A new trifocal corneal inlay for presbyopia

TL;DR

This paper introduces a novel trifocal corneal inlay designed to improve vision at all distances for presbyopic patients, demonstrating superior performance over existing designs through optical simulations and experimental validation.

Contribution

The paper presents the first trifocal corneal inlay design, enhancing vision at far, intermediate, and near distances, with customizable parameters for personalized treatment.

Findings

Demonstrated superior optical performance compared to existing CIs

Validated image forming capabilities using adaptive optics simulation

Introduced customizable parameters for personalized inlay design

Abstract

Corneal inlays (CIs) are the most recent surgical procedure for the treatment of presbyopia in patients who want complete independence from the use of glasses or contact lenses. Although refractive surgery in presbyopic patients is mostly performed in combination with cataract surgery, when the implantation of an intraocular lens is not necessary, the option of CIs has the advantage of being minimally invasive. Current designs of CIs are, either: small aperture devices, or refractive devices, however, both methods do not have good performance simultaneously at intermediate and near distances in eyes that are unable to accommodate. In the present study, we propose the first design of a trifocal CI, allowing good vision, at the same time, at far, intermediate and near vision in presbyopic eyes. We first demonstrate the good performance of the new inlay in comparison with a commercially available CI by using optical design software. We next confirm experimentally the image forming capabilities of our proposal employing an adaptive optics based optical simulator. This new design also has a number of parameters that can be varied to make personalized trifocal CI, opening up a new avenue for the treatment of presbyopia.