iTrace像差仪在Toric人工晶状体植入术后轴位测量中的应用

摘要

Objective To research and evaluate measuring Toric intraocular lens (Toric IOL) alignment by iTrace aberration without mydriasis.Methods Forty-five eyes of 35 patients underwent phacoemulsification in Tianjin Medical University Eye Hospital from June 2015 to February 2016 were enrolled.Follow-up and iTrace aberration examination were performed at postoperative 1 week.The internal optics aberration astigmatism axis was transformed into postoperative Toric IOL alignment.The result and the Toric IOL alignment measured by tradition slitlamp method were compared by linear correlation and difference.Results At postoperative 1 week,the uncorrected distant visual acuity and corrected distant visual acuity were (0.19 ± 0.12)LogMAR and (0.10 ±0.09) LogMAR.The UCVA was 20/40 or better in 42 eyes (93.3％).The mean IOL misalignment measured by slitlamp was (3.13 ± 2.86) degrees (ranged 0-9 degrees) and by the iTrace aberration was (4.44 ± 3.42) degrees(ranged 0-13 degrees),there was statistical significant difference (t =-2.321,P =0.025).The mean difference in the error of the Toric intraocular lens alignment measured by iTrace aberration and the slitlamp was (3.67 ± 3.59) degrees (ranged 0-14 degrees).The results showed that there was less than 5 degrees of difference between the two methods in 32 eyes (71.1％),locate 5 to 10 degrees in 9 eyes (20％),more than 10 degrees in 4 eyes (8.9％).The correlation between the 2 methods showed significant linear relationship (r =0.926,P ＜ 0.01).Conclusion Using iTrace aberration can accurately measure Toric intraocular lens alignment without mydriasis,the result has some reference value.%目的 研究和评价利用iTrace像差仪在不散瞳情况下测量Torie人工晶状体(Toric intraocular lens,Toric IOL)轴位.方法 收集2015年6月至2016年2月在天津医科大学眼科医院接受超声乳化白内障吸出联合Toric IOL植入术的白内障患者35例(45眼),术后1周随访,并行iTrace像差仪的检查.用眼内像差散光轴位换算为术后Toric IOL轴位,结果与传统裂隙灯测得的Toric IOL轴位做比较,分析其差异及相关性.结果 患者术后1周裸眼视力和术后最佳矫正视力分别为(0.19 ±0.12)LogMAR和(0.10±0.09) LogMAR,42眼(93.3％)的裸眼视力≥20/40.传统裂隙灯法和iTrace法测得的Toric IOL轴位旋转分别为3.13°±2.86°(0°～9°)和4.44°±3.42°(0°～13°),两者比较差异有统计学意义(t=-2.321,P=0.025);两种方法测得的Toric IOL轴位差值的绝对值为3.67°±3.59°(0°～ 14°),差值结果中32眼(71.1％)＜5°,9眼(20.0％)为5°～10°,4眼(8.9％)＞10°.两种方法测得的Toric IOL轴位呈线性相关(r=0.926,P＜0.01).结论 运用iTrace像差仪可以在不散瞳的情况下准确测量Toric IOL轴位,其结果具有一定的参考价值.