Light Scattering Comparison Between Toric And Non-Toric Trifocal And Monofocal Intraocular Lenses
Published 2026 - 44th Congress of the ESCRS
Reference: FP32.10 | Type: Free paper | DOI: 10.82333/0zgw-7628
Authors: Ramin Khoramnia* 1 , Agnieszka Zielińska 2 , Kyungmin Koh 3 , Gerd U. Auffarth 4 , Grzegorz Łabuz 4
1Department of Ophthalmology, Faculty of Medicine and University Hospital Carl Gustav Carus, TU Dresden,Dresden,Germany;The David J. Apple Center for Vision Research, Department of Ophthalmology, University of Heidelberg,Heidelberg,Germany, 2The David J. Apple Center for Vision Research, Department of Ophthalmology, University of Heidelberg,Heidelberg,Germany;Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Torun,Torun,Poland, 3The David J. Apple Center for Vision Research, Department of Ophthalmology, University of Heidelberg,Heidelberg,Germany;Department of Ophthalmology, Kim's Eye Hospital, Konyang University College of Medicine,Seoul,Korea, Republic Of, 4The David J. Apple Center for Vision Research, Department of Ophthalmology, University of Heidelberg,Heidelberg,Germany
Purpose
Trifocal intraocular lenses (IOLs) enhance postoperative spectacle independence but may induce photic phenomena due to diffractive light splitting. This study objectively quantified light scattering of the Hoya Vivinex Gemetric and Gemetric Plus trifocal toric and non-toric IOLs compared with a monofocal Vivinex XY1 control, assessing the influence of toric correction and optical power.
Setting
The David J. Apple Center for Vision Research, Department of Ophthalmology, University of Heidelberg, Heidelberg, Germany
Methods
Thirty-six IOLs (+10 D, +20 D, +30 D; toric and non-toric) were examined in vitro using a modified C-Quant straylight meter at scattering angles of 7°, 3.5°, and 2.5°.
Results
Both trifocal models demonstrated low straylight values across all angular ranges, with no statistically significant differences compared to monofocal controls (p>0.05). Toric versus non-toric designs and power variations showed no effect on light scattering, except for a minor, clinically negligible difference between +10D and +20D lenses at 7°. Median straylight values for Gemetric and Gemetric Plus IOLs (0.9–1.4 deg²sr⁻¹) were comparable to monofocal optics and markedly lower than reported for other commercial trifocal designs.
Conclusions
These results indicate that Gemetric and Gemetric Plus IOLs produce minimal light scattering and negligible glare potential. Their diffractive architecture, featuring a compact 3.2-mm central zone, may contribute to reduced photic phenomena and favorable visual quality, supporting their clinical suitability as low-scatter trifocal IOL options.