Approach to Postoperative Astigmatism after Perforating Keratoplasty by theLASIK Method

Overview

The authors present an account on a group of 10 eyes treated by the LASIK methodon an apparatus Keracor 117. In four instances hyperopia with astigmatism wasinvolved and in six eyes myopia with astigmatism, the mean age of the patientsbeing 46.25 years. The mean values of the preoperative spherical hyperopiccomponenent was +1.37 D and of the myopic spherical component -2.12 D. Thepreoperative hyperopic astigmatism was +4.5 D and the myopic astigmatism -5.84D. The follow up period was 9.5 months (1-25 months). The authors evaluate thepostoperative natural vision, the resulting postoperative refraction , the incidenceof complications and changes of endothelial cells before and after surgery.The resulting mean postoperative hyperopic astigmatism was + 0.5 D and themyopic astigmatism -2.4 D. The reduction of values of hyperopic astigmatism was88.9 % and of myopic astigmatism 58.9 %, the reduction of the spherical hyperopiccomponent was 100 % and of the myopic component 75 %.On account of the stabilization of the postoperative refraction, low incidence ofperoperative and postoperative complications and the insignificant decrease ofendothelial cells the LASIK method is evaluated as effective.

Key words:
LASIK, perfora-ting keratoplasty, astigma-tism