[Treatment of postoperative astigmatism after perforating keratoplasty using the LASIK method]

The problem of postoperative astigmatism after perforating keratoplasty is complicated. Several possible methods of correction exist. The time and approach to correction of astigmatism after perforating keratoplasty is important. The authors present an account on a group of 10 eyes treated by the LASIK method on an apparatus Keracor 117. In four instances hyperopia with astigmatism was involved and in six eyes myopia with astigmatism, the mean age of the patients being 46.25 years. The mean values of the preoperative spherical hyperopic componenent was +1.37 D and of the myopic spherical component -2.12 D. The preoperative hyperopic astigmatism was +4.5 D and the myopic astigmatism -5.84 D. The follow up period was 9.5 months (1-25 months). The authors evaluate the postoperative natural vision, the resulting postoperative refraction, the incidence of complications and changes of endothelial cells before and after surgery. The resulting mean postoperative hyperopic astigmatism was +0.5 D and the myopic astigmatism -2.4 D. The reduction of values of hyperopic astigmatism was 88.9% and of myopic astigmatism 58.9%, the reduction of the spherical hyperopic component was 100% and of the myopic component 75%. On account of the stabilization of the postoperative refraction, low incidence of peroperative and postoperative complications and the insignificant decrease of endothelial cells the LASIK method is evaluated as effective.