Wavefront aberrometry repeatability and agreement—A comparison between Pentacam AXL Wave, iTrace and OPD‐Scan III

重复性 泽尼克多项式 波前 检影 均方根 协议限制 光学 组内相关 物理 再现性 数学 眼科 医学 核医学 视力 统计 折射误差 量子力学
作者
Kelvin H. Wan,Xu Lin Liao,Marco Yu,Rachel W. Y. Tsui,Vanissa W. S. Chow,Kelvin Kam Lung Chong,Tommy C.Y. Chan
出处
期刊:Ophthalmic and Physiological Optics [Wiley]
卷期号:42 (6): 1326-1337 被引量:10
标识
DOI:10.1111/opo.13047
摘要

Abstract Introduction To compare intrasession agreement and repeatability of wavefront aberration measurements from three different aberrometers obtained using Hartmann–Shack, ray tracing and automated retinoscopy methods, as well as their interdevice agreement. Methods Three consecutive measurements were obtained using the Pentacam AXL Wave, the iTrace and the OPD‐Scan III in 47 eyes of 47 patients. Wavefront refractions, root mean square of total aberrations (RMS total), RMS of higher‐order aberrations (HOA) and second‐, third‐ and fourth‐order HOAs were exported for 4‐mm pupils. Wavefront refractions were converted into vector components: M, J 0 and J 45 . Intrasession agreement and repeatability were evaluated using intraclass correlation coefficients (ICCs) and repeatability coefficients (RCs); interdevice agreement was assessed using the Bland–Altman method. Results The intrasession agreement and repeatability of RMS HOA were comparable between the three devices; both the Pentacam AXL Wave and the OPD‐Scan III had better intrasession agreement and repeatability for the RMS total than the iTrace ( p ≤ 0.02). Intrasession repeatability for the majority of second‐ and third‐order aberrations was better on the Pentacam AXL Wave than on the iTrace ( p ≤ 0.01) and OPD‐Scan III ( p ≤ 0.04), although their agreement and repeatability in spherical aberration were comparable ( p ≥ 0.24). Significant systematic differences and proportional bias were detected for almost all refraction power vectors and Zernike coefficients among the three devices. Conclusions In this study, all three devices provided good‐to‐excellent agreement for aberration measurements. Most of the individual Zernike's components were not exchangeable between different aberrometers. Their relative intrasession performance in agreement and repeatability varied significantly across different ocular aberration parameters.
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