Repeatability and agreement of the MYAH and Lenstar.

IF 1.6 4区医学 Q3 OPHTHALMOLOGY

Optometry and Vision Science Pub Date : 2024-03-01 DOI:10.1097/OPX.0000000000002113

Barsha Lal, Amy Cantrell, Lisa A Ostrin

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引用次数: 0

Abstract

Significance: Validation of new biometry instruments against the gold standard and establishing repeatability are important before being utilized for clinical and research applications.

Purpose: This study aimed to investigate intersession repeatability of the MYAH optical biometer and corneal topographer and examine agreement with the Lenstar LS900 optical biometer in healthy young adults.

Methods: Forty participants (mean age, 25.2 ± 3.1 years) presented for two visits, 2 to 4 days apart. At each visit, measurements for right eyes were collected with the MYAH and Lenstar LS 900 and included axial length, corneal power, white-to-white distance, and pupil diameter. Bland-Altman analysis was used to assess the intrasession agreement between the MYAH and Lenstar for each parameter and intersession repeatability for the two devices. For each device, coefficient of variation and intraclass correlation coefficient were calculated, and paired t tests between visits were performed to assess intersession repeatability.

Results: Good agreement (mean difference [95% limits of agreement]) between the MYAH and Lenstar was found for axial length (-0.01 [-0.07 to 0.04] mm), corneal power (-0.02 D [-0.15 to 0.19 d]), white-to-white distance (-0.13 [-0.43 to 0.17] mm), and pupil diameter (-0.27 [-0.79 to 1.33] mm). The limits of agreement, coefficient of variations, and intraclass correlation coefficients for MYAH-measured parameters were -0.04 to 0.04, 0.06%, and >0.99 for axial length; -0.24 to 0.19, 0.18%, and >0.99 for corneal power; -1.05 to 1.15, 0.57%, and 0.96 for white-to-white distance; and -0.17 to 0.21, 7.0%, and 0.76 for pupil diameter, with no significant difference between visits (p>0.05 for all), indicating good intersession repeatability. Similar intersession repeatability was also noted for Lenstar.

Conclusions: Findings show good intersession repeatability of the MYAH and good agreement with the Lenstar for axial length, corneal power, and white-to-white distance in young adults. Pupil diameter was more variable, likely due to the dynamic nature of the pupil. This study provides validation and supports the use of the MYAH for ocular biometry.

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MYAH 和 Lenstar 的重复性和一致性。

意义：目的：本研究旨在调查 MYAH 光学生物测量仪和角膜地形图仪在健康年轻人中的疗程间重复性，以及与 Lenstar LS900 光学生物测量仪的一致性：40 名参与者（平均年龄为 25.2 ± 3.1 岁）进行了两次就诊，每次间隔 2 到 4 天。每次就诊时，使用 MYAH 和 Lenstar LS900 采集右眼的测量数据，包括轴长、角膜功率、白-白距离和瞳孔直径。使用 Bland-Altman 分析法评估 MYAH 和 Lenstar 对每个参数的会话内一致性以及两个设备的会话间重复性。对每种设备都计算了变异系数和类内相关系数，并进行了两次访问之间的配对 t 检验来评估疗程间的可重复性：结果发现，MYAH 和 Lenstar 在轴长（-0.01 [-0.07 至 0.04] mm）、角膜强度（-0.02 D [-0.15 至 0.19 d]）、白-白距离（-0.13 [-0.43 至 0.17] mm）和瞳孔直径（-0.27 [-0.79 至 1.33] mm）方面具有良好的一致性（平均差 [95% 一致性限值]）。MYAH测量参数的一致性极限、变异系数和类内相关系数分别为：轴向长度-0.04至0.04、0.06%和>0.99；角膜强度-0.24至0.19、0.18%和>0.99；瞳孔直径-1.05至1.15、0.06%和>0.99。瞳孔直径为-0.17 至 0.21、7.0% 和 0.76，各次检查之间无显著差异（均为 p>0.05），表明各次检查之间具有良好的重复性。结论：结论：研究结果表明，MYAH 的各期重复性良好，与 Lenstar 在青壮年轴长、角膜强度和白-白距离方面的一致性也很好。瞳孔直径的变化较大，这可能是由于瞳孔的动态特性造成的。这项研究为使用 MYAH 进行眼部生物测量提供了验证和支持。

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

Optometry and Vision Science 医学-眼科学

CiteScore

2.80

自引率

7.10%

发文量

210

审稿时长

3-6 weeks

期刊介绍： Optometry and Vision Science is the monthly peer-reviewed scientific publication of the American Academy of Optometry, publishing original research since 1924. Optometry and Vision Science is an internationally recognized source for education and information on current discoveries in optometry, physiological optics, vision science, and related fields. The journal considers original contributions that advance clinical practice, vision science, and public health. Authors should remember that the journal reaches readers worldwide and their submissions should be relevant and of interest to a broad audience. Topical priorities include, but are not limited to: clinical and laboratory research, evidence-based reviews, contact lenses, ocular growth and refractive error development, eye movements, visual function and perception, biology of the eye and ocular disease, epidemiology and public health, biomedical optics and instrumentation, novel and important clinical observations and treatments, and optometric education.