方法：对接受LASIK治疗近视术后≥8a的患者术前及术后的裸眼视力、屈光度、角膜曲率、角膜厚度及并发症等情况进行回顾性分析。按术前屈光度数分3组：A组-1.00～ -6.00D者92眼，B组-6.25～-10.00D者68眼，C组≥-10.00D者27眼。

结果：术后≥8a三组裸眼视力≥1.0者依次为73.9%，52.9%，22.2%，平均屈光度数分别为-0.21±0.06，-0.54±0.12，-2.33±0.36D。术后≥8a屈光度在±1.00D范围内占83.4%，±0.50D范围内占59.4%，A组与B，C组分别比较，差异有统计学意义(P<0.05)。术后≥8a屈光度与术后1a比较，屈光度回退≥1.00D占9.09%。

结论：LASIK治疗近视手术安全有效、预测性好，远期疗效稳定； 特别是对于低中度近视眼患者可获得更为满意的治疗效果。

METHODS:A retrospective analysis of the uncorrected visual acuity(UCVA), refractive diopters, corneal curvature, central corneal thickness and postoperative complications were performed for the people who has accepted the operation for at least 8 years. The patients were divided into three groups according to their degree of preoperative myopia: -1.00～-6.00D of 92 eyes were in group A; -6.25～-10.00D of 68 eyes in group B; ≥-10.00D of 27 eyes in group C.

RESULTS: More than 8 years after the operation, the UCVA≥1.0 were 73.9%, 52.9% and 22.2% and the refractive diopters were -0.21±0.06D, -0.54±0.12D, -2.33±0.36D in each group. The residual refractive error within ±1.00D was 83.4% and within ±0.50D was 59.4%. There were significant differences between group A and group B/C(P<0.05). More than 8 years after LASIK compared with that one year after the operation, the refractive regression more than 1.00D accounted for 9.09%.

CONCLUSION: LASIK for the treatment of myopia is safe, effective, predictable and stable. Especially for the low to moderate myopia patients who can obtain more satisfactory treatment effect.