利用经验数据改进人工晶状体屈光力计算

Improvement of intraocular lens power calculation using empirical data.

作者信息

Sanders D R, Kraff M C

出版信息

J Am Intraocul Implant Soc. 1980 Jul;6(3):263-7. doi: 10.1016/s0146-2776(80)80075-9.

Abstract

A simple lens power calculation formula of the form: Predicted implant power = A + B X axial length + C X keratometry, can be produced with different constants (A, B, and C) for each type of lens implant and each manufacturer. We have determined the constants for iris-fixated, anterior chamber and posterior chamber lens implants, based on data from 923 cases. The results have been more accurate than those from presently available theoretical formulas, and the well-known phenomenon of predicting too much dioptric power in eyes with short axial lengths has been avoided. Only 1% of the cases had a predicted lens power more than 3 diopters in error.

摘要

可以针对每种类型的晶状体植入物和每个制造商，通过不同的常数（A、B和C）得出一个简单的晶状体屈光度计算公式：预测植入屈光度=A+B×眼轴长度+C×角膜曲率。我们根据923例病例的数据，确定了虹膜固定型、前房型和后房型晶状体植入物的常数。结果比目前可用的理论公式更准确，并且避免了在眼轴长度短的眼睛中预测屈光度过高这一众所周知的现象。只有1%的病例预测的晶状体屈光度误差超过3屈光度。