ESCRS - PP01.02 - Diffractive Trifocal Lens Of Glistening-Free Hydrophobic Acrylic Material: Relationship Between Optical Bench Performance And Clinical Results

Diffractive Trifocal Lens Of Glistening-Free Hydrophobic Acrylic Material: Relationship Between Optical Bench Performance And Clinical Results

Published 2023 - 41st Congress of the ESCRS

Reference: PP01.02 | DOI: 10.82333/ykzv-6734

Authors: Belén Alfonso Bartolozzi* 1 , Luis Fernández-Vega-Cueto 1 , Carlos Lisa 1 , María S. Millán 2 , David Madrid-Costa 3 , José F. Alfonso 1

1Cornea & Lens Surgery,Fernandez-Vega Eye Institute,Oviedo,Spain, 2Optic & Optometry,Politechnic University of Catalonia,Tarrasa,Spain, 3Optic & Optometry,Complutense University Madrid,Madrid,Spain

Evaluate and relate the optical bench performance and the clinical performance, of a lens with diffractive trifocal optics and made of a hydrophobic material glistening-free.

Fernández-Vega Eye Institute, Oviedo, Spain

PanOptix intraocular lens (Alcon, USA) is classified as a trifocal lens with a non-apodized diffractive optical design. It has recently begun to be manufactured in hydrophobic acrylic material glistening free. The optical bench study (Polytechnic University of Catalonia) was carried out on a +20 diopters lens, following ISO (International Standards Organization) eye model. Image quality was assessed based on the modulation transfer function. The clinical study includes a sample of 50 patients (100 eyes) who underwent femtosecond laser assisted lensectomy. The inclusion criteria were: age between 55 and 75 years, and axial length between 22 and 26 mm. Distance visual acuity, defocus curve and degree of satisfaction were analyzed.

In the optical bench, the lens shows in the MTF through the foci, three well-defined foci with 4.5mm aperture diaphragm; far focus, intermediate focus at +2.20 D and near focus at +3.30 D. At 3mm aperture, the intermediate and near focus are continuous. In the clinical study, at 6 months, the mean corrected distance visual acuity (CDVA) was 0.95 ± 0.10 (Snellen scale) and 92.4% of the eyes had a spherical equivalent between ±0.50 D. The mean binocular CDVA at 66, 50, and 40 cm (defocus curve) was 0.8, 0.9, and 0.7, respectively. Contrast sensitivity (Optec-6500) was within normal limits. In the vision quality questionnaire (Catquest-9SF), 96% of the patients reported being quite satisfied or very satisfied with their vision.

In the optical bench, the MTF through the foci shows the near focus with an addition of +3.30 D and the intermediate focus of +2.20 D (4,5mm aperture). In the clinic, a defocus curve is obtained with a binocular CDVA always greater than 0.7, from the far focus to the near focus (40 cm).