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目的:评价准分子激光屈光性角膜切削术(PRK)治疗不同程度近视的疗效。方法:应用Schwind Keratom F准分子激光机对1995眼不同程度近视(-0.75～-20.00D)行PRK治疗。按屈光度分三组:组Ⅰ≤-6.00D,873眼:组Ⅱ-6.25D～-10.00D,774眼;组Ⅲ>-10.00D,348眼。术后随访12个月,进行比较分析。结果:术后12个月Ⅰ、Ⅱ、Ⅲ组裸眼视力≥0.5者分别为98.6％,94.2％和60.4％;≥1.0者分别为85.5％,71.3％和25.9％;屈光度在±1.000以内分别为90.5％,68.8％和29.3％。角膜雾状混浊(Haze)≥2级者分别为0.8％,11.5％和13.7％。结论:PRK治疗近视对中低度疗效较好,对高度和超高度近视由于术后Haze和屈光度回退发生率增高,疗效受到明显影响,有待进—步完善手术方法和术后用药等问题。
Objective: To evaluate the efficacy of excimer laser photorefractive keratectomy (PRK) in the treatment of various degrees of myopia. Methods: The PRK of 1995 eyes with different degrees of myopia (-0.75 ~ -20.00D) were treated with Schwind Keratom F excimer laser. Divided by diopter three groups: group Ⅰ ≤ -6.00D, 873 eyes: group Ⅱ-6.25D ~ -10.00D, 774 eyes; group Ⅲ> -10.00D, 348 eyes. The patients were followed up for 12 months and analyzed comparatively. Results: The uncorrected visual acuity ≥0.5 in group Ⅰ, Ⅱ and Ⅲ were 98.6%, 94.2% and 60.4% respectively at 12 months after operation, and 85.5%, 71.3% and 25.9% at ≥1.0 respectively. The refraction within ± 1.000 were 90.5%, 68.8% and 29.3%. Corneal haze ≥2 were 0.8%, 11.5% and 13.7%, respectively. Conclusion: The treatment of myopia by PRK has a good effect on moderate and low myopia. The incidence of postoperative Haze and refraction of high myopia in high and super high myopia is increased, and the effect of PRK is obviously affected. It is necessary to further improve the operation method and postoperative medication.