ESCRS - PP22.04 - Accuracy Of Intra Ocular Lens Calculation Formulae In Patients With Pseudoexfoliation Syndrome

Accuracy Of Intra Ocular Lens Calculation Formulae In Patients With Pseudoexfoliation Syndrome

Published 2022 - 40th Congress of the ESCRS

Reference: PP22.04 | Type: Free paper | DOI: 10.82333/pdk3-2p84

Authors: Inbal Gazit 1 , Anna Gershevich 1 , Adi Einan-Lifshitz 1 , Eran Pras 1 , Graham D Barrett 2 , Lior Or* 1

1Shamir medical center,Zeriffin,Israel, 2Centre for Ophthalmology and Visual Science, University of Western Australia,wa,Australia

Purpose

The purpose of this study was to investigate the visual and refractive outcomes in patients with pseudoexfoliation (PXF) undergoing routine cataract surgery and to compare the accuracy of intra ocular lens (IOL) power calculation formulae.

Setting

Shamir medical Center, Israel.

Methods

Retrospective case-series study.

Postoperative visual acuity and manifest refraction were examined. The error in predicted refraction and IOL power calculation accuracy within a range of 0.50 to 1.00 diopters (D) were compared between different IOL calculating formulae.

Results

151 eyes of 151 patients (58% females) ages 73.9±7.1 years were included in this study- 58 eyes in the PXF group and 93 eyes in the control group.

The mean absolute error (MAE) for the BUII formula was 0.63D±0.87 for the PXF group and 0.36D±0.48 for the control group. There were significant differences within individual formulae between PXF group and control group measures (p<0.05). The highest proportions of eyes with absolute error (AE) of 0.50 D or less, 0.75 D or less, and 1.00 D or less occurred using the BUII formula (PXF group: 63.79%, 74.13%, and 82.75%, respectively.  Control group: 79.57%, 93.54%, and 94.62%, respectively).

Conclusions

There were significant differences in accuracy of IOL power calculations in all formulae between PXF group and control group measures. The Barret universal II formula was the most accurate for both PXF eyes and controls.