AXIAL LENS POSITION OF INVERTED MENISCUS IOL
Published 2025 - 29th ESCRS Winter Meeting
Reference: FP01.14 | Type: Free Paper | DOI: 10.82333/rzd4-dd03
Authors: Eloy Villegas* 1 , Encarna Alcón 2 , Jose María Marín 2 , Robles Consuelo 3 , Lucía Hervella 3 , Harilaos Ginis 3 , Pablo Artal 1
1University of Murcia,Murcia,Spain, 2Oftalvist,Murcia,Spain, 3Voptica,Murcia,Spain
Purpose
To measure and evaluate the in-vivo axial lens position of a new inverted meniscus intraocular lens (ArtIOLs, Voptica SL, Murcia, Spain) which improve the overall off-axis optical quality and induce different amounts of negative spherical aberration to increase depth of focus. The outcomes were compared with standard biconvex lenses and were used to evaluate the effect on retinal image magnification.
Setting
Oftalvist clinic of Murcia, Spain; University of Murcia, Spain.
Methods
55 and 62 eyes were implanted with ArtIOLs® 40 and 70 respectively, which had C-loop haptics. Biconvex IOLs were implanted in two other groups, one with C-loop haptics (19 eyes) and the other with Double C-loop haptics (20 eyes). Three months after the surgery, the aqueous depth (AQD), that refers to the distance between the corneal endothelium and the anterior surface of the IOL, was measured with the Anterion OCT system (Heidelberg Engineering, Germany) using the manual option on the line of sight. The nodal points of the eye and the image magnifications were calculated using ray-tracing software (Zemax OpticStudio).
Results
There were no significant differences between the groups with the two models of ArtIOLs®. The mean values of AQD were 4.42±0.28 and 4.40±0.28 mm for ArtIOLs® 40 and 70 respectively. In eyes with C-loop biconvex IOL, the lens position was similar, 4.35±0.19 mm (p-value>0.05). However, Double C-loop biconvex IOL was sightly closer to the cornea, mean AQD of 4.12±0.30 mm. In a model eye, the distances from the cornea to the nodal points of the eye were located at 7.36, 7.31 and 7.25 mm in ArtIOLs®, C-loop biconvex and Double C-loop biconvex IOLs groups respectively. It involved a maximum difference in the retinal image size between these types of lenses of 0.60%.
Conclusion
The anterior surface of ArtIOLs® was positioned sightly closer to retina, but the difference was not significant in comparison to biconvex IOLs with the same C-loop haptics. The nodal points were also slightly displaced toward the retina, but the effect on retinal image size was negligible.