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Impact of Best Corrected Final Visual Acuity on the Performance of Intraocular Lens Power Calculations
Journal article   Open access   Peer reviewed

Impact of Best Corrected Final Visual Acuity on the Performance of Intraocular Lens Power Calculations

H. John Shammas, Maya C. Shammas, Cooper Bahr, Ramie Sahota and Brad Hall
Clinical ophthalmology (Auckland, N.Z.), v 19(Issue 1), pp 1693-1697
01 Jan 2025
DOI: https://doi.org/10.2147/OPTH.S520815
PMID: 40421355
url
https://doi.org/10.2147/OPTH.S520815View
Published, Version of Record (VoR) Open

Abstract

Barrett Universal II formula intraocular lens power calculations post-operative visual acuity
Purpose: To evaluate the impact of the best-corrected final visual acuity (BCFVA) on the accuracy of intraocular lens (IOL) power calculations. Design, Setting and Methods: This is a retrospective observational study in a private practice setting, Lynwood, California, USA. We analyzed 1107 eyes undergoing standard monofocal cataract surgery, with IOL power calculated using the Barrett Universal II formula. We evaluated the Mean Prediction Error (MPE) and its standard deviation (SD), the Mean Absolute Error (MAE) and its SD and the percentage of eyes within ± 0.50D and ± 1.00D in relation to BCFVA. Results: We analyzed 4 groups with BCFVA noted in LogMAR of ≤ 0.00, 0.02– 0.10, 0.12– 0.20 and 0.22– 0.30. MPE was − 0.030± 0.321, − 0.018± 0.353, 0.015± 0.369 and 0.070± 0.421 D, respectively. MAE was 0.263± 0.186, 0.282± 0.213, 0.301± 0.214 and 0.354± 0.236 D, respectively. The percentage of eyes within ± 0.50D was 85.9%, 82.6%, 81.5% and 75.5%, respectively. A subgroup analysis of the 1005 eyes with BCFVA of 0.20 LogMAR or better resulted in an MPE of − 0.007± 0.354 D, a MAE of 0.285± 0.209 D and a percentage of eyes within ± 0.50D of 82.8%. The difference between this subgroup and the group of eyes with a BCFVA 0.22– 0.30 was statistically significant (p< 0.001). Conclusion: Better IOL power predictions were noted by limiting the study to eyes with BCFVA of 0.20 LogMAR or better.

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