Spiral Optics - A New Multifocal Lens Design
Published 2025 - 43rd Congress of the ESCRS
Reference: PP19.12 | Type: Free paper | DOI: 10.82333/dfp7-a649
Authors: Ossi Kaijanen* 1 , Joonas Wirkkala 2
1Oulu Eye Surgery Ltd, Silmien Klinikka,Oulu,Finland, 2Ophthalmology,University of Oulu,Oulu,Finland
Purpose
The company Rayner is introducing a new multifocal lens concept that contains "spiral optics", which is intended to enable continuous visual acuity from distance to near. Side effects such as the perception of halos should be minimized. The aim of this study is to compare this new lens model with other multifocal lens concepts.
Setting
Medical University of Vienna, Department of Ophthalmology and Optometry
Methods
The through focus response and the through focus MTF (modulation transfer function) for 25, 50 and 100 lp/mm were determined on an optical bench. A cornea with a spherical aberration of -0.2 µm and a pupil aperture of 3.0 mm and 4.5 mm was used. The following lenses were examined at best centration: RayOne Galaxy (Rayner), AT LISA tri (Zeiss), Precizon Presbyopic NVA Model 570/A1 (Ophtec), TECNIS Synergy (J&J), Vivinex Gemetric (Hoya) and monofocal Primus-HD (OphthalmoPro), which has a spherical aberration correction of -2.0 µm. All the lenses mentioned had a refractive power of 20 D.
Results
The RayOne Galaxy showed a very wide light distribution between distance and near at a pupil opening of 3 mm. With a pupil opening of 4.5 mm, it is a strong distance bifocal lens. The AT LISA tri has a comparable trifocal light distribution to the TECNIS Synergy. The Vivinex Gemetric showed a trifocal light distribution with emphasis on the distant focal point, while the Primus-HD showed a high and narrow light distribution in a single focal point.
Conclusions
The RayOne Galaxy is an interesting option in the segment of IOLs that offer an extended depth of field.