Abstract
PurposeTo investigate the accuracy of a new optical biometer for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery.MethodsConsecutive eyes of patients undergoing cataract surgery with the same IOL model were enrolled in a prospective cohort study.Axial length (AL) and corneal power were measured with an optical biometer based on optical low-coherence interferometry and Placido-disc corneal topography. IOL power was calculated with the Hoffer Q, Holladay 1 and SRK/T formulas. For each formula the lens constant was optimized in retrospect in order to achieve a mean prediction error (PE) of zero (difference between the predicted and the postoperative refraction). Median absolute error (MedAE) and percentage of eyes with PE ±0.50 D were calculated.ResultsSeventy-four eyes of 74 cataract patients were enrolled. The MedAE was 0.25 D with all formulas. A PE within ±0.50 D was obtained in 89.04% of cases with the Hoffer Q and SRK/T formulas, and in 87.67% of cases with the Holladay 1 formula.ConclusionsThe optical biometer investigated in the present study provides accurate measurements for IOL power calculation.
Highlights
Intraocular lens (IOL) power calculation has gained great interest in the era of refractive cataract surgery
The optical biometer investigated in the present study provides accurate measurements for IOL power calculation
IOL power calculation based on axial length (AL) measured by immersion US biometry and K measured by Placido-disc corneal topography provided results that were close to those obtained with the Aladdin biometer (Table 2)
Summary
Intraocular lens (IOL) power calculation has gained great interest in the era of refractive cataract surgery. IOL power was calculated with the Hoffer Q, Holladay 1 and SRK/T formulas. The optical biometer investigated in the present study provides accurate measurements for IOL power calculation.
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