Posters

Morphogeometric differences of corneas with keratoconus according to a visual acuity grading scheme

Poster Details

First Author: F. Cavas SPAIN

Co Author(s):    L. Bataille   E. de la Cruz   D. Fernandez   P. Sanz Diez   J. Alio        

Abstract Details

Purpose:

To establish the association between visual acuity and geometric and morphometric characteristics in keratoconus disease.

Setting:

Vissum, Alicante, Spain. Technical University of Cartagena, Spain. University of Murcia, Spain.

Methods:

This was a retrospective case series study evaluating a sample (34.72 ± 11.12 years) divided into five groups according to a visual acuity grading scheme: 85 healthy eyes, 24 grade I, 14 grade II, 5 grade III and 3 grade IV and PLUS. Morphogeometric characteristics were established using an in vivo, non finite global 3D analysis of the cornea. Data engagement scores were confirmed by means of the Kolmogorov–Smirnov test. A Kruskal-Wallis test was used to compare differences according to disease stages (RETICS, a visual acuity grading system). Pairwise comparisons were performed using Dunn's procedure with a Bonferroni correction.

Results:

There were differences between groups in the following variables: Anterior corneal surface area (p<0.000), Posterior corneal surface area (p<0.000), Sagittal plane apex area (p<0.000), Sagittal Plane Area in minimum thickness points (p<0.000), Anterior apex deviation (p<0.000), Posterior apex deviation (p<0.000), Anterior minimum thickness point deviation (p<0.001), Posterior minimun thickness point deviation (p<0.001).

Conclusions:

All variables analyzed show statistically significant differences between groups, confirming that morphogeometric characteristics are related with the different stages of keratoconus disease according to a visual acuity grading scheme.

Financial Disclosure:

NONE