ESCRS - FP12.08 - Chromatic Aberration In A High Abbe Number Iol With Different Optical Designs: An Optical Bench Study

Chromatic Aberration In A High Abbe Number Iol With Different Optical Designs: An Optical Bench Study

Published 2023 - 41st Congress of the ESCRS

Reference: FP12.08 | Type: Free paper | DOI: 10.82333/nzmm-ax48

Authors: Alejandro Cerviño* 1 , Jose Juan Esteve-Taboada 1 , Ana Hervás-Ontiveros 2

1Optics & Optometry & Vision Sciences,University of Valencia,Valencia,Spain, 2Ophthalmology,Hospital Universitario La Fé,Valencia,Spain

Purpose

To measure the MTF for different wavelengths and the effect of chromatic aberration in three optical designs of IOLs with the same, high Abbe number, lens material.

Setting

Universidad de Valencia, Valencia, Spain

Methods

A set of measurements of MTF, through-focus MTF, and Strehl ratio has been performed following the guidelines recommended in the ISO 11979-2:2014 standard, for three different wavelengths (Blue: peak at 480 nm, Green: peak at 550 nm, Red: peak at 650 nm) and a human-like aberrated cornea model, for the following non-toric IOLs: AsqelioTM Monofocal clear QLIO130C (20.5D), AsqelioTM Trifocal clear TFLIO130C (20.0D), and AsqelioTM EDOF Toric clear ETLIO130C (18.0D and 0.0D Cyl), manufactured by AST Products, Inc. (Massachusetts, U.S.A.) and made of the same hydrophobic (<0.5% water content), glistening-free material with an Abbe number of 50.

Results

MTF was slightly better for red than blue or green, with Strehl ratios of 0.86, 0.73 and 0.80, respectively, in the monofocal design. MTF through-focus in the trifocal design for 50 and 100 cy/mm was greater for distance for the red wavelength and more balanced between peaks for blue. The EDOF design showed more balanced MTFs for the different distances and different wavelengths compared to trifocal design IOL. Chromatic aberration for intermediate and near vergences was lower in the trifocal design than the EDOF design.

Conclusions

The effect of chromatic aberration on the MTF is different for different IOL designs with the same material. Chromatic aberration decreases for near vergences in the trifocal and EDOF designs compared to distance, being the decrease more pronounced in the trifocal design, thus benefiting the visual performance.