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目的 评价准分子激光二次屈光性角膜切削术治疗准分子激光屈光性角膜切削术(PRK) 术后残余近视的疗效。方法 对因PRK 术后残余近视而进行再次激光治疗的42 例(58 眼) 病人的临床资料作回顾性分析。二次PRK 术后随访时间为6 ～24(14 ±5) 个月。结果 58 眼二次PRK 术前残余近视度为- 5-55 D±2-67 D( - 0-75 ～- 14-00 D) ,术后为- 0-15 D±0-94 D( + 0-75 ～- 2-75D) ,其中44 眼(75-9 % ) 最后屈光度稳定在预矫正度的±1-00 D 以内;二次PRK 术后裸眼视力为0-71 ±0-33 ,其中54 眼(93-1 % ) 裸眼视力≥0-6 ,3 眼(5-2 % ) 最佳矫正视力损失≥1 行;二次PRK 术前角膜雾浊均为0 级,术后42 眼为0 级,15 眼为0-5 级,1 眼为1-0 级。结论 二次PRK 治疗残余近视具有较好的安全性、预测性和屈光稳定性。
Objective To evaluate the effect of excimer laser secondary refractive keratectomy on residual myopia after excimer laser refractive keratectomy (PRK). Methods A retrospective analysis was performed on the clinical data of 42 patients (58 eyes) who underwent further laser treatment due to residual myopia after PRK. Secondary PRK followed up for 6 to 24 (14 ± 5) months. Results The residual myopia before secondary PRK in 58 eyes was - 5-55 D ± 2-67 D (-0-75 ~ -14-00 D), and postoperative was -0-15 D ± 0-94 D (+ 0-75 ~ - 2-75D), of which 44 (75-9%) of the final refraction was stable within ± 1-00 D of the pre-orthodontic degree; the second-order PRK postoperative uncorrected visual acuity was 0-71 ± 0-33, Among them, 54 eyes (93-1%) had uncorrected visual acuity ≥0-6, and 3 eyes (5-2%) had best corrected visual acuity loss ≥1 line. Corneal haze before second PRK was grade 0 and 42 eyes 0, 15 eyes 0-5, 1 eyes 1-0. Conclusions The second PRK treatment of residual myopia has good safety, predictability and refractive stability.