准分子激光角膜原位磨镶术治疗近视

目的 评价准分子激光角膜原位磨镶术（ＬＡＳＩＫ）在治疗近视眼中的作用。方法 将６７８例（９２８只眼）近视眼患者（－２．００￣－２０．００Ｄ）分为３组：Ｉ组为－２．００￣－６．００Ｄ、Ⅱ组为－６．１０￣－１０．００Ｄ及Ⅲ组为－１０．１０￣－２０．００Ｄ，均采用ＬＡＳＩＫ进行治疗，术后平均随访１年（６￣１８个月），并对其资料进行分析。结果 Ｉ组：术后１年时平均残余屈光度为－０．２４±０．５０Ｄ，屈光度

Excimer laser in situ keratomileusis for treatment of myopia

OBJECTIVE: To evaluate the effectiveness of excimer laser in situ keratomileusis (LASIK) for treatment of myopia. METHODS: 928 eyes of 678 myopic patients who received LASIK were studied. The patients were divided into 3 groups according to preoperative diopters (-2.00 - -6.00D, -6.10 - -10.00D & -10.10 - -20.00D). The mean follow-up was 12 months (6 - 18 months) and the results were statistically analyzed. RESULTS: 12 months after surgery, in the first group the mean residual refraction was -0.24 +/- 0.50D in 86% and 92% of eyes were in the ranges of refraction +/- 0.50D and +/- 1.00D, the uncorrected visual acuities of 0.5 and 1.0 were in 99% and 86% of the eyes respectively. In the second group, the mean residual refraction was -0.47 +/- 0.64D, the refraction of 83% and 90% of eyes was in the ranges of +/- 0.50D and +/- 1.00D, and the uncorrected visual acuities in 95% and 79% of eyes were 0.5 and 1.0 respectively. In the third group, the mean residual refraction was -0.89 +/- 1.02D, the refraction of 36% and 62% of the eyes were in the ranges of +/- 0.50D and +/- 1.00D, and the uncorrected visual acuities in 68% and 45% of the eyes were 0.5 and 1.0 respectively. 47 eyes had been retreated with LASIK. 5 eyes lost two or more lines of the best corrected visual acuity due to irregular astigmatism, decentration and progressive myopic maculopathy. CONCLUSION: The results indicate that LASIK can treat myopia in the range of -2.00 - -20.00 D effectively without vision threatening complications. Some modification of the surgical techniques and laser nomogram will help to improve predictability and stability of outcome.