角膜放射状切开术相关因素及预测性

The Affecting Factors and Predictability of Radial Keratotomy

对连续性105例(208眼)角膜放射状切开术患者进行了术后半年至一年的前瞻性研究。应用多元回归法分析手术相关因素,发现手术效果与切口深度,条数,原近视度数及术后加压等因素相关,其中前二项为主要相关因素。以二种方法计算了手术预测性:90%可信限表示为3.10DS;预期值与实际值之差在1.0,1.5,2.0N及3.0DS以内者分别为62%,76%,84%和100%。设计了自己的手术公式并制成计算机软件。

105 cases (208 eyes) consecutive myopic patients ot radial Keratotomy (RK) nave been studied prospectively with the followup of half to one year. Multiple regression analysis of the outcome from the 208 eyes disclosed that incision depth, incision number, the original myopic diopter and depression of eyeball were the factors affecting the change in refraction, and that the incision depth and incision number were the major ones in our study. The predictability of RK was calculated by two kinds of methods. The first was 90% confident interval; it was 3,10 DS wide. The second was the differences between predicted and actual change in refrection within 1.0, 1.5, 2.0 and 3.0 DS; it was 62%, 76%, 84% and 100% respectively. Based on our results, the RK surgical formula and the computer software was worked out.