Investigating the chromatic properties of multifocal intraocular lenses

Session Details

Session Title: Pseudophakic IOLs: Multifocal II

Session Date/Time: Sunday 08/10/2017 | 10:30-12:30

Paper Time: 11:22

Venue: Room 2.1

First Author: : D.Gatinel FRANCE

Co Author(s): :    J. Loicq   N. Willet                 

Abstract Details

Purpose:

To study the respective contributions of Intraocular lenses (IOLs) biomaterial (Abbe #) and diffractive pattern topography on the longitudinal chromatic aberration (LCA) of various types of multifocal IOLs.

Setting:

Rothschild Foundation, CEROC, Liege Space Center Department of Chemistry, University of Liege

Methods:

The LCAs associated with the different focal points of diffractive hydrophobic – made of aromatic and/or aliphatic materials – and hydrophilic multifocal IOLs were experimentally determined on an optical bench in Red Green Blue (RGB) conditions (650, 546 and 480 nm). The effects of Abbe number and of the topography of the different diffractive profiles were evaluated. Based on wavelength–dependent Modulation Transfer Function (MTF) through-focus curves, the polychromatic behavior of multifocal IOLs was assessed.

Results:

LCA amplitudes and signs were different for each of the focal points. While far vision LCA was of negative sign and appeared to be controlled by the material Abbe number, the diffractive LCA for near and intermediate visions was independent of IOL material. The diffractive pattern characteristics, which control the closer distance powers, prove to be pivotal in fine-tuning the LCA related to these near and intermediate foci.

Conclusions:

Diffractive multifocal IOLs show chromatic aberrations which are controlled by the biomaterial Abbe number for its refractive component, and by the characteristics of the diffractive pattern for the dffractive component.

Financial Disclosure:

receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, receives consulting fees, retainer, or contract payments from a competing company