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

PURPOSE: To assess agreement between a new all-in-one non-contact optical biometer based on optical low coherence reflectometry (SW-9000 mu m 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 kera-tometry (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 consis-tency of the measurements.RESULTS: Sixty eyes from 60 healthy participants were ex-amined, 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 mu m,-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.