通过观察５０例（１００眼）ＲＫ术后角膜水肿变化与疗效的关系发现，角膜水肿在术后早期对角膜曲率的改变有明显影响，角膜水肿的变化与切口条数有密切关系，条数越多，水肿消退时间越长。但多在１─３月内基本消退，尤以术后１─１．５月内变化最明显。视区外角膜水肿时对角膜中央曲率有降低效应，即能增加矫正效果，而水肿消退时，这种效应随之消失。从而提示，在作手术设计时，必须考虑这一特定时期内角膜水肿对远期疗效的影响。 By observing the relationship between corneal edema and curative effect in 50 cases (100 eyes) of RK, we found that corneal edema had a significant influence on the change of corneal curvature in the early postoperative period. The change of corneal edema was closely related to the number of incisions. More, edema faded longer. But mostly subsided in January-March, especially in the most obvious changes within 1 to 1.5 months after surgery. Corneal edema outside the area of ​​the corneal central curvature has a reducing effect, which can increase the correction effect, and edema subsided, the effect disappears. Thus prompted, in the design of surgery, we must consider the specific period of corneal edema on the long-term effect.