泪膜稳定性对角膜屈光度测量及白内障手术计划的影响

IF 3.4

Advances in ophthalmology practice and research Pub Date : 2025-02-03 DOI:10.1016/j.aopr.2025.02.001

Yuanfeng Jiang , Xiteng Chen , Yichen Gao, Nan Gao, Huiyu Wang, Yanwen Feng, Meisa Li, Luning Qin, Fei Li, Shaozhen Zhao, Shaochong Bu, Fang Tian

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引用次数: 0

摘要

目的本前瞻性队列研究旨在评估泪膜稳定性对白内障患者角膜屈光度测量和手术计划的影响。方法根据角膜镜5M结果将患者分为泪膜不稳定（泪膜稳定性2级）组和对照组（0-1级）。使用IOL Master 700，连续两次测量，间隔10分钟。记录标准角膜屈光度（Kf、Ks和K）、角膜屈光度（KCA）、总角膜屈光度（TKf、TKs和TK）和角膜总散光（TCA）等参数。采用SRK-T、SRK-T TK、Haigis、Haigis TK、Barrett Universal II和Barrett Universal II TK公式计算人工晶状体度数。结果泪膜不稳定组的Kf、K、KCA、TKf、TK、TCA以及角膜散光的矢量变异性在两次测量中差异有显著性意义(P <；0.05)。在所有公式中，只有SRK-T公式在泪膜不稳定组的人工晶状体度数计算中显示出明显高于对照组的变异性(P <；0.05)。本研究强调泪膜不稳定会导致角膜屈光度数和散光测量的偏差，导致人工晶状体度数计算的预测误差增加，尤其是SRK-T公式。

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Impact of tear film stability on corneal refractive power measurement and surgical planning for cataract

Purpose

This prospective cohort study aimed to assess the influence of tear film stability on corneal refractive power measurement and surgical planning in cataract patients.

Methods

Participants were divided into tear film instability (tear film stability level 2) and control (level 0–1) groups based on Keratograph 5M results. Using IOL Master 700, two consecutive measurements were obtained with a 10-min interval. Parameters including standard keratometry (Kf, Ks and K), keratometric corneal astigmatism (KCA), total keratometry (TKf, TKs and TK) and total corneal astigmatism (TCA) were recorded. IOL power was calculated using SRK-T, SRK-T TK, Haigis, Haigis TK, Barrett Universal II, and Barrett Universal II TK formulas.

Results

The results showed significantly higher differences between two measurements in Kf, K, KCA, TKf, TK, and TCA, as well as the vector variability of corneal astigmatism in the tear film instability group (all P < 0.05). Of all formulas, only the SRK-T formula displayed significantly higher variability in IOL power calculations in the tear film instability group compared to the control group (P < 0.05).

Conclusions

This study highlights that tear film instability can lead to deviations in corneal refractive power and astigmatism measurements, contributing to increased prediction errors in IOL power calculation, particularly with the SRK-T formula.

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来源期刊

Advances in ophthalmology practice and research Ophthalmology

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

66 days