Posters

Visual and optical performance of a new extended depth of focus intraocular lens

Poster Details

First Author: A.Zaytouny SPAIN

Co Author(s): A. Zaytouny   F. Vega   M. Sagrario Millán   G. Cardona   M. Gil Arnal        

Abstract Details

Purpose:

Several drawbacks such as reduction of contrast sensibility and halos have been reported by patients implanted with multifocal intraocular lenses (IOLs). Extended depth of focus (EDOF) IOLs have appeared with the aim of reducing some of those disadvantages associated with multifocal IOLs. The purpose of this project is to perform a complete study of the new Mini®WELL EDOF IOL both regarding its optical properties and the clinical performance (including visual disturbances) in patients implanted with this lens during cataract surgery.

Setting:

This prospective study has been conducted in the Hospital de la Santa Creu i Sant Pau of Barcelona in which the clinical data has been obtained, and the Universitat Politécnica de Catalunya (Barcelona), where the in vitro results were collected.

Methods:

In order to assess the optical design of this EDOF IOL we used quality metrics from an optical testing bench, both along the optical axis and as a function of the pupil diameter. We also examined halos around the far focus through different pupils and compared it with a bifocal and a trifocal IOL. On the other hand, as to the assessment of the visual performance it provides, we obtained the defocus curves (DC) from a group of patients implanted with the IOL through a wide range of distances. The patients were also assessed regarding the subjective perception of halos.

Results:

According to the results, the Mini®WELL EDOF IOL  demonstrate a very good level of both optical and visual performance at far and intermediate distances, and a substantial pupil diameter dependence at near distances. The correlation between the optical quality metrics and the clinical DC measured in pseudophackic patients has found to be good. Although that lens provides a continuous range of foci that improves vision at intermediate distances, visual acuity progressively decreases as the reading distance gets closer. Lastly, it has been shown that this IOL induces a reduced incidence, size and intensity of halos in comparison to multifocal.

Conclusions:

As a conclusion we claim that the data obtained from both its optical performance and visual quality demonstrate that this EDOF IOL provides good vision at distant and intermediate distances, and shows a reduced influence of photic phenomena at far distances. In addition, there is a good correspondence between the optical testing bench results and the clinical DC obtained from the recruited patients of the study.

Financial Disclosure:

None