Evolution profile of different corneal parameters in progressive keratoconus

Session Details

Session Title: Imaging Anterior Segment

Session Date/Time: Monday 07/09/2015 | 14:30-16:30

Paper Time: 15:26

Venue: Room 11

First Author: : J.Tellouck FRANCE

Co Author(s): :    D. Smadja   D. Touboul   T. De Castro              

Abstract Details

Purpose:

To analyze the evolution profiles of several corneal topographic and tomographic parameters in progressive keratoconus and compare to the kinetic of evolution of the anterior keratometry.

Setting:

National Reference Center for Keratoconus, Bordeaux Hospital University

Methods:

One hundred and twenty four eyes of 62 patients were prospectively enrolled and followed every 3 months during at least 1 year. Fifty-six corneal parameters were measured at each visit using a combined Placido-based and dual Scheimpflug imaging system. Percentage of progression (PP) between each visit was calculated for each parameter.

Results:

At 1 year, 12% (15/124) of eyes progressed with an increase in anterior keratometry of 1D or more. Among these eyes, posterior steepest keratometry and vertical coma had a significantly higher percentage of progression (p < 0.01) than the anterior keratometry and occurred significantly earlier (p < 0.01) than the modifications of the anterior keratometry, with changes noted on average at 6.2, 5.9 and 10.1 months, respectively for posterior keratometry, vertical coma and anterior keratometry. Pachymetric-related parameters did not show significant changes between the progressive and non-progressive eyes.

Conclusions:

Posterior keratometry and vertical coma were modified earlier than the anterior keratometry in progressive keratoconus eyes. These parameters may be relevant warning signs when monitoring progressive keratoconus

Financial Interest:

One of the authors receives consulting fees, retainer, or contract payments from a competing company