Keratoconus Detection Using Corneal Topography
- 1 October 2009
- journal article
- case report
- Published by SLACK, Inc. in Journal of Refractive Surgery
- Vol. 25 (S4) , S958-62
Abstract
Purpose: To review the topographic patterns associated with keratoconus suspects and provide criteria for keratoconus screening. Methods: Case study using maps from the NIDEK OPD-Scan II and OPD Station to highlight patterns seen in keratoconic corneas. Results: Five criteria are listed for the detection of keratoconus: 1) apex of the cone is not centered at the 6-o'clock semi-meridian, 2) cone should appear round on the tangential map, 3) keratometry >45.00 diopters, 4) corneal thickness at the apex of the cone is approximately 30 µm thinner than the corresponding distance above the pupil center, and 5) topographic patterns are not symmetric. Conclusions: Standard corneal topography maps and simple clinical evaluation criteria are fundamental to detect keratoconus suspects and keratoconus. [ J Refract Surg . 2009;25:S958–S962.]Keywords
This publication has 4 references indexed in Scilit:
- Differentiating Keratoconus and Pellucid Marginal DegenerationJournal of Refractive Surgery, 2007
- Corneal elevation indices in normal and keratoconic eyesJournal of Cataract & Refractive Surgery, 2006
- Risk factors and prognosis for corneal ectasia after LASIKOphthalmology, 2003
- Automated keratoconus detection using the EyeSys videokeratoscopeJournal of Cataract & Refractive Surgery, 2000