Abstract
This work presents the first models of light sword intraocular lenses (LS IOLs) with angularly modulated optical power. We performed an experimental, comparative study with multifocal and extended depth of focus intraocular lenses, which are available on the market. The measurements conducted in an original optical bench were utilised for an analysis of point spread functions, elongated foci, modulation transfer functions and the areas defined by them. The LS IOL models perform homogeneous imaging in the whole range of designed defocus. The proposed concept of extended depth of focus seems to be promising for the development of presbyopia-correcting intraocular lenses capable of regaining fully functional vision.
Highlights
The implanted intraocular lens (IOL) has a significant effect on vision after cataract surgery
We propose a brand-new design of an extended depth of focus (EDOF) IOL profile, based on the concept of the Light Sword Lens (LSL) with an angular modulation of the optical power
This paper presents the first in vitro characterisation of Light Sword Intraocular Lens (LS IOL) models with the angular modulation of optical power, based on the LSL concept
Summary
The implanted intraocular lens (IOL) has a significant effect on vision after cataract surgery. In contrast to bifocal or trifocal IOLs, EDOF lenses work by focusing light roughly into a stretched light segment, instead of two or three discrete points. The aim of this elongated focus is to improve intermediate and near vision, and to reduce the halo effect. Another solution, offering wider EDOF, are stenopeic IOLs, but a small diameter of their aperture causes low contrast sensitivity [5]. According to the recently performed clinical assessment, visual acuity achieved with the LSL correction in a presbyopic eye is comparable to stenopeic, but exhibits no significant loss in contrast sensitivity [11]
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