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

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（0.780.05）。结论：对于角膜正常B/F ratio白内障患者，Barrett Universal Ⅱ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 Universal Ⅱ公式计算IOL度数的准确性。

Effect of Corneal Normal B/FRatio on theAccuracy of Barrett Universal Formula for IOLCalculation

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 (0.780.05). Conclusions: For cataract patients with corneal normal B/F ratio, the prediction error is negatively correlated with the B/F ratio. The larger the B/F ratio, the more the prediction error drifts toward myopia. Conversely, hyperopic drifts. The regression formula of B/F ratio and prediction error is used to optimize the predicted postoperative SE, which could improve the accuracy of Barrett Universal II formula for calculating IOL.