准分子激光原位角膜磨镶术治疗高度近视

EXCIMER LASER IN SITU KERATOMILEUSIS (LASIK) FOR CORRECTION OF HIGH MYOPIA

目的：评估准分子激光原位角膜磨镶术（LASIK）治疗高度近视的安全性、有效性、稳定性及预测性。方法：采用SCMD气动式角膜切割刀及SCHWINDKERATOM－F型准分子激光系统，对高度近视[等值球镜-6．25D^-30．00D，平均（－12．50±5．39）D]104例164只眼行LASIK手术，其中屈光度-6．25D~－9.50D（A组）74只眼；屈光度-10．13D~－15．00D（B组）35只眼；屈光度-15．50D^-30．00D（组）55只眼。术后随访观察6个月以上。结果；术后自觉症状轻微，无角膜雾状混浊及眼压升高。术后6个月探眼视力≥1．0者A、B、C3组分别达73．0％、57．1％及7．3％，裸眼视力≥0．5者分别达100．0％、91．4％及50．9％；屈光度在±1．00D以内的分别达75．7％、45．7％及16．4％，在±3．00D以内的分别达1000％、91．4％及58．2％。99．4％术眼，术后1个月、3个月及6个月的最佳矫正视力与术前相比，未有低于2行以上者。结论：LASIK手术对于矫治高度近视有很好的疗效，无明显并发症，对于远期结果尚需进一步观察。

Objective: To study the safety, efficacy, stability, and predictability of excimer laser in situ keratomileusis for correction of high myopia. Methods:We studied 164 eyes of 104 patients with high myopia of spherical equivalent of -6. 25 D to -30. 00D [average(-12. 50 ± 5. 39) D] who received LASIK with SCMD microkeratome and SCWIND KERATOM-F excimer laser system. All patients have been folowed up for 6 months or longer. Results: No haze or intraocular pressure rise was found during the study period. Six months after surgery, uncorrected visual acuity was 1. 0 or better in 78 eyes (47. 6% ), 0. 5 or better in 134 eyes(81. 7% ). 81 eyes (49. 4% ) had a refraction within ± 1. 00 D, and 138 eyes (84. 1 % ) within ±3. 00 D. Loss of 2 or more lines of best corrected visual acuity was observed in 0. 6% of the eyes.Conclusion:LASIK is an effective and good method to correct high myopia, with minimal complications.Further study is needed to see the long term surgery results of LASIK.