We first explore the operating principle and optical performances of dioptric-power and
astigmatism-variation lens doublets based on the LW Alvarez design. These fall within the …

Purpose: The current commercially available phoropter that is used in clinic is bulky and is
not user friendly (cannot be operated by the subject). The measurement is not accurate …

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 …

Gradient-index Alvarez lenses (GALs), a new, to the best of our knowledge, type of freeform
optical component, are surveyed in this work for their unique properties in generating …

Alvarez and Lohmann lenses are variable focus optical devices based on lateral shifts of two
lenses with cubic-type surfaces. I analyzed the optical performance of these types of lenses …

This paper proposes an accommodative intraocular lens (IOL), which consists of a two-
element Alvarez lens and an aspheric lens for changing focal power and refractive power …

Progressive addition lenses and commercial instruments limitations Page 1 179/PD1-1
Progressive addition lenses and commercial instruments limitations Denis Mazuet Research …

In this paper aberrations in Alvarez–Lohmann lenses are analyzed, and a semi-analytical
strategy for compensation is derived. An x–y polynomial model is used to describe the …

For designing optical systems with tunable anamorphic ratios, we extend Hopkins's design
procedure, which is restricted to spherically symmetric elements, with fixed optical powers …

We present a comprehensive approach for the design of adjustable-focus lenses based on
the Alvarez principle. The design methodology consists of dividing the lens into two parts …