New Intraocular Lens That Modifies The Wavefront To Obtain Continuous Far-Near Vision: Optical Bench Performance And Clinical Results.
Published 2022 - 40th Congress of the ESCRS
Reference: PP01.16 | Type: Free paper | DOI: 10.82333/dh1m-es18
Authors: Belén Alfonso-Bartolozzi* 1 , Luis Fernandez-Vega-Cueto 1 , Carlos Lisa 1 , Ignacio Rodriguez-Uña 2 , David Madrid-Costa 3 , José F. Alfonso 4
1Cornea & Lens,Fernandez-Vega Universitary Institute,OVIEDO,Spain, 2Glaucoma,Instituto Universitario Fernández-Vega,Oviedo,Spain, 3Optometry and Vision Department. Optics and Optometry Faculty.,Complutense Univerisity of Madrid,Madrid,Spain, 4Cornea & Lens,Fernandez-Vega Universitary Institute,Oviedo,Spain
Purpose
Assess the performance in the optical bench and the visual results in the clinic of a new multifocal intraocular lens with optics based on wavefront technology.
Setting
Fernández-Vega Universitary Institute (Oviedo), España.
Methods
The AcrySof Vivity lens improves patients' near vision, thanks to a new optical design (non-diffractive and non-refractive), which obtain a depth of focus of +1.75D. The study in an optical bench was performed on a +20D lens, according to the ISO eye model; image quality was assessed according to the modulation transfer function (MTF). The clinical study includes a sample of 50 patients (100 eyes) who underwent cataract surgery using femtosecond laser-assisted phacoemulsification. The inclusion criteria were: age between 60 and 90 years and axial length between 22.0 and 25.0 mm. Visual acuity, defocus curve, contrast sensitivity, and vision quality were analyzed using questionnaires. The mean age of the patients was 75.1±7.0 years.
Results
In the optical bench, the area under the MTF shows a transition between two differentiated foci, located between 0.00 and 2.00 diopters, considering an aperture diaphragm between 4.5 and 3.0 mm. In the clinical study, in the postoperative period at 6 months, the mean distance corrected visual acuity (DCVA) was 0.93±0.11 (Snellen scale). Mean binocular DCVA at 66- 50- and 40-cm (defocus curve) was 0.7, 0.6, and 0.5, respectively. The contrast sensitivity (Optec-6500) were within normal limits. In the vision quality questionnaire (Catquest-9SF), 100% of the patients reported being quite satisfied or very satisfied with their vision. Regarding the presence of dysphotopsia (McAlinden), 12% of the patients reported having only mild starburst.
Conclusions
On an optical bench, the MTF-area curve of AcrySof Vivity shows a very characteristic profile, with a smooth transition between two differentiated far-near foci. In clinical practice, if the appropriate patient profile is selected, the visual benefits obtained at far and near are superior to those of lenses classified as EDoF (extended depth of focus), and, furthermore, without present significant dysphotopsia.