角膜曲率计
人工晶状体
白内障手术
折射
数学
眼科
生物特征数据
平均绝对误差
协议限制
人工晶状体度数计算
医学
光学
角膜
核医学
物理
生物识别
计算机科学
均方误差
统计
计算机安全
作者
Julio Narváez,Grenith Zimmerman,R. Doyle Stulting,Daniel H. Chang
出处
期刊:Journal of Cataract and Refractive Surgery
[Ovid Technologies (Wolters Kluwer)]
日期:2006-12-01
卷期号:32 (12): 2050-2053
被引量:162
标识
DOI:10.1016/j.jcrs.2006.09.009
摘要
To compare the accuracy of intraocular lens (IOL) power calculations using 4 formulas: Hoffer Q, Holladay 1, Holladay 2, and SRK/T.Tertiary care center.This study was a retrospective comparative analysis. Immersion ultrasound biometry (axial length, anterior chamber depth, and lens thickness), manual keratometry, and postoperative manifest refraction were obtained in 643 eyes of consecutive patients who had routine uneventful cataract surgery with implantation of 1 of 2 IOLs using the same operative technique by the same surgeon. Biometric data were entered into each of the 4 IOL power calculation formulas, and the results were compared to the final manifest refraction. An optimized lens constant was used for each formula. Results were also stratified into groups of short, average, medium long, and very long axial length <22.0 mm, 22.0 to <24.5 mm, 24.5 to 26.0 mm, and >26.0 mm, respectively).No formula was more accurate than the others as measured by mean absolute error. The formulas were also equally accurate when eyes were stratified by axial length.The 4 IOL power formulas provided equivalent refractive results in the entire group of eyes and in the subsets of axial lengths tested.
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