Posters

Optical performance of a new trifocal intraocular lens with a fractal diffractive profile

Poster Details

First Author: W.Furlan SPAIN

Co Author(s): D. Montagud Martínez   V. Ferrando   S. García Delpech   J. Monsoriu           

Abstract Details

Purpose:

To evaluate the optical quality of a new trifocal intraocular diffractive lens based on the fractal devil’s staircase function, using an optical design program and a commercial visual adaptive optics simulator.

Setting:

Diffractive Optics Group (Universidad de Politécnica de Valencia-Universidad de Valencia), Valencia, Spain.

Methods:

In the numerical simulation, the Zemax Optic Studio optical design software was employed to construct a Liou-Brennan model eye in which the crystalline lens was replaced by an intraocular lens of 22 D base power. The new IOL was tested comparatively with a standard trifocal lens for 3.0 mm and 4.5 mm pupil diameters. The through the focus area under the MTFs (AMTFs) were calculated. Additionally, both trifocal profiles were simulated in a commercial adaptive optics device (VAO, Voptica SL, Murcia, Spain) and the images provided by the instrument at different vergences were registered with a high-resolution camera.

Results:

The through-focus AMTFs of the new trifocal lens showed a peak in the intermediate range that was higher than the standard trifocal lens at both pupil diameters. The new lens also provides a better near focus with 3.0 mm pupil diameter, and a better distance focus for 4.5 mm pupil. The optotype images provided by the visual simulator agree with the simulations.

Conclusions:

There was a difference in the degree of near, intermediate, and distance quality of the image with the two types of multifocal IOLs. Intermediate vision was more prominent with the new trifocal IOL.

Financial Disclosure:

None