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目的：探讨PRK治疗近视的临床疗效。方法：1597眼近视分为轻中度、高度、超高度3组，应用SummitApex型准分子激光机行PRK治疗，术后点激素类眼药水，定期随访。结果：术后1年达到术前矫正视力者Ⅰ、Ⅱ、Ⅲ组分别为92．9％、81.3％和45.3％。除2例2服过矫，8例10眼回退-15—－5，0D行2次手术外，其余均在预计屈光度范围内。术后1年haze发生率Ⅰ，Ⅱ，Ⅲ组分别为3．0％、10.1％、27.2％，随屈光度增高，haze发生率和严重程度相应上升，2次术后haze和视力均有显著改善。激素性高眼压为8．7％，除1例2眼行抗青光眼手术治愈外，其余经对症处理均恢复正常。切削偏心＞1．0者2．2％，部分患者有轻度视觉症状。结论：PRK对-9．00D以下近视安全有效，预测性强，重复性好，而超高度近视因haze发生率较高且术前难以预料，故PRK不是其最佳选择。
Objective: To investigate the clinical efficacy of PRK in the treatment of myopia. Methods: 1597 myopic eyes were divided into three groups: mild to moderate, high and ultrahigh. The patients were treated with SummitApex excimer laser PRK. Postoperative hormone-like eye drops were followed up regularly. Results: The corrected visual acuity of group Ⅰ, Ⅱ and Ⅲ reached 92.9%, 81.3% and 45.3% respectively at 1 year after operation. In addition to 2 cases of 2 overcorrection, 8 cases of 10 eyes retreat -15 - 5,0 D line 2 operations, the rest are within the expected diopter. The incidence of haze at 1 year after operation was 3.0%, 10.1% and 27.2% in group Ⅰ, Ⅱ and Ⅲ, respectively. The incidence and severity of haze increased with the increase of diopter, and the haze and visual acuity were significantly improved after 2 times . Hormone intraocular pressure was 8.7%, except for 1 case of 2 eyes cured glaucoma surgery, the rest of the symptomatic treatment returned to normal. 1.0% of cutting eccentricity of 2.2%, some patients have mild visual symptoms. CONCLUSION: PRK is safe and effective for myopia of -9.00D or less, with strong predictive power and good repeatability. PRK is not the best choice because of the high incidence of haze in ultra-high myopia and its unpredictable preoperative.