corneal thickness in a population-based, cross-sectional study: the tehran eye study,” Cornea, vol. 28, no. 4, pp. 395–400, 2009. View at Publisher · View at Google Scholar · View at Scopus
  10. P. T. Ashwin, S. Shah, S. Pushpoth, L. Wehbeh, and B. Ilango, “The relationship of central corneal thickness (CCT) to thinnest central cornea (TCC) in healthy adults,” Contact Lens and Anterior Eye, vol. 32, no. 2, pp. 64–67, 2009. View at Publisher · View at Google Scholar · View at Scopus
  11. A. Keech, T. Simpson, and L. Jones, “Repeatability of pachymetry and thinnest point localization using a Fourier-domain optical coherence tomographer,” Optometry and Vision Science, vol. 87, no. 10, pp. 736–741, 2010. View at Publisher · View at Google Scholar · View at Scopus
  12. V. Kaya, M. Karakaya, C. A. Utine, S. Albayrak, O. F. Oge, and O. F. Yilmaz, “Evaluation of the corneal topographic characteristics of keratoconus with Orbscan II in patients with and without atopy,” Cornea, vol. 26, no. 8, pp. 945–948, 2007. View at Publisher · View at Google Scholar · View at Scopus
  13. F. Rüfer, S. Sander, A. Klettner, A. Frimpong-Boateng, and C. Erb, “Characterization of the thinnest point of the cornea compared with the central corneal thickness in normal subjects,” Cornea, vol. 28, no. 2, pp. 177–180, 2009. View at Publisher · View at Google Scholar · View at Scopus
  14. D. P. Piñero, J. L. Alió, A. Alesón, M. E. Vergara, and M. Miranda, “Corneal volume, pachymetry, and correlation of anterior and posterior corneal shape in subclinical and different stages of clinical keratoconus,” Journal of Cataract and Refractive Surgery, vol. 36, no. 5, pp. 814–825, 2010. View at Publisher · View at Google Scholar · View at Scopus
  15. S. Sahebjada, J. Xie, E. Chan, G. Snibson, M. Daniel, and P. N. Baird, “Assessment of anterior segment parameters of keratoconus eyes in an Australian population,” Optometry and Vision Science, vol. 91, no. 7, pp. 803–809, 2014. View at Publisher · View at Google Scholar · View at Scopus
  16. Ö. Ö. Uçakhan, V. Çetinkor, M. Özkan, and A. Kanpolat, “Evaluation of Scheimpflug imaging parameters in subclinical keratoconus, keratoconus, and normal eyes,” Journal of Cataract and Refractive Surgery, vol. 37, no. 6, pp. 1116–1124, 2011. View at Publisher · View at Google Scholar · View at Scopus
  17. S. M. Ahmadi Hosseini, F. Abolbashari, H. Niyazmand, and M. R. Sedaghat, “Efficacy of corneal tomography parameters and biomechanical characteristic in keratoconus detection,” Contact Lens and Anterior Eye, vol. 37, no. 1, pp. 26–30, 2014. View at Publisher · View at Google Scholar · View at Scopus
  18. WaveLight, WaveLight Allegro Oculyzer 1074 User Manual, WaveLight, Erlangen, Germany, 2001.
  19. M. Dubbelman, H. A. Weeber, R. G. L. van der Heijde, and H. J. Völker-Dieben, “Radius and asphericity of the posterior corneal surface determined by corrected Scheimpflug photography,” Acta Ophthalmologica Scandinavica, vol. 80, no. 4, pp. 379–383, 2002. View at Publisher · View at Google Scholar · View at Scopus
  20. A. J. Kanellopoulos and G. Asimellis, “Revisiting keratoconus diagnosis and progression classification based on evaluation of corneal asymmetry indices, derived from scheimpflug imaging in keratoconic and suspect cases,” Clinical Ophthalmology, vol. 7, pp. 1539–1548, 2013. View at Publisher · View at Google Scholar · View at Scopus
  21. M. W. Belin and R. Ambrósio, “Scheimpflug imaging for keratoconus and ectatic disease,” Indian Journal of Ophthalmology, vol. 61, no. 8, pp. 401–406, 2013. View at Publisher · View at Google Scholar · View at Scopus
  22. H.-B. Fam and K.-L. Lim, “Corneal elevation indices in normal and keratoconic eyes,” Journal of Cataract & Refractive Surgery, vol. 32, no. 8, pp. 1281–1287, 2006. View at Publisher · View at Google Scholar · View at Scopus
  23. K. Miháltz, I. Kovács, Á. Takács, and Z. Z. Nagy, “Evaluation of keratometric, pachymetric, and elevation parameters of keratoconic corneas with pentacam,” Cornea, vol. 28, no. 9, pp. 976–980, 2009. View at Publisher · View at Google Scholar · View at Scopus
  24. K. Kamiya, R. Ishii, K. Shimizu, and A. Igarashi, “Evaluation of corneal elevation, pachymetry and keratometry in keratoconic eyes with respect to the stage of Amsler-Krumeich classification,” British Journal of Ophthalmology, vol. 98, no. 4, pp. 459–463, 2014. View at Publisher · View at Google Scholar · View at Scopus
  25. U. de Sanctis, C. Loiacono, L. Richiardi, D. Turco, B. Mutani, and F. M. Grignolo, “Sensitivity and specificity of posterior corneal elevation measured by Pentacamin discriminating keratoconus/subclinical keratoconus,” Ophthalmology, vol. 115, no. 9, pp. 1534–1539, 2008. View at Publisher · View at Google Scholar · View at Scopus
  26. O. Muftuoglu, O. Ayar, K. Ozulken, E. Ozyol, and A. Akinci, “Posterior corneal elevation and back difference corneal elevation in diagnosing forme fruste keratoconus in the fellow eyes of unilateral keratoconus patients,” Journal of Cataract & Refractive Surgery, vol. 39, no. 9, pp. 1348–1357, 2013. View at Publisher · View at Google Scholar · View at Scopus
  27. R. Ambrósio Jr., R. S. Alonso, A. Luz, and L. G. C. Velarde, “Corneal-thickness spatial profile and corneal-volume distribution: tomographic indices to detect keratoconus,” Journal of Cataract & Refractive Surgery, vol. 32, no. 11, pp. 1851–1859, 2006. View at Publisher · View at Google Scholar · View at Scopus
  28. R. Ambrósio Jr., A. L. C. Caiado, F. P. Guerra et al., “Novel pachymetric parameters based on corneal tomography for diagnosing keratoconus,” Journal of Refractive Surgery, vol. 27, no. 10, pp. 753–758, 2011. View at Publisher · View at Google Scholar · View at Scopus