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North African people have thinner corneas with normal ORA measurements

Poster Details

First Author: L.Sihem ALGERIA

Co Author(s):    J. Colin   K. Heykel   M. Chahbi        

Abstract Details


Central corneal thickness (CCT) measure is a critical point before refractive surgery. It is well known that surgery cannot be performed under a thickness of 500 microns


north africa


Pentacam pachymetry was performed in refractive surgery centers on 1615 eyes of patients originating from North Africa, and ocular response analyser (ORA) on 250 eyes, (126 with CCT< 500 microns). With European control group (200 eyes from Bordeaux)


Most of the patients (70%) were aged from 20 to 35 years old. Thirty eight percent (38%) had a CCT between 450 and 500 microns, 40% between 500 and 550 microns. Patients with Keratoconus were excluded from this study. There was no significant difference between biomechanical properties (CH; CRF) of corneas with CCT less or more than 500 microns


Publications on this subject being very poor, a study on a larger number of patients has to be conducted in order to confirm the relationship between CCT, ORA and ethnic origin.

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