Evaluation of a New All-in-One Optical Biometer and Comparison With a Validated Swept-source OCT Biometer

Abstract

Purpose: To assess agreement between a new all-in-one non-contact optical biometer based on optical low coherence reflectometry (SW-9000 µm Plus; Suoer) and a swept-source optical coherence tomography biometer (OA-2000; Tomey). Methods: Each eye was scanned three times in a row by each device at random. The measured ocular parameters included central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), axial length (AL), flat keratometry (Kf), steep keratometry (Ks), mean keratometry (Km), astigmatism, corneal diameter (CD), and pupil diameter (PD). The paired t test was used to show the differences between the SW-9000 and OA-2000. Bland-Altman plots and the 95% limits of agreement (LoA) were applied to assess the consistency of the measurements. Results: Sixty eyes from 60 healthy participants were examined, with a mean spherical equivalent refraction of −5.58 ± 2.31 diopters and a mean age of 30.40 ± 6.07 years. The Bland-Altman plots showed high agreement for AL, ACD, LT, Kf, Ks, Km, astigmatism, and CD measurements (95% LoA: −0.06 to 0.04 mm, −0.10 to 0.06 mm, −0.12 to 0.11 mm, −0.30 to 0.29 D, −0.35 to 0.38 D, −0.29 to 0.30 D, −0.30 to 0.34 D, and −0.50 to 0.06 mm, respectively), whereas the agreement for CCT and PD were moderate (95% LoA: 7.12 to 20.43 µm, −0.75 to 1.19 mm, respectively). Conclusions: The new all-in-one non-contact biometer had high agreement with the OA-2000 biometer on the AL, ACD, LT, Kf, Ks, Km, astigmatism, and CD measurements. For most of the ocular parameters assessed, they were clinically interchangeable. [ J Refract Surg . 2023;39(12):825–830.]