【摘要】 目的 :准分子激光角膜切削术 ( PRK)后进行角膜地形图的检测分析。方法 :对 113例 ( 2 5 3眼 )近视患者手术后 1、 3、 6个月进行角膜地形图随访。结果 :PRK术后能产生一种稳定的角膜外形 ,角膜地形图主要表现为四种形态 :圆形或椭圆形 ( 4 8.62 % ) ,对称或不对称形( 2 8.0 6% ) ,半环形 ( 17.79% ) ,中央小岛形 ( 5 .5 3 % ) ,且各种形态与最佳视力有着一定的关系。术后 6个月模拟角膜计读数( Simk)表现一定的回退。 Simk差值无显著性差异 ,说明 PRK本身不引起散光。结论 :角膜地形图定量分析对 PRK术后角膜表面的改变、手术设计的改进、手术疗效的预测等是必要的。更多还原

【Abstract】 Objective: To measure and analyze the changes in corneal topography after PRK. Methods: 113 patients (253 eyes) with myopia who had undergone PRK were examined with computerized corneal topography at 1, 3 and 6 months after PRK. Results: There were 4 kinds of stable corneal morphology after PRK: round or oval (48.62 %), symmetrical or asymmetrical (28. 06 %), semi-circular (17.79 %) central-island (5.53 %). The index of Simulated keratometry (Simk) regressed partly at 6 months after operation and the changes in the Simk were not significant, Which confirmed that PRK itself did not cause astigmatism. Conclusions: Topography analysis is necessary for predicting the changes in corneal surface and the effect of therapy after PRK.更多还原