Prediction accuracy of standard and total keratometry by swept-source optical biometer for multifocal intraocular lens power calculation.

ABSTRACT: We aimed to compare the refractive outcomes of cataract surgery with diffractive multifocal intraocular lenses (IOLs) using standard keratometry (K) and total keratometry (TK). In this retrospective observational case series study, a total of 302 patients who underwent cataract surgery with multifocal IOL implantation were included. Predicted refractive outcomes were calculated based on the current standard formulas and a new formula developed for TK using K and TK, which were obtained from a swept-source optical biometer. At 2-month postoperatively, median absolute prediction errors (MedAEs) and proportion of eyes within?±?0.50 diopters (D) of predicted postoperative spherical equivalent (SE) refraction were analyzed. There was no significant difference between MedAEs or proportion of eyes within?±?0.50D of predicted refraction from K and TK in each formula. In TFNT00 and 839MP IOL cases, there was no difference between MedAEs from K and TK using any formula. In 829MP IOL cases, MedAE from TK was significantly larger than that from K in Barrett Universal II/Barrett TK Universal II (P?=?0.033). In 677MY IOL cases, MedAE from TK was significantly larger than that from K in Haigis (P?=?0.020) and Holladay 2 (P?=?0.006) formulas. In the subgroup analysis for IOL, there was no difference between the proportion of eyes within?±?0.50 D of predicted refraction from K and TK using any formula. TFNT00 and 839MP IOLs were favorable with TK, with 677MY IOL with K and 829MP IOL being in a neutral position, which necessitates the study that investigates the accuracy of the new TK technology.

SUBMITTER: Lee H 

PROVIDER: S-EPMC7910298 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature