Teixeira Eloisa Gomes Rosario M, Gomes Beatriz Fiuza, Santana João Dominice, Santhiago Marcony R, Costa Adroaldo Alencar, Moraes Haroldo V
Department of Ophthalmology, Hospital Federal de Bonsucesso, Rio de Janeiro, RJ, Brazil.
Department of Ophthalmology, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Arq Bras Oftalmol. 2022 Jul 15;86(6). doi: 10.5935/0004-2749.2021-0325.
The purpose of this study was to compare the white-to-white distance measurements of two devices (IOL Master 500 and Atlas corneal topographer) commonly used in clinical practice to determine if they were interchangeable. Providing information on instrument interchangeability could eliminate several unnecessary tests and consequently reduce the economic burden for the patient and society.
In this prospective, comparative case series, the white-to-white distance was measured by independent examiners using the Atlas topographer (Carl Zeiss Meditec) and the IOL Master 500 (Carl Zeiss Meditec). One eye each of 184 patients was tested. Statistical analyses were performed using a paired t-test, Pearson correlation analysis, and Bland-Altman analysis to compare the measurement methods.
The mean white-to-white distance measurements with the Atlas topographer and the IOL Master 500 were 12.20 ± 0.44 mm and 12.12 ± 0.41 mm, respectively (p<0.001). The mean white-to-white difference between the two devices was 0.07 mm (95% confidence interval of mean difference: 0.04-0.11 mm). The Pearson correlation coefficient between the two devices was 0.85 (p<0.0001). The 95% limits of agreement between the two devices were -0.38 mm to 0.53 mm.
The Atlas topographer and IOL Master 500 can be used interchangeably with respect to white-to-white distance measurements, as the range of differences is unlikely to affect clinical practice and decision making.
本研究旨在比较临床实践中常用的两种设备（IOL Master 500和阿特拉斯角膜地形图仪）测量的白对白距离，以确定它们是否可互换。提供关于仪器互换性的信息可以消除一些不必要的检查，从而减轻患者和社会的经济负担。
在这个前瞻性比较病例系列中，由独立检查人员使用阿特拉斯角膜地形图仪（卡尔蔡司医疗技术公司）和IOL Master 500（卡尔蔡司医疗技术公司）测量白对白距离。对184例患者的单眼进行了测试。使用配对t检验、Pearson相关分析和Bland-Altman分析进行统计分析，以比较测量方法。
使用阿特拉斯角膜地形图仪和IOL Master 500测量的白对白距离平均值分别为12.20±0.44毫米和12.仁±0.41毫米（p<0.001）。两种设备之间的白对白平均差异为0.07毫米（平均差异的95%置信区间：0.04-0.11毫米）。两种设备之间的Pearson相关系数为0.85（p<0.0001）。两种设备之间的95%一致性界限为-0.38毫米至0.53毫米。
就白对白距离测量而言，阿特拉斯角膜地形图仪和IOL Master 500可以互换使用，因为差异范围不太可能影响临床实践和决策。
