角膜正常B/F Ratio对Barrett Universal Ⅱ公式计算IOL度数准确性的影响  

Effect of Corneal Normal B/F Ratio on the Accuracy of Barrett Universal Formula for IOL Calculation

作　　者：吴万民 柴飞燕[1] 刘杰为[1] Wanmin Wu;Feiyan Chai;Jiewei Liu(Department of Second Cataract,Shanxi Eye Hospital,Taiyuan 030000,China)

机构地区：[1]山西省眼科医院白内障二科,太原030000

出　　处：《中华眼视光学与视觉科学杂志》2023年第1期62-67,共6页Chinese Journal Of Optometry Ophthalmology And Visual Science

基　　金：山西省眼科医院院内科研基金(Q201902)。

摘　　要：目的:探讨角膜正常后前表面曲率半径之比(B/F ratio)对Barrett Universal Ⅱ公式计算人工晶状体(IOL)度数准确性的影响。方法:回顾性系列病例研究。连续纳入2019年9月至2020年12月在山西省眼科医院行超声乳化白内障联合IOL植入术且角膜B/F ratio(0.78<B/F ratio<0.85)正常的所有白内障患者63例(63眼),分析患者术前Pentacam HR眼前段分析仪测量结果、OA2000生物测量仪检查结果及术后1个月患者的主觉验光结果等临床资料。采用预测误差[PE,PE=术后主觉验光等效球镜度(SE)-预计术后SE]、平均预测误差(ME)、绝对预测误差(APE,APE=|PE|)、平均绝对误差(MAE)、绝对误差中位数(Med AE)及APE≤0.5 D总占比、APE≤1.0 D总占比分析IOL计算度数的准确性。采用Spearman相关性分析PE与B/F ratio的相关性,建立PE与B/F ratio线性回归方程并优化预计术后SE。采用Wilcoxon检验及卡方检验分析优化前后IOL计算度数准确性的变化。结果:术后ME为(-0.09±0.41)D,MAE为(0.31±0.29)D,Med AE为0.24 D,APE≤0.5 D总占比79%,APE≤1.0 D总占比95%。B/F ratio与PE呈负相关(r=-0.27,P=0.035),B/F ratio与PE线性回归方程为:PE=-10.838×B/F ratio+8.8148(R=0.36)。优化后ME为(0±0.38)D,MAE为(0.31±0.23)D,APE≤0.5 D总占比83%,APE≤1.0 D总占比98%。优化后ME减小,差异有统计学意义(Z=-4.05,P<0.001)。优化前后MAE、APE≤0.5 D总占比及APE≤1.0 D总占比比较,差异均无统计学意义(均P>0.05)。结论:对于角膜正常B/F ratio白内障患者,Barrett UniversalⅡ公式计算IOL,B/F ratio越大,PE越向近视漂移;反之,向远视漂移。通过B/F ratio与PE的回归公式优化预计术后SE可以提高Barrett UniversalⅡ公式计算IOL度数的准确性。Objective:To investigate the effect of corneal normal back-front radius ratio(B/F ratio)on the accuracy of Barrett Universal formula for calculating the refractive power of intraocular lens(IOL).Methods:This retrospective analysis focused on the clinical data of 63 patients(63 eyes)with cataracts and a normal corneal back-front radius ratio(0.78<B/F ratio<0.85)who underwent phacoemulsification with intraocular lens implantation in Shanxi Eye Hospital from September 2019 to December 2020 were consecutively enrolled and corresponding measurement results of preoperative Pentacam HR anterior segment analyzer,OA2000 biometrics and subjective optometry 1 month after surgery were analyzed.Prediction error[PE,PE=postoperative subjective refraction spherical equivalent(SE)-predicted postoperative SE],mean prediction error(ME),absolute prediction error(APE,APE=|PE|),mean absolute error(MAE),median absolute error(Med AE),APE within 0.5 D,APE within 1.0 D were used to analyze the accuracy of IOL calculation.Spearman correlation analysis was used to analyze the correlation between PE and B/F ratio,and a linear regression equation of PE and B/F ratio was established to optimize the predicted postoperative SE.Wilcoxon test and Chi-square test were used to analyze the changes in the accuracy of IOL calculation before and after optimization.Results:Postoperative ME was-0.09±0.41 D,MAE was 0.31±0.29 D,Med AE was 0.24 D,APE 0.5 D accounted for 79%,and APE 1.0 D accounted for 95%.B/F ratio was negatively correlated with PE(r=-0.27,P=0.035).The linear regression equation between B/F ratio and PE was:PE=-10.838×B/F ratio+8.8148(R=0.36).After optimization,ME was 0±0.38 D,MAE was 0.31±0.23 D,APE 0.5 D accounted for 83%,and APE 1.0 D accounted for 98%.There was a statistically significant difference in ME before and after optimization(Z=-4.05,P<0.001).There was no significant difference in MAE,APE within 0.5 D,and APE within 1.0 D before and after optimization(P>0.05).Conclusions:For cataract patients with corneal normal B/F ratio,t

关 键 词：白内障 人工晶状体 Barrett UniversalⅡ公式 角膜后前表面曲率半径之比 

分 类 号：R779.6[医药卫生—眼科]