Comparison of Ocular Biometry Agreement and Prediction Error in Eyes with Cataracts

Purpose: To compare ocular biometry measurements obtained using optical low-coherence reflectometry (OLCR), swept-source optical coherence tomography (SS-OCT), and A-scan devices in eyes with cataracts and to evaluate prediction error based on the difference between the predicted refraction and the postoperative spherical equivalent.Methods: This study included 40 eyes from 31 patients who underwent cataract surgery. Keratometry, axial length, and anterior chamber depth were measured using the HBM-1^®, IOL Master 700^®, PacScan 300A^®, and KR-1^® autokeratorefractometer. Intraocular lens (IOL) power was calculated using the Barrett Universal II formula. Mean absolute prediction error, defined as the absolute difference between the predicted refraction and the postoperative spherical equivalent measured using an autorefractor 4 ± 2 weeks after cataract surgery, was compared between the HBM-1^® and IOL Master 700^®.Results: Mean keratometry differed significantly among the HBM-1®, IOL Master 700^®, and KR-1^® autokeratorefractometer (<i>p</i> < 0.01). Mean axial length did not differ significantly among the HBM-1^®, IOL Master 700^®, and PacScan 300A^® (<i>p</i> = 0.29). Mean anterior chamber depth differed significantly among the HBM-1^®, IOL Master 700^®, and PacScan 300A^® (<i>p</i> < 0.01). Mean absolute prediction error did not differ significantly between the HBM-1^® and IOL Master 700^® (<i>p</i> = 0.756).Conclusions: Keratometry and anterior chamber depth differed significantly among the devices, whereas axial length and mean absolute prediction error did not differ significantly. Differences in corneal curvature measurements among devices should be considered when planning toric IOL implantation.