论文部分内容阅读
目的对准分子激光角膜切削术（ｐｈｏｔｏｒｅｆｒａｃｔｉｖｅｋｅｒａｔｅｃｔｏｍｙ，ＰＲＫ）术后角膜地形图进行分类并探讨不同类型的地形图中对比敏感度的变化。方法采用ＶＩＳＸ２０／２０Ｂ准分子激光治疗系统治疗１１１例近视及散光，术后以Ｅｙｅｓｙｓ角膜地形图仪及ＶＣＴＳ－６０００型对比敏感度仪进行术后１ａ的分析。结果将ＰＲＫ术后角膜地形图分为５类，不同类型的地形图其对比敏感度的变化不同。结论ＰＲＫ术后对角膜地形图的分类与分析对临床具有指导意义，可以解释一些临床难以解释的问题，ＰＲＫ术后对比敏感度可有不同程度的变化。
Objective To classify the corneal topography after laser keratomileusis (PRK) and discuss the contrast sensitivity of different types of topographic maps. Methods A total of 111 cases of myopia and astigmatism were treated with the VISX20 / 20B excimer laser system. Postoperatively, postoperative 1a was analyzed with the Eyesys corneal topography instrument and the VCTS-6000 contrast sensitivity instrument. Results PRK postoperative corneal topography was divided into five categories, different types of topographic maps of the contrast sensitivity of different changes. Conclusion The classification and analysis of corneal topography after PRK is of clinical significance and may explain some difficult problems to be explained in clinical practice. The contrast sensitivity after PRK may vary to some extent.