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目的：评价再次ＬＡＳＩＫ（准分子激光原位角膜磨镶术 ｅｘｃｉｍｅｒ ｌａｓｅｒ ｉｎ ｓｉｔｕ ｋｅｒａｔｏｍｉｌｅｕｓｉｓ，ＬＡＳＩＫ）矫正残余近视的效果、可预测性、安全性。方法：对４０只眼（３２人）ＬＡＳＩＫ术后屈光欠矫的患者行二次手术，两次手术间隔时间３～２４个月。分别在二次术后３天、１、３和６个月随访观察。结果：术后各随访时间患眼平均裸眼视力（ＵＣＶＡ）较术前明显提高（Ｐ＜０．０１），最佳矫正视力（ＢＣＶＡ）与术前无显著差异；术后平均屈光度较术前减少，差异有显著性（Ｐ＜０．０１），切削直径适量增大可减少术后屈光回退（ｏｄｄｓ ｒａｔｉｏ＝２． ６８５）。结论：二次ＬＡＳＩＫ手术是必要、安全、可行的。
OBJECTIVE: To evaluate the efficacy, predictability and safety of LASIK (LASIK) in correcting residual myopia. Methods: Forty patients (32 eyes) underwent bilateral surgery after LASIK. The interval between the two operations was 3 to 24 months. The patients were followed up for 3 days, 1, 3, and 6 months after the second operation respectively. Results: The mean uncorrected visual acuity (UCVA) of the eyes at each follow-up time was significantly higher than that before the operation (P <0.01), and the best corrected visual acuity (BCVA) was not significantly different from the preoperative values , The difference was significant (P <0.01). Increasing the appropriate cutting diameter could reduce the postoperative refractive regression (odds ratio = 2.685). Conclusion: Secondary LASIK is necessary, safe and feasible.