Worldwide, more than one billion people suffer from poor vision because they do not have
the eyeglasses they need. Their uncorrected refractive errors are a major cause of global …

Microinjection molding is a mass production method to fabricate affordable optical
components. However, the intense nature of this process often results in part deformation …

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 …

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 …

The diopter power and magnification matrices characterize the first-order properties of
ophthalmic lenses for different gaze directions. Therefore an efficient method to compute …

ABSTRACT Luiz Alvarez and Adolf Lohmann independently invented specific kinds of
varifocal lenses in the late 1960s. The focal length of these lenses is changed by a lateral …

The main focus of this dissertation is to seek scientific knowledge and fundamental
understanding of molding process for freeform optical lens fabrication by integrating freeform …