Toric Intraocular Lens Calculations in Eyes With Corneal Ectasia.

IF 3 3区医学 Q1 OPHTHALMOLOGY

Journal of refractive surgery Pub Date : 2025-06-01 DOI:10.3928/1081597X-20250424-01

Olga Reitblat, Rita Zlatkin, Nili Golan, Lior Or, Adi Einan-Lifshitz, Uri Elbaz, Irit Bahar, Ruti Sella

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引用次数: 0

Abstract

Purpose: To analyze the accuracy of astigmatism correction in patients with corneal ectasia, using various toric intraocular (IOL) calculators.

Methods: Consecutive patients with corneal ectasia and a regular astigmatic component, who underwent cataract extraction with implantation of a toric IOL, were retrospectively reviewed. The predicted postoperative refractive astigmatism (RA) was calculated with the Barrett True K (BTK) toric calculator using predicted and measured posterior corneal astigmatism (PPCA and MPCA, respectively), both with and without the Integrated Keratometry (IK) tool. In addition, the Kane toric calculator was used, with its keratoconus function. Based on the manifest postoperative refraction, the error in the predicted astigmatism was calculated for each method.

Results: Compared in 36 eyes of 28 patients, IK-PPCA (0.09 diopters [D] @ 76) showed the lowest trimmed mean centroid prediction error for RA, followed by IK-MPCA (0.11 D @ 7), BTKMPCA (0.12 D @ 55), Kane-Keratoconus (0.15 D @ 78) and BTKPPCA (0.28 D @ 82). BTK-PPCA was the only method that significantly deviated from zero (P = .038), and significantly differed from BTK-MPCA (P = .013), IK-PPCA (P = .009), and IK-MPCA (P = .003). IK-MPCA led in precision and accuracy (trimmed mean 0.66 D and 0.67 D, respectively), but not significantly vs IK-PPCA (0.73 D, 0.74 D), BTK-MPCA (0.78 D, 0.79 D), Kane Keratoconus (0.80 D, 0.80 D), and BTK-PPC (0.84 D, 0.88 D).

Conclusions: The use of multiple measurements, provided by the IK calculator, enhanced astigmatism correction with toric IOLs in eyes with corneal ectasia. The variability in ectatic corneas likely benefits from a multi-measurement approach. [J Refract Surg. 2025;41(6):e558-e568.].

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角膜扩张眼环形人工晶状体的计算。

目的：分析不同环形人工晶状体（IOL）度量器对角膜膨大患者散光矫正的准确性。方法：回顾性分析连续行白内障摘出并人工晶状体植入术的角膜扩张和常规散光患者。预测术后屈光散光（RA）使用Barrett True K （BTK）环形计算器计算，使用预测和测量后角膜散光（分别为PPCA和MPCA），使用和不使用综合角膜测量（IK）工具。此外，还使用了具有圆锥角膜功能的凯恩托力计算器。根据术后明显屈光，计算各方法预测散光的误差。结果：与28例36眼患者相比，IK-PPCA（0.09屈光度[D] @ 76）显示RA的切面平均质心预测误差最低，其次是IK-MPCA （0.11 D @ 7）、BTKMPCA （0.12 D @ 55）、kane - conatous （0.15 D @ 78）和BTKPPCA （0.28 D @ 82）。BTK-PPCA是唯一与零有显著偏差的方法（P = 0.038），与BTK-MPCA （P = 0.013）、IK-PPCA （P = 0.009）、IK-MPCA （P = 0.003）有显著差异。IK-MPCA在精密度和准确度上领先（修剪后的平均值分别为0.66 D和0.67 D），但与IK-PPCA （0.73 D, 0.74 D）、BTK-MPCA （0.78 D, 0.79 D）、Kane角膜圆锥（0.80 D, 0.80 D）和BTK-PPC （0.84 D, 0.88 D）相比没有显著性差异。结论：使用IK计算器提供的多种测量，可增强角膜扩张眼环形人工晶状体的散光矫正。扩张性角膜的可变性可能受益于多种测量方法。[J].中华眼科杂志，2015;41(6):558- 568。

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.