The most fundamental aspect of a contact lens is its optics; the manner in which the
refraction of light is managed to optimise vision to the clinical benefit of the lens wearer. This …

We present a first implementation of an optical encryption setup in the fractional Fourier
domain using an electrically focus-tunable lens. Fractional Fourier transform cryptosystems …

Background Presbyopia has become a global disease affecting the world's aging
population. Among various treatments, cataract extraction and intraocular lens (IOL) …

Multifocal lenses comprising progressive power surfaces are commonly used in contact and
intraocular lens designs. Given a visual performance metric, a wavefront engineering …

We propose, implement, and validate a new objective method for predicting the trends of
visual acuity through-focus curves provided by specific optical elements. The proposed …

We compared different power distributions to design freeform progressive addition lenses
(PALs) based on a minimization error function model. We employed straight line …