Accuracy of keratoconus-specific formulae compared to standard formulae for intraocular lens power calculation in patients with keratoconus.

IF 3.3 4区医学 Q1 OPHTHALMOLOGY

Canadian journal of ophthalmology. Journal canadien d'ophtalmologie Pub Date : 2025-02-22 DOI:10.1016/j.jcjo.2025.01.005

Nicolás Kahuam-López, Jennifer Ym Ling, Alfonso Iovieno, Sonia N Yeung

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引用次数: 0

Abstract

Objective: To compare the accuracy of keratoconus-specific formulae for nontoric and toric intraocular lenses in eyes with keratoconus undergoing cataract surgery.

Design: Consecutive retrospective case series.

Participants: Patients with keratoconus who underwent cataract surgery.

Methods: A retrospective chart review was conducted on cataract surgeries performed by the Cornea Service in the Department of Ophthalmology and Visual Sciences of the University of British Columbia from 2000 to 2023. The Kane keratoconus, Kane, Barrett Universal 2, Barrett True K, SRK II, SRK/T, Hoffer Q, Holladay I, EVO, Hill RBF and Hoffer QST, and Pearl DGS formulae were calculated. The postoperative mean absolute error (MAE) and mean prediction error (MPE) were calculated for each formula.

Results: A total of 133 eyes from 88 patients were eligible for inclusion in the study, 113 from 74 patients received nontoric IOLs, and 20 from 14 patients received toric IOLs. Pearl DGS had the most myopic MPE of -0.51 ± 1.04, which was statistically significant (p < 0.001) compared to all other formulae. There were no statistically significant differences in the MPE and MAE of the Kane keratoconus, Kane, Barrett Universal 2, Barrett True K keratoconus-specific formula, SRK II, SRK/T, Hoffer Q, Holladay I, EVO, Hill RBF and Hoffer QST formulae (p > 0.05).

Conclusion: There was no difference in IOL power estimation accuracy with keratoconus-specific formulae compared to conventional formulae for cataract surgery in KC patients. The IOL power estimation in KC remains significantly less accurate compared with non-KC patients.

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圆锥角膜特异性配方与标准配方在计算圆锥角膜患者人工晶状体度数时的准确性比较。

目的：比较圆锥角膜患者行白内障手术后非晶状体人工晶状体配方与晶状体配方的准确性。设计：连续的回顾性病例系列。参与者：接受白内障手术的圆锥角膜患者。方法：对2000 ~ 2023年英属哥伦比亚大学眼科与视觉科学系角膜科白内障手术病例进行回顾性统计分析。计算Kane圆锥角膜、Kane、Barrett Universal 2、Barrett True K、SRK II、SRK/T、Hoffer Q、Holladay I、EVO、Hill RBF、Hoffer QST和Pearl DGS公式。计算各公式的术后平均绝对误差（MAE）和平均预测误差（MPE）。结果：88例患者共133只眼纳入研究，74例患者中有113只接受了非晶状体iol， 14例患者中有20只接受了晶状体iol。Pearl DGS的近视MPE最高，为-0.51±1.04，与其他配方相比，差异有统计学意义（p < 0.001）。Kane圆锥角膜、Kane、Barrett Universal 2、Barrett True K圆锥角膜特异性公式、SRK II、SRK/T、Hoffer Q、Holladay I、EVO、Hill RBF、Hoffer QST公式的MPE和MAE比较，差异均无统计学意义（p < 0.05）。结论：在KC患者白内障手术中，角膜圆锥特异性配方与常规配方相比，人工晶状体度数估算精度无显著差异。与非KC患者相比，KC患者的IOL功率估计仍显着低于KC患者。

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

Canadian journal of ophthalmology. Journal canadien d'ophtalmologie 医学-眼科学

CiteScore

3.20

自引率

4.80%

发文量

223

审稿时长

38 days

期刊介绍： Official journal of the Canadian Ophthalmological Society. The Canadian Journal of Ophthalmology (CJO) is the official journal of the Canadian Ophthalmological Society and is committed to timely publication of original, peer-reviewed ophthalmology and vision science articles.