准分子激光屈光性角膜切削术与原位角膜磨镶术矫治远视的疗效比较:1年随访

目的对准分子激光屈光性角膜切削术(photorefractive keratectomy,PRK)和准分子激光原位角膜磨镶术(1aser in situ keratomeleusis,LASIK)联合可蚀盘矫治远视进行观察比较.方法使用可蚀盘联合三棱镜抛光技术,对25例患者40只远视眼(PRK16眼,LASIK24眼)进行矫治.术前屈光度(+1.62～+6.25)D.对两种术式屈光度、视力等进行比较.结果随访时间12个月.最佳矫正远视力丢失两行以上PRK组2眼(12.5%),LASIK组3眼(12.5%);最佳矫正近视力丢失两行以上PRK组1眼(6.3%),LASIK组2眼(8.3%).平均裸眼远视力PRK组为0.55,LASIK组为0.68;而平均裸眼近视力PRK组为0.66,LASIK组为0.85.残余屈光度在-1.00D～+1.00D之间PRK组12眼(75.0%),LASIK组20眼(83.3%).平均回退量术后1～3个月,PRK组为0.95D,LASIK组为0.76D;术后3～6个月,两组分别为0.35和0.08 D;术后6～12个月,两组分别为-0.22和0.00D.在各阶段中两种术式比较差异均有显著意义.结论使用可蚀盘联合三棱镜矫治远视是安全的,PRK与LASIK两者方法均可获得满意的远期疗效.但LASIK较PRK更容易稳定且有效性和预测性更好.

Comparison of the therapeutic effectiveness of excimer laser photorefractive keratectomy and in situ keratomeleusis in hyperopia:A one-year follow-up

AIM: To observe and compare the effectiveness of excimer laser photorefreactive keratectomy(PRK) and excimer laser in situ keratomeleusis(LASIK) united with PMMA disk in the treatment of hyperopia.METHODS: Forty eyes with hyperopia in 25 patients(16 eyes treated by PRK and 24 eyes treated by LASIK) were corrected by PMMA disk united with bevelled mirror polishing techniques. Dioptry before sursery was from +1.62 to + 6. 25D. The dioptry and visual acuity were compared between both techniques.RESULTS: A 12-month follow-up was performed. There were 2 eyes (12. 5% ) in PRK and 3 eyes(12.5% ) in LASIK group lost above 2 lines of the optimized corrected distance visual acuity. There were 1 eye(6.3% ) in PRK and 2 eyes(8.3% ) in LASIK group lost above 2 lines of the optimized corrected visual acuity at reading distance. The mean uncorrected distance visual acuity of PRK group was 0. 55, and LASIK group was 0. 68; and the mean uncorrected visual acuity at reading distance of PRK group was 0.66and LASIK group was 0. 85. There were 12 eyes(75% ) in PRK group and 20 eyes(83.3% ) in LASIK group have a residual dioptry between-1.00 Dand + 1. 00 D. The mean receding after 1 to 3-month surgery was 0.95 D in PRK group and 0. 76 D in LASIK group, and 0. 35 D and 0. 08 D respectively in two groups after 3 to 6-month surgery, and-0. 22 D and 0.00 Drespectively in two groups after 6 to 12-month surgery. There were significant differences in each phase between two techniques.CONCLUSION: It is safe to introduce PMMA disk united with bevelled mirror to correct hyperopia. Both PRK and LASIK can obtain satisfied long-term effectiveness, but LASIK with more stability and effectiveness as well as prediction.