Omni-focal refractive focus correction technology as a substitute for bi/multi-focal intraocular lenses, contact lenses, and spectacles

Abstract

We present novel technology for extension in depth of focus of imaging lenses for use in ophthalmic lenses correcting myopia, hyperopia with regular/irregular astigmatism and presbyopia. This technology produces continuous focus without appreciable loss of energy. It is incorporated as a coating or engraving on the surface for spectacles, contact or intraocular lenses.It was fabricated and tested in simulations and in clinical trials. From the various testing this technology seems to provide a satisfactory single-lens solution. Obtained performance is apparently better than those of existing multi/bifocal lenses and it is modular enough to provide solution to various ophthalmic applications.

Extended depth of focus imaging: a review

“…The interferometric-based solution of Refs. 22 and 23, because it is rotationinvariant, allows regular and irregular astigmatism correction because, due to the extended depth of focus, if the astigmatism is lower than the extension in the focal depth (which in this approach was limited to 3.00 diopter [61][62][63][64][65]), there always will be an axial position where the two focal points (after the extension) will coincide. This operation principle is schematically demonstrated in Fig.…”

Clinical trials of interference-based extended depth of focus intra ocular lens design

“…Various solutions tend to solve this problem by either fabricating a diffractive IOL [1][2][3] (e.g. IOLs as Restor of Alcon and Acrilisa of Zeiss) which suffers from high chromatic aberrations (those lenses lose their multi focal capability and function as almost a mono focal lenses when non green illumination is used [4]) as well as lose of resolution in the intermediate ranges. Note that the intermediate ranges are very important for working in front of a computer, watching a television etc.…”

Extended depth of focus intra-ocular lens: a solution for presbyopia and astigmatism

“…Various solutions tend to solve this problem by either fabricating a diffractive IOL [1][2][3] (e.g. IOLs as ReStore of Alcon and Acrilisa of Zeiss) which suffers from high chromatic aberrations (those lenses lose their multi focal capability and function as almost a mono focal lenses when non green illumination is used [4]) as well as lose of resolution in the intermediate ranges. Note that the intermediate ranges are very important for working in front of a computer, watching a television etc.…”