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Evaluation between biomechanical and topographic parameters: normal versus keratoconus

Poster Details

First Author: S.Aliyeva AZERBAIJAN

Co Author(s):    A. Safarova                    

Abstract Details

Purpose:

Measuring the corneal biomechanical properties and knowing about the corr�Ã�©lations between biomechanical and topographic parameters for normal cornea and keratoconus may help to detect keratoconus suspect corneas and eliminate the risk for ectasia after LASIK.

Setting:

National Ophtalmology Centre named after acad.Zarifa Aliyeva

Methods:

We reviewed data of 120eyes separated into two groups: normal (n=40), keratoconus (n=80). The Corneal Hysteresis (CH) and Corneal Resistance Factor (CRF) were measured by the Analyzer ll Wavelight (Alcon, AB�Å�ž) The following information was obtained for each patient: age, sex, and data related to the Analyzer ll including CH and CRF. Central corneal thickness (CCT) was provided by Wavelight Oculyzer (Alcon, AB�Å�ž). Also, data on the keratometry in the 3, 5 and 7 mm are provided, with Wavelight Oculyzer (Alcon, AB�Å�ž) (surface asymetry, keratometry in various zones, eccentricity, etc,,.)

Results:

There were significantly more males in the keratoconus group (p<0.001). The mean age was not statistically different between the two groups. Mild corr�Ã�©lations were found for some parameters. The higher corr�Ã�©lation was found between (CH-CRF) and the keratometric value of the steepest meridian in the central 3 mm for both groups. This corr�Ã�©lation was higher in the keratoconus group R=0,483 (P<0,001) than for the normal group R=0.442 (P<0,001)

Conclusions:

This is the first study to compare the corr�Ã�©lations between biomechanical and topographic properties for normal and keratoconus. By knowing more about these correlations, we can understand the biomechanical cons�Ã�©quences of topographic parameters on the cornea. The real goal is to establish a KC Risk score.

Financial Disclosure:

NONE

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