准分子激光原位角膜磨镶术治疗近视散光的疗效分析

Laser in situ keratomileusis for compound myopic astigmatism with a scanning spot excimer laser

目的 评价应用小光斑扫描的激光机行准分子激光原位角膜磨镶术 (LASIK)治疗不同程度复性近视散光的疗效。方法 观察1999年2月至2000年7月在本院行LASIK的208例 (308眼 )复性近视散光患者术后1周、1月、3月、6月的视力、等效球镜度、散光度和散光轴向 ,按散光度不同分为低度、中度和高度3组进行统计分析。结果 术后6月3组患者的散光度分别为 (0.31±0.23)、(0.61±0.41)、(1.68±0.57)D。矫正散光的轴向差小于10°。术后6月3组患者的裸眼视力和术前最佳矫正视力无明显差别 (P>0.05)。 结论 应用小光斑扫瞄的激光机行LASIK治疗不同程度近视散光疗效确切。矫正散光的轴向基本准确。矫正高度散光约在1周至1月之间产生一定量的回退 。

Objectives To evaluate the efficacy of excimer laser in situ keratomileusis(LASIK) in correcting compound myopic astimatism with a scanning spot excimer laser.Methods Two hundred and eight cases (308 eyes) with compound myopic astigmtism that underwent LASIK with laser LSX during Feb.1999 to Jul.2000 were studied retrospectively.All cases were divided into three groups according to the refractive cylinder, and followed up for 1 day, 1 week, 1 month and 3 months to 6 months after surgery.Results The mean astigmatism 6 months after operation was (0.31±0.23) D,(0.61±0.41)D and (1.68±0.57)D, respectively. Angles between pre and post-operative astigmatic axes were less than 10 degree(10°).There was no difference between visual acuity at 6 month after operation and the best corrected visual acuity before operation.Conclusion LASIK for correcting compound myopic astigmatism with a scanning spot excimer laser was effective.The correcting astigmatic axes were accurate.But some regression had been observed in high astigmatism group at 1 week to 1 month , and prolonged for 3 months after surgery.