超声角膜测厚仪和角膜地形图测量LASIK前后的角膜厚度

摘要

Objective：To compare corneal thickenss value before and after LASIK operation with two different measurement.Methods：JEMED/EGH 4000 ultrosonic corneal thickness measurement and Orbscan-Ⅱ anterior system were used to measure the central corneal thickness one month before and after LASIK.Results：There was no significant difference between the two methods before LASIK(P>0.05),but they had significant difference(P<0.05) after LASIK, with Orbscan Ⅱ anterior system show lower values than those of ultrasonic meaurement in central corneal thickness. Conclusion：After LASIK, corneal topography may be affected by corneal sphere,curvature change and the design. A comparative analysis of the two values can offer reference for the undercorrected cases when they were designed to be re-operated.%目的:比较不同方法测量LASIK术前后角膜厚度的差异。 方法:分别用JEMED/EGH 4000型超声角膜测厚仪和Orbscan-Ⅱ眼前节系统于LASIK术前及术后一月测量角膜中心厚度各三次，取其均值比较。 结果:LASIK术前两种方法测量结果差异无显著性意义（P>0.05）。术后Orbscan-Ⅱ眼前节分析诊断系统测量中心角膜厚度值低于超声角膜测厚仪，两者比较差异有显著性意义（P<0.05）。结论：LASIK术后，角膜弯曲度、球面性的改变及其设计理论，可能影响角膜地形图的测定结果。对于欠矫病例再手术时，应用两种方法测量角膜厚度，互相参照，为再次手术提供保障。