Posters

Optical-bench ray visualisation and the image quality of the mono-EDOF and the Symfony

Poster Details

First Author: G.Labuz GERMANY

Co Author(s):    H. Son   R. Khoramnia   G. Auffarth              

Abstract Details

Purpose:

The Mono-EDoF ME4 (Santen), a recently introduced intraocular lens (IOL) with an extended depth of focus (EDoF), aims to provide the excellent distance vision that one expects of monofocal lenses but with a more extensive visual range. Ray propagation was visualized on the optical bench in the new lens and the Symfony ZXR00 (J&J Vision). We assessed their optical quality by measuring through focus (TF) and modulation transfer function (MTF).

Setting:

David J. Apple International Laboratory for Ocular Pathology, Department of Ophthalmology, University of Heidelberg, Germany.

Methods:

We used an optical-metrology instrument to measure the TF MTF under (green) monochromatic and polychromatic conditions at a spatial frequency of 25, 50 and 100 lp/mm, which correspond to visual acuity of 20/80, 20/40 and 20/20, respectively. In the ray-visualization setup, 532-nm light was projected through a model cornea and the IOL submerged in a fluorescein solution. Light propagation was captured with a camera mounted on a surgical microscope. Ray visualization was also performed on a monofocal lens (W-60R, Santen).

Results:

At 25 lp/mm, the Mono-EDoF outperformed the Symfony at the primary (far) focus, but at 50 and 100 lp/mm the two EDoF differed minimally for the two light conditions. The Mono-EDoF showed more extended focus area than the Symfony for lower defocus. However, at 1.3D, the TF MTF of the Mono-EDoF became worse than that of the Symfony, which produced the secondary peak at 1.72D. MTF performance at primary-point of both models degraded in polychromatic light compared with green-light. Ray visualization demonstrated an extended focus area of the Mono-EDoF in contrast with two distinct foci of the Symfony.

Conclusions:

The Mono-EDoF showed a good image quality and an increased range of vision from far to intermediate. Although the lens provided better TF MTF performance than the Symfony up to (approx.) 1.3D, the reverse relation was observed for higher defocus levels. The ray visualization of the Mono-EDoF confirmed an enhanced range of vision that cannot be achieved by a standard monofocal lens.

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