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Evolution profiles of different corneal parameters in progressive keratoconus

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Session Details

Session Title: Presented Poster Session: Imaging Anterior Segment

Session Date/Time: Monday 07/09/2015 | 15:00-16:30

Paper Time: 15:30

Venue: Poster Village: Pod 4

First Author: : D.Smadja FRANCE

Co Author(s): :                  

Abstract Details


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.


National Reference Center for Keratoconus, Bordeaux Hospital University, France


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.


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.


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:


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