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Comparison between WaveLight EX500 excimer laser and Zyoptix treatment for astigmatism

Poster Details

First Author: O.Prisant FRANCE

Co Author(s):    T. Bernier   C. Assadi           

Abstract Details


The purpose of this study is to compare the efficacy of Wavelight EX500 excimer laser and Technolas Zyoptix treatment for astigmatism.


Clinique de la Vision, Paris, France


Eyes were retrospectively included in this study using the following inclusion criteria : At least 1 D of preoperative astigmatism, PRK or femtosecond LASIK surgery using EX500 excimer laser or the Zyoptix program of the Technolas 217P excimer laser. Pre and postoperative best corrected visual acuity (BCVA) and refractive astigmatism as well as postoperative uncorrected visual acuity (UCVA) were assessed with a minimum of 2 months follow-up.


24 eyes treated by Zyoptix were included in this study (8 PRK and 16 LASIK) as well as 20 eyes treated by EX500 laser (10 PRK and 10 LASIK). In the Zyoptix group, mean refractive astigmatism improved from 2,01 +/- 0,63 D (max 3,5 D) preoperatively to 0,39 +/- 0,31 D postoperatively. In the EX500 group, mean refractive astigmatism improved from 2,23 +/- 1,59 D (max 6,5 D) preoperatively to 0,39 +/- 0,41 D postoperatively. Differences were not statistically significant.


Wavelight EX500 excimer laser seems to be as efficient as the Zyoptix program of Technolas 217P excimer laser in the treatment of astigmatism.

Financial Disclosure:


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