Posters

How to fully use diffractive technology for intraocular correction of presbyopia?

Poster Details

First Author: F.Castignoles FRANCE

Co Author(s):    E. Philipakki   P. Sourdille                 

Abstract Details

Purpose:

To demonstrate the energy gain of new diffractive technology IOLs with respect to state of the art

Setting:

R&D department, Cristalens Industrie, Lannion, France

Methods:

Four diffractive IOLs were under study: one conventional bifocal with +3D addition (simulating the ARTIS PL M, Cristalens Industrie, France), one trifocal IOL with +1.75D/3.5D additions (simulating FineVision IOL (Physiol, Belgium)), two complementary IOLs with patented new diffractive profiles (simulating ARTIS ACTIVE MID and PLUS IOLs (Cristalens Industrie, France) with patent pending diffractive profiles). Through-focus modulation transfer functions (TF-MTF), through-focus Strehl ratios computed in the spatial domain SRX and through-focus visual Strehl ratios computed in the spatial domain VSOTF were simulated using an artificial eye in Zemax Opticstudio 18.4.1 software (Zemax LCC, Kirkland, Washington, USA).

Results:

Bifocal IOL had 2 sharp peaks, trifocal IOL 3 sharp peaks in the TF-MTF, while MID and PLUS IOLs had one sharp peak for distance vision and a broader peak, respectively in the intermediate and near range. TF-SRX and TF-VSOTF were higher in the intermediate range (0.9D to 2.0D) for the MID and for the near range (1.9D to 3.0D) for the PLUS IOL. The trifocal IOL presented a gap of Strehl ratio from 1.3 to 2.1 D (corneal plane). Halo intensity and spatial distribution were comparable in the 3 advanced optics IOLs and larger halos for bifocal IOL.

Conclusions:

Multifocality implicates light distribution between foci with 50% dedicated for distance vision. The overlapping of the complementary profiles of MID and PLUS IOLs should enable to cover the gap of sharpness in the intermediate range and provide continuous sharp vision at any arm’s length.

Financial Disclosure:

... is employed by a for-profit company with an interest in the subject of the presentation, ... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented