ABSTRACT

Purpose: To determine the optimal number of data points required for optimization of formulae for classical lens power calculation.

Methods: A large dataset of preoperative biometric values was used to assess the convergence of formula constants in a number of established intraocular lens power calculation formulae.

Results: In formulae with a single constant, 80–100 clinical data points are sufficient to obtain convergence. The Haigis formula (three constants) requires 200–300 data points although refractive error converges more rapidly.

Conclusions: In all formulae, 80–100 clinical data points are sufficient to achieve a stable mean refractive error.

摘要

目的：确定优化经典镜片度数计算公式所需的最佳数据点数。

方法: 使用大量术前生物特征值数据集来评估许多已建立的人工晶状体屈光度计算公式中公式常数的收敛性。

结果：在具有单个常数的公式中，80-100 个临床数据点足以获得收敛。Haigis 公式（三个常数）需要 200-300 个数据点，尽管屈光不正收敛得更快。

结论：在所有公式中，80-100 个临床数据点足以实现稳定的平均屈光不正。