准分子激光角膜原位磨镶术后2年疗效分析

目的评价准分子激光角膜原位磨镶术(LASIK)治疗近视的远期疗效.方法对95只眼屈光度-1.00～-16.50 D之LASIK术后2年的结果进行分析.将其按屈光度分为两组:组Ⅰ≤-6.00D(43只眼),组Ⅱ＞-6.00D(52只眼),术后10 d、1、3、6个月、1年、1年6个月、2年行视力、屈光度、角膜曲率(K)值的随诊观察.结果LASIK术后角膜曲率(K)值和6个月后屈光度趋于稳定.术后2年:组Ⅰ裸眼视力≥1.0者为40只眼(93.02%),≥0.8者43只眼(100%);组Ⅱ裸眼视力≥1.0者37只眼(71.15%),≥0.8者45只眼(86.54%),≥0.5者50只眼(96.15%),＜0.5者2只眼(3.85%).术前屈光度:组Ⅰ(-4.14±0.86)D,组Ⅱ(-9.00±1.64)D;术后2年屈光度:组Ⅰ(-0.04±0.14)D,组Ⅱ(-0.08±0.20)D.两组术前后比较差异有显著性(P＜0.001).角膜曲率(K)值:术前K值:组Ⅰ K1(44.31±0.78),K2(42.83±0.87),组ⅡK1(45.46±1.00),K2(43.97±1.00);术后2年K值:组Ⅰ K1(40.11±1.23),K2(38.86±1.29),组ⅡK1(38.01±1.73),K2(37.07±1.71).两组术前后比较差异有显著性(P＜0.001).结论LASIK治疗低中度和高度近视均疗效显著,且安全可靠.

Analysis of the effectiveness of laser in situ keratomileusis two years after surgery

OBJECTIVE: To evaluate the effectiveness of laser in situ keratomileusis (LASIK) for myopia after 2 year follow-up. METHODS: LASIK surgery was performed for 95 eyes (49 cases) with refractive dioptres (from -1.00 to -16.50 D), and then followed up for more than 2 years. The preoperative spherical equivalent was -1.00(-)-16.50 (-6.73 +/- 2.02) D. Patients were divided into two groups including group I with mild to moderate myopia (< or = -6.00 D) and Group II with severe myopia (more than -6.00 D). RESULTS: In group I, uncorrected visual acuity more than and equivalent to 1.0 was in 40 eyes (93.02%), more than and equivalent to 0.8 in 43 eyes (100%). In group II, uncorrected visual acuity larger than and same as 1.0 was in 37 eyes (71.15%), larger than and same as 0.8 in 45 eyes (86.54%), larger than and same as 0.5 in 50 eyes (96.15%), and less than 0.5 in 2 eyes (3.85%). The mean spherical equivalent changed from (-4.14 +/- 0.86) D to (-0.04 +/- 0.14) D in group I and from (-9.00 +/- 1.64) D to (-0.08 +/- 0.20) D in group II. Significant difference was seen in these two groups (P < 0.001). The keratometric powers (K) were reduced from (44.31 +/- 0.78) to (40.11 +/- 1.23) and from (45.46 +/- 1.00) to (38.01 +/- 1.73) respectively, which showed significant difference (P < 0.001). CONCLUSION: The effectiveness of LASIK for mild to moderate myopia or severe myopia is promising and safe.