Accuracy Of Modern Intraocular Lens Power Calculation Formulas Available Online
Published 2025 - 43rd Congress of the ESCRS
Reference: PO452 | Type: Free paper | DOI: 10.82333/nf2t-1t41
Authors: Paolo Cecchini* 1 , Gianluca Turco 2 , Rosa Giglio 3 , Omar Al Ibrahim 1 , Alessio Fregapane 1 , Daniele Tognetto 3
1Clinica Baviera Italy,Milano,Italy, 2University of Trieste,Trieste,Italy, 3Department of Medical, Surgical Sciences and Health, University of Trieste,University Eye Clinic,Trieste,Italy
Purpose
To compare the accuracy of modern intraocular lens (IOL) power calculation formulas in predicting refractive outcomes after standard cataract surgery using online available formulas.
Setting
University Hospital of Maracaibo - Ophthalmology Department - Maracaibo, Venezuela
Methods
The medical records of 400 eyes from 400 patients that received phacoemulsification and IOL implantation were retrospectively reviewed and the data was introduced on the online iol calculators. Partial coherence interferometry and corneal tomography was used to obtain the biometric values. The refractive outcomes of Barrett Universal II (BUII), Emmetropia Verifying Optical (EVO) 2.0, Hill-RBF 3.0, Super Ladas formula, Kane, and PEARL-DGS formulas were evaluated. Axial length (AL) subgroup analysis was done separately. The correlations between the prediction error calculated by each formula and AL and corneal power were also analyzed.
Results
Overall, there was no significant difference between the absolute prediction errors after adjusting the mean prediction error (p = 0.058). AL subgroup analysis of absolute error also showed that there is no significant difference between the formulas. The BUII and Hill-RBF 3.0 formulas showed a higher percentage of eyes with prediction error within ±0.50 diopters compared to the Super Ladas formula (p = 0.032 and p = 0.024, respectively). The BUII formula showed the highest IOL Formula Performance Index and therefore the highest accuracy, followed by PEARL-DGS, EVO 2.0, Kane, Hill-RBF 3.0, and Super Ladas formulas. Out of the six formulas, the prediction error calculated by Kane formula was significantly correlated with the AL (p = 0.09).
Conclusions
Analysis of the prediction error showed that the six modern IOL power calculation formulas have comparable accuracy overall and across different ranges of AL.