To compare the measurement results of 3 ocular biometry devices, A-scan ultrasound and two types of partial coherence interferometers in normal and cataractous eyes.

This study included 42 normal eyes and 40 cataractous eye. Axial length and anterior chamber were measured using three ocular biometry measurements, ultrasonography (HiScan®, Optikon 2000, Rome, Italy), IOL Master® (Carl Zeiss, Jena, Germany), and AL-scan® (Nidek, Gamagori, Japan), and mean corneal curvature and corneal diameter were measured using two partial coherence interferometers. The results were compared in each group.

Significant differences in measurements existed among the 3 ocular biometry devices (A-scan ultrasound, IOL Master® and AL-scan®) in normal eyes (p < 0.001) and cataractous eyes (p = 0.034). However, the measurements were not significantly different between the 2 partial coherence interferometers (IOL Master® and AL-scan®) in both groups. We confirmed lower agreement among the 3 ocular biometry devices in cataractous eyes compared with normal eyes in terms of a larger range of 95% agreement and error in cataractous eyes.

Significant differences in measurements were observed when using the 3 ocular biometry devices in both normal and cataractous eyes. Because of low agreements between ocular biometry devices in cataractous eyes, complementing the measurements between ocular biometry devices is necessary when measuring cataractous eyes.