LASIK术后角膜地形图的变化及临床效果的分析

Changes of corneal topography and clinical effects after laser in situ keratomileusis for myopia correction

目的:探讨准分子激光原位角膜磨镶术治疗近视后角膜地形图的变化,并对其疗效、安全性和术后并发症等方面进行观察。方法:对60例(112眼)近视眼患者行准分子激光原位角膜磨镶术(LASIK),按屈光度将所有病例分为3组,Ⅰ组:-1.45～-6.20D(34眼),Ⅱ组:-6.45～-10.20D(53眼),Ⅲ组:-10.45～-14.00D(25眼)。检查术前和术后1wk;1,3及6mo的视力(裸眼视力和矫正视力)、屈光度、角膜地形图的改变。结果:模拟角膜计度数(simk)较术前降低,术后1wk角膜地形图平滑形占83%,其它形占17%,无中央小岛形成,切削形态随时间延长逐渐变规则。术后3mo裸眼视力≥1.0的各组分布比率是100%、96%、92%,屈光度在3mo术后基本稳定,术后并发症少。结论:LASIK手术是治疗近视的一种安全、有效且可预测性好的手术方法,角膜地形图可帮助我们详细了解角膜表面的形状,预测手术效果。

AIM： To study the changes of corneal topography and to analyze the clinical effects after LASIK for myopia. METHODS： According to the preoperative diopters of the myopia the patients were divided into three groups： group Ⅰ ： -1.45--6.20D （34 eyes）, group Ⅱ：-6.45--10. 20D （53 eyes） ,group III ：-10.45--14.00D （25 eyes）. They were examined with eyesight, diopter and corneal topography preoperaUvely and lwk; 1,3 and 6mo postoperatively. RESULTS： Simk decreased after surgery. The percent of bomogeneous pattern was 83% at lwk after LASIK and the bomogeneous pattern became more regular gradually. The percentage of uncorrected visual acuity equal to or more than 1.0 were 100%, 96% and 92% respectively in the three months after LASIK. The spherical equivalent was stable at 3mo after LASIK. CONCLUSION： LASIK is a safe, effective and predictable method for treatment of myopia. We can find out the figure of corneal and parameter concerned with diopter by corneal topography, and then forecast the surgery results.