Astigmatism correction with femtosecond LASIK using the Wavelight FS200

Session Details

Session Title: Refractive
Session Date/Time: Sunday 22/02/2015 | 08:30-11:00
Paper Time: 08:48
Venue: Sadirvan A
First Author: : M.Arvanitis GREECE
Co Author(s): :    R. Tsopouridou   D. Lioumi   A. Maniateas   V. Liarakos     

Abstract Details


To evaluate the outcomes of astigmatism correction over 1 diopter (D) with a specific Femtosecond LASIK device


Eye Day Clinic, private ophthalmology clinic,Athens, Greece


We evaluated 35 successive cases (eyes) with over 1D of preoperative refractive astigmatism that underwent myopic or hyperopic LASIK surgery with the Wavelight FS200 Femtosecond Laser and the EX500 Excimer Laser. Pre and post-operative refractive astigmatism was measured with the TOPCON KR8900. Cyclotorsion compensation was used when possible with the Topolyser Vario device. For reasons of conformity the cylinder was always converted to myopic astigmatism. Multivariate linear regression was used as appropriate


Mean preoperative astigmatism was -2.76D (±1.1D). The magnitude of postoperative astigmatism was -0.36D (±0.28D). The mean absolute change in spherical refraction as a measure of the spherical component of refractive error was 3.67D (±2.1D).The absolute value of postoperative spherical error was 0.29D (±0.27D). Post operative astigmatism was significantly correlated with preoperative astigmatism (p=0.01) but not with the magnitude of the spherical correction (p=0.06). The effect of preoperative to post operative astigmatism was linear when analyzed in higher versus lower preoperative astigmatism groups


The Wavelight femtosecond refractive suite proved efficient in treating astigmatism over 1D with good predictability of the outcome, which is independent of the magnitude of the spherical error treated.

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