Accuracy of Intraocular Lens Power Calculation Formulas Using Total Keratometry in Eyes With Previous Radial Keratotomy.

IF 3 3区医学 Q1 OPHTHALMOLOGY

Journal of refractive surgery Pub Date : 2026-04-01 DOI:10.3928/1081597X-20260112-07

Yuxing Zheng, Haowen Lin, Xiaohang Xie, Xiaozhang Qiu, Xuhua Tan, Jiaqing Zhang, Lixia Luo

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引用次数: 0

Abstract

Purpose: To evaluate the performance of intraocular lens (IOL) power calculation using standard keratometry (SK) and total keratometry (TK) in eyes after radial keratotomy (RK) surgery.

Methods: A retrospective, consecutive case series study included 49 patients with cataract (65 eyes) after RK. All implanted IOLs were monofocal in-the-bag lenses. Formulas using SK included American Society of Cataract and Refractive Surgery (ASCRS) average, Barrett True K, double-K modified Holladay 1 formula (DK-Holladay), Emmetropia Verifying Optical formula 2.0 (EVO 2.0), Holladay 1, Holladay 2, PEARL-DGS, and LISA formula for patients with cataract and prior myopic refractive surgery (LISA-MRS). Formulas using TK included Barrett True K-TK, EVO 2.0-TK, Holladay 2-TK, and LISA-MRS-TK. Holladay formulas used both Wang-Koch (Holladay-WK) and Holladay axial length (Holladay-AL) adjustment. The mean prediction error (PE), mean absolute PE (MAE), median absolute error (MedAE), root mean square absolute error (RMSAE), and the percentage of eyes within ±0.25, ±0.50, ±0.75, and ±1.00 diopters (D) of PE were evaluated.

Results: In formulas using SK, the LISA-MRS formula exhibited the lowest MAE (0.71 D), lowest MedAE (0.52 D), and highest percentage of eyes within ±0.50 D of PE (49.23%). In formulas using TK, the LISA-MRS-TK formula exhibited the lowest MAE (0.78 D), lowest MedAE (0.48 D), and highest percentage of eyes within ±0.50 D of PE (52.63%). Using TK instead of SK significantly reduced the PE of both the Holladay 2 and LISA-MRS formulas. When AL was 30 mm or greater, the Holladay 1-AL formula exhibited the lowest MAE (0.68 D), lowest MedAE (0.32 D), and the highest percentage of eyes within ±0.50 D of PE (59.09%).

Conclusions: In post-RK eyes, the LISA-MRS formula displayed the highest prediction accuracy. TK could improve the prediction accuracy of the Holladay 2 and LISA-MRS formulas.

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桡骨角膜切开术后全角膜测量法计算人工晶状体度数公式的准确性。

目的：评价桡骨角膜切开术（RK）术后用标准角膜测量术（SK）和全角膜测量术（TK）计算人工晶状体（IOL）度数的效果。方法：对49例（65眼）RK术后白内障患者进行回顾性、连续的病例系列研究。所有人工晶状体均为单焦点袋内晶体。使用SK的配方包括美国白内障和屈光手术协会（ASCRS）的平均配方、Barrett True K配方、双K改良Holladay 1配方（DK-Holladay）、近视验证光学配方2.0 （EVO 2.0）、Holladay 1、Holladay 2、PEARL-DGS以及白内障和既往近视屈光手术患者的LISA配方（LISA- mrs）。使用TK的配方包括Barrett True K-TK、EVO 2.0-TK、Holladay 2-TK和LISA-MRS-TK。Holladay公式同时使用Wang-Koch （Holladay- wk）和Holladay轴向长度（Holladay- al）调整。评估平均预测误差（PE）、平均绝对误差（MAE）、中位数绝对误差（MedAE）、均方根绝对误差（RMSAE）以及PE在±0.25、±0.50、±0.75和±1.00屈光度(D)范围内的眼睛百分比。结果：在使用SK的配方中，LISA-MRS配方的MAE最低（0.71 D）， MedAE最低（0.52 D）， PE±0.50 D内的眼睛百分比最高（49.23%）。在使用TK的配方中，LISA-MRS-TK配方的MAE最低（0.78 D）， MedAE最低（0.48 D）， PE±0.50 D内的眼睛百分比最高（52.63%）。使用TK代替SK显著降低了Holladay 2和LISA-MRS公式的PE。当AL≥30 mm时，Holladay 1-AL配方的MAE最低（0.68 D）， MedAE最低（0.32 D）， PE±0.50 D内的眼占比最高（59.09%）。结论：在rk后眼中，LISA-MRS公式的预测准确率最高。TK可提高Holladay 2和LISA-MRS公式的预测精度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

$Journal of refractive surgery$

Journal of refractive surgery 医学-外科

CiteScore

5.10

自引率

12.50%

发文量

160

审稿时长

4-8 weeks

期刊介绍： The Journal of Refractive Surgery, the official journal of the International Society of Refractive Surgery, a partner of the American Academy of Ophthalmology, has been a monthly peer-reviewed forum for original research, review, and evaluation of refractive and lens-based surgical procedures for more than 30 years. Practical, clinically valuable articles provide readers with the most up-to-date information regarding advances in the field of refractive surgery. Begin to explore the Journal and all of its great benefits such as: • Columns including “Translational Science,” “Surgical Techniques,” and “Biomechanics” • Supplemental videos and materials available for many articles • Access to current articles, as well as several years of archived content • Articles posted online just 2 months after acceptance.