Adjustable lens technology has the potential to improve Head Mounted Displays (HMDs)
through style and comfort by providing optical prescription correction and focussing …

The metrology of freeform wavefront can be performed by the use of a noninterferometric
method, such as a Shack–Hartmann sensor (SHS). Detailed experimental investigations …

The Alvarez lenses consist of two parts with surface geometry designed to produce a
change in refractive power with transversal translation between the upper and lower parts of …

Rotationally tunable diffractive optical elements (DOEs) consist of two stacked diffractive
optical elements which are rotated with respect to each other around their central optical …

Purpose To establish the optical performance of currently available Alvarez variable‐power
spectacles in relation to their possible utility for ametropes and presbyopes. Methods Two …

This paper presents a refractive optical system consisting of two lens bodies with helical
surface structures, which allows for tuning the optical refraction power by means of a mutual …

The increased range of manufacturable freeform surfaces offered by the new fabrication
techniques is giving opportunities to incorporate them in the optical systems. However, the …

We present a systematic review of solid tunable lenses based on the Alvarez–Lohmann
principle, which mainly focuses on the optimization, miniaturization, and integration of such …

This paper presents the fundamental optical concepts of designing multifocal ophthalmic
lenses and the mathematical methods associated with them. In particular, it is shown that the …

This paper describes the concept of an active optical subsystem for use in a demonstration
model of an ophthalmic implant in the context of human centered systems. The active optical …