LASIK IN POST KERATOPLASTY ASTIGMATISM

Abstract

•Pcistkeratoplasty astigmatism is considered one of jthe most annoying complications of penetrating keratoplasty, eveJ!t after a successful surgery leading to significant limitation tf visual performance. I

In the past, this problem was very difficult to correct even by early or late postoperative suture, removal or resuturing. I •

Some authors recommended corneal wedge rescctio . Others recommended relaxing procedures, including arcuate, tran verse or trapezoid keratomies which act by flattening the steepest mehdian. I On the other hand, both photorefractive keratectomy add LASIK have proven to significantly reduce post-keratoplasty refracti've error. I LASIK is preferred to photo-refractive keratectomy due to less incidence of complications. ! . ' I The primary goal of LASlK aJ'ter penetrating keratopl<jsty is the resolution of anisometropia and <lstigmalism In allow he iter visf1al acuity or at least to allow spectacle correction or contact lens conn ction, tn order to help the patient retain his binocular vision. I

This study was performed on 30 eyes divided into twolgroups:

' The first group: in which two steps LASlK technique was clone. It involves creating the flap J'irst, then re-evaluating the rcl'raltion ami corneal topography one month later. This is followed by Jasen' ablation. This technique aims at taking into account the refractive changes created by the flap creation in order to be more accurate in tissue ab'lation.