ESCRS TORIC IOL FORMULAE: ASTIGMATISM PREDICTION ACCURACY IN ROUTINE CATARACT SURGERY
Published 2026 - 30th ESCRS Winter Meeting
Reference: PO039 | Type: Presented Poster & Poster | DOI: 10.82333/agh2-qk42
Authors: Daniel Wallinger* 1 , Leon Pomberger 2 , Sophia Reifeltshammer 3 , Klaus Straßmair 4 , Matthias Bolz 3 , Nino Hirnschall 3
1Department of Ophthalmology,Johannes Kepler Universität ,Linz,Austria, 2Department of Ophthalmology,Kepler Universitätsklinikum ,Linz,Austria;Department of Ophthalmology,Johannes Kepler Universität,Linz,Austria, 3Department of Ophthalmology,Kepler Universitätsklinikum ,Linz,Austria;Department of Ophthalmology,Johannes Kepler Universität ,Linz,Austria, 4Department of Ophthalmology,Kepler Universitätsklinikum ,Linz,Austria
Purpose
To evaluate and compare the prediction accuracy of the toric intraocular lens (IOL) power calculator formulae integrated in the ESCRS calculator.
Setting
Single-center retrospective analysis.
Methods
Data from patients who underwent routine cataract surgery with toric IOL implantation between October 2023 to April 2025 were analyzed. Preoperative optical biometry (IOLMaster700, Carl Zeiss Meditec, Germany) data, which served as input for the ESCRS calculator, and postoperative manifest refraction was recorded for each patient. A surgically induced astigmatism (SIA) of 0.2 diopters (D) at 90° was considered. For each ESCRS toric IOL formula, predicted spherical equivalent and residual astigmatism (magnitude and axis) for the respective implanted IOL and eye were recorded. Prediction accuracy was assessed using the Eyetemis Astigmatism Analysis online tool. Mean absolute errors (MAE), centroid magnitude and axis, and the proportions of predictions within 0.25, 0.50, 0.75 and 1.00 D were analyzed. Visualization was performed using double-angle plots and convex polygons.
Results
A total of 110 right eyes (50 male, 60 female patients) were included. Mean preoperative astigmatism was 2.12 D ± 0.71 D, and mean postoperative refractive astigmatism was 0.51 D ± 0.34 D. Preliminary results showed MAEs of 0.45 D for EVO, 0.46 D for Kane, 0.48 D for Barrett, and 0.51 D for Hoffer QST. The proportion of eyes within ±50 D of predicted astigmatism was 59% for EVO, 58% for Kane, 57% for Barrett, and 54% for Hoffer QST.
Conclusion
Preliminary findings suggest that all ESCRS toric IOL formulae demonstrate high accuracy in astigmatism prediction, with the majority of eyes achieving residual astigmatism within 0.50 D. Full evaluation of statistical differences will follow completion of the dataset.