摘要
为分析准分子激光原位角膜磨镶术后角膜地形图的动态变化，随访ＬＡＳＩＫ后１月病人共１３７例（１９６眼），术后３月４８例（７０眼）。采用随机扫描式消融角膜基质。术后用０．３％氟嗪酸，０．１％ＦＭＬ滴眼１０天。记录术前、术后１个月、３个月的视力，屈光度数，角膜地形图。结果：术后１月角膜表面规则系数、角膜表面非对称系数明显大于术前，术后３月无明显改善。术后１月切削形态中平滑型占８９．８％，其他形态占１０．２％。切削形态随时间延长逐步变规则。术后切削中心平均偏心０．６７±０．４８ｍｍ（０～２．２４ｍｍ），偏心距离在１ｍｍ以内对最佳矫正视力影响不大，偏心方向以鼻侧居多。结论：ＬＡＳＩＫ手术由于保持了角膜上皮层及前弹力层，术后角膜及切削形态较规则，但仍然存在偏心切削的问题。角膜地形图为临床评估ＬＡＳＩＫ效果提供了客观依据。
Abstract Objective:To analyze the changes of corneal topography after laser in situ keratomileusis(LASIK).Methods:This prospective study comprised 196 eyes(137patients)l month after LASIK and 70 eyes(48 patients)3 months after LASIK.Corneal topographies were performed before surgery and l,3 months after LASIK.Results:There was a statistically significant increase in mean SRI and SAI value 1 month after LASIK,and there is no significant change 3 months later.According to the topography,there were much more homogeneous patterns after LASIK than PRK.The percent of homogeneous pattern is 89 8% one month after LASIK and 93 2% three months after LASIK.The mean decentration was 0 67±0 48mm(SD),ranging from 0 to 2 24mm.A preponderance had decentrations“to the nasal”,especially the left eyes.Conclusion:LASIK combins the accuracy of the excimer laser to remove tissue and the ability of the microkeratome to access the inner sroma and preserve the Bowmans membrane,having rather regular ablation shape,but it still has the problem of decentration ablation.Topography provides a subjective method to evaluate the result of LASIK.
出处
《中国实用眼科杂志》
CSCD
1999年第3期174-177,共4页
Chinese Journal of Practical Ophthalmology
