Repeatability of a fully automated swept-source optical coherence tomography biometer and agreement with a low coherence reflectometry biometer

Eye and Vision

Research

Alberto Domínguez-Vicent¹  Amanda Dalin¹  Rune Brautaset¹  Abinaya Priya Venkataraman¹  Robert Montés-Micó² 

[1] Division of Eye and Vision, Department of Clinical Neuroscience, Karolinska Institute, 171 77, Stockholm, Sweden;Optics and Optometry and Vision Sciences Department, University of Valencia, Valencia, Spain;

关键词: Optical biometry;    Swept-source optical coherence tomography;    Low-coherence interferometry;    Repeatability;    Agreement;   

DOI  :  10.1186/s40662-023-00343-4

 received in 2022-12-12, accepted in 2023-04-21,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundTo evaluate the repeatability of a fully automated swept-source optical coherence tomography (SS-OCT) and its agreement with an optical low coherence reflectometry (OLCR) for several biometric parameters.MethodsIn this study, 74 eyes of 74 patients were measured using the Eyestar 900 SS-OCT and Lenstar LS 900 OLCR. Flat keratometry (K1) and steep keratometry (K2), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), and axial length (AL) were measured three times with each device. The repeatability was analyzed with the intrasubject standard deviation, coefficient of variability (CoV), and coefficient of repeatability (CoR) for each instrument. The agreement between the instruments was evaluated with Bland-Altman analysis.ResultsK1, K2 and CCT CoV values were < 0.2%, < 0.4% and < 0.55%, respectively. Higher CoV values were found for ACD and LT ranging from 0.56% to 1.74%. The lowest CoV values were found for the AL measurements (0.03% and 0.06% for the Eyestar 900 and the Lenstar LS 900, respectively). AL measurements provided the highest repeatability, measured with both CoV and CoR values, and the CCT was the parameter with the lowest repeatability. The CCT and LT measurements were statistically significant between the two biometers (P < 0.001). The interval of the limits of agreement was < 0.6 D for K1 and K2, 15.78 µm for CCT, 0.21 mm for ACD, 0.34 mm for LT, and 0.08 mm for AL.ConclusionsBoth biometers provide repeatable measurements for the different parameters analyzed and can be used interchangeably.

【 授权许可】

CC BY   
© The Author(s) 2023

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