矢量分析法评价眼内散光对飞秒激光LASIK治疗散光的影响

摘要

Objective To investigate the influence of ocular residual astigmatism (ORA) on the correction of astigmatism by FS-LASIK with vector analysis.Methods The records of 182 patients who had accept FS-LASIK between January,2016 and April,2016 were retrosepectively reviewed.The patients whose ORA ≥ refractive cylinder were assigned to high ocular residual astigmatism group (HORA group),ORA ＜ refractive cylinder were assigned to low ocular residual astigmatism group (LORA group).All of the patients were followed 6 months or more.The visual acuity,error ratio and correction ratio were compared between HORA group and LORA group.Results The preoperative ORA of all patients was (0.61 ± 0.27) D,in which ＞ 0.75 D were 58 cases (31.9％),and the HORA group was more than the LORA group (P ＜ 0.05).At postoperative 6 months,there was no statistically significant difference in vision acuity between the HORA group (1.06 ± 0.15) and LORA group (1.08 ± 0.15) (t =0.97,P =0.35).There was statistically significant difference in the error ratio between the HORA group (58.11 ± 63.23) ％ and LORA group (26.12 ± 35.37) ％ (t =3.43,P ＜ 0.05).There was statistically significant difference in the correction ratio between the HORA group (146.45 ± 86.63) ％ and LORA group (122.56 ± 36.31) ％ (t =2.81,P ＜ 0.05).Conclusion The error ratio and correction ratio of astigmatic correction by FSLASIK is significantly higher in eyes with high ORA than in eyes with low ORA.Vector analysis should been carried out before the FS-LASIK.%目的 应用矢量分析法评价眼内散光(ocular residual astigmatism,ORA)对飞秒激光LASIK治疗散光的影响.方法 收集2016年1月至4月在我院行飞秒激光LASIK的患者182例.应用矢量分析法计算ORA,ORA大于等于散光的为高眼内散光组(high ocular residual astigmatism group,HORAG),反之则为低眼内散光组(low ocular residual astigmatism group,LORAG).术后随访6个月,比较两组裸眼视力以及散光矫正率和误差率.结果 术前所有患者ORA为(0.61±0.27)D,其中超过0.75D者58例(31.9％);HORAG患者的ORA大于LORAG患者,两组差异有统计学意义(P＜0.05).术后6个月HORAG患者裸眼视力为1.06 ±0.15,LORAG患者裸眼视力为1.08 ±0.15,两组差异无统计学意义(t=0.97、P=0.35);HORAG误差率(58.11±63.23)％大于LORAG(26.12±35.37)％,两组差异有统计学意义(t=3.43、P＜0.05);HORAG矫正率(146.45±86.63)％较LORAG(122.56±36.31)％大,两组差异有统计学意义(t=2.81、P＜0.05).结论 ORA较大时增加飞秒激光LASIK治疗散光的误差率,影响散光矫正率,进行屈光手术前应进行散光来源分析.