A new metric for quantifying the optical quality of multifocal intraocular lenses by means of axial modulation transfer function

Session Details

Session Title: Presented Poster Session: Pseudophakic IOLs

Session Date/Time: Tuesday 08/09/2015 | 09:30-11:00

Paper Time: 09:40

Venue: Poster Village: Pod 3

First Author: : E.Papadatou SPAIN

Co Author(s): :    A. Del Aguila-Carrasco   J. Esteve-Taboada   D. Madrid-Costa   R. Montes-Mico     

Abstract Details

Purpose:

To evaluate and quantify the optical quality of multifocal intraocular lenses (MIOLs) using a new metric that is based on volume calculation under the axial modulation transfer function (MTF).

Setting:

University of Valencia, Spain

Methods:

MTF data from multifocal intraocular lenses were used in order to assess their optical quality with the new metric. The data collection was performed using the PMTF device (Lambda-X, Nivelles, Belgium) which complies with ISO standards for intraocular lenses measurements. The lenses were measured at the well-centered position for a 3.0 mm aperture size.

Results:

The representation of the MTF at various spatial frequencies and at different focal planes led to the creation of a surface that gave information for the MTF and the Through Focus MTF (TF-MTF) configuration at the same time (axial MTF). Setting different defocus intervals we calculated the volume under the created surface for the main foci of the lenses at a range of spatial frequencies. Intervals of 0.25 D, 0.50 D, 0.75 D and 1.0 D were used. The broader the interval range and the higher the cut-off frequency, the higher the value of the volume.

Conclusions:

The metric calculated the volume under the surface created by the axial MTF. This way, the optical performance of different MIOLs can be evaluated at different focal points and spatial frequencies. Thus, our metric can provide valuable information about the optical tolerance to defocus and the optical quality at different vergences. Furthermore, the new induced metric can be generalized to determine the optical quality of any optical system by means of axial MTF.

Financial Interest:

NONE