Differentiating Trifocal Technologies Through Glare Assessment
Published 2024 - 42nd Congress of the ESCRS
Reference: FP25.08 | Type: Free paper | DOI: 10.82333/rnpb-jt83
Authors: Grzegorz Labuz* 1 , Weijia Yan 1 , Thomas van den Berg 2 , Tadas Naujokaitis 1 , Ramin Khoramnia 1 , Tamer Tandogan 3 , Gerd Auffarth 1
1Department of Ophthalmology,David J. Apple Center for Vision Research,Heidelberg,Germany, 2Netherlands Institute for Neuroscience,Royal Netherlands Academy of Arts and Sciences,Amsterdam,Netherlands, 3Augenklinik Pallas,Olten,Switzerland;Department of Ophthalmology,David J. Apple Center for Vision Research,Heidelberg,Germany
Purpose
Diffractive optics have often been associated with glare issues arising from simultaneous projections, but the role of diffractive profiles remains unclear. This study objectively quantified glare in intraocular lenses (IOLs) based on diffractive principles and identified models prone to inducing this phenomenon.
Setting
David J. Apple Center for Vision Research, Department of Ophthalmology, University of Heidelberg, Germany.
Methods
Glare was assessed by means of straylight parameter with a standard C-Quant (Oculus GmbH) intended for 7°. In addition, two C-Quant modifications were used to test lower angles (i.e., 2.5° and 3.5°). The following IOL models were assessed: PanOptix (Alcon Inc.) and AT Lisa Tri (Zeiss Meditec), Synergy (J&J Vision) and Triumf (PhysIOL). The latter two aim for chromatic-aberration correction at distance. Straylight from trifocals was compared against a monofocal W-60R lens (Santen). The C-Quant test was performed through the studied IOLs via additional optical components attached to its ocular.
Results
Straylight (deg2sr-1) of the control was negligible (<1) at all tested angles, with the trifocal models showing comparable straylight at 7°. For comparison, a clear crystalline lens induces 2.5, and a 70-year-old lens 11.2 of straylight. At 3.5°, Triumf’s straylight increased to 15.5 ±0.6, followed by Synergy (6.2 ±1.1), PanOptix (4.1 ±0.3), and the AT Lisa Tri (2.0 ±0.8). The chromatic-aberration correcting models demonstrated correspondingly high straylight (Synergy: 18.8 ±1.3; Triumf: 17.3 ±0.5) at 2.5° compared to PanOptix (4.3 ±0.4), AT Lisa Tri (2.1 ±0.1) and monofocal IOLs yielding minimal or no increase.
Conclusions
Trifocal IOLs induced increased straylight, but it was limited to lower angles, which may cause difficulties detecting these effects using a standard clinical approach. The latest IOL designs featuring chromatic aberration correction at far-focus appear more susceptible than the established trifocals to inducing glare phenomena.