Comparison of 2 swept-source optical coherence tomography–based biometry devices

PURPOSE: To compare 2 swept-source optical coherence tomography (SS-OCT) biometers, IOLMaster 700 (biometer A), and ANTERION (biometer B). SETTING: Department of Ophthalmology, Vienna Institute for Research in Ocular Surgery, Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria. DESIGN: Retrospective study. METHOD: Biometric measurements of cataract patients performed between June and July 2019 were reviewed. Patients scheduled for cataract surgery were measured with both SS-OCT devices on the same day. The following biometry parameters were compared: keratometry, central corneal thickness, anterior chamber depth (ACD), lens thickness (LT), and axial length (AL). RESULT: In total, 389 eyes of 209 subjects were measured with both devices. The mean absolute difference between the keratometry data of the 2 devices was 0.04 ± 0.05 mm (7.80 ± 0.26 mm for biometer A and 7.82 ± 0.26 mm for biometer B; P < .0001) for the steep keratometry readings and 0.04 ± 0.04 mm (7.63 ± 0.26 mm and 7.65 ± 0.25 mm; P < .0001) for the flat keratometry readings. For ACD and LT, the mean absolute difference was 0.07 ± 0.04 mm and 0.07 ± 0.04 mm. The mean absolute difference for AL was 0.02 ± 0.03 mm (23.55 ± 1.18 mm for biometer A and 23.54 ± 1.18 mm for biometer B; P < .0001). CONCLUSIONS: Good agreement was found between the 2 devices, with a minor offset for ACD and LT measurements. Although differences were found to be small, the devices should not be used interchangeably.