The undesired distribution of irregular surface astigmatism (SA) on the freeform surface has
been the major concern of progressive addition lens (PAL) design. Herein, we proposed a …

We propose a numerical method for the design of a progressive addition lens (PAL) that can
accommodate more personal needs as compared to using the analytical solution of the …

A wavefront aberration analysis method for measuring spectacle lenses in real-view
condition is proposed and verified using experimental apparatus based on the eye-rotation …

We employed two-dimensional convolution processing and spline interpolation methods to
process the weight distributions (WDs) of the spherical and cylindrical power deviations, and …

In modern freeform surfaced optics manufacturing, ultraprecision machining through single-
point diamond turning (SPDT) plays a crucial role due to its ability to meet the high accuracy …

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

Raytrace evaluation capable of evaluating progressive addition lens (PAL) designs with
freeform surface and gradient index (GRIN) contributions is presented. The method is …

This study proposed an optimization method for freeform progressive addition lenses (PALs)
based on the coincident degree of weight distributions (WD) for power deviation and …

We present the design, fabrication, and characterization of a dual-surface sphero-cylindrical
progressive addition lens (DSOC-PAL), which combines the progressive cylindrical addition …

Astigmatism is inevitable and inherent to progressive addition lenses (PALs), which are
typically distributed in the lateral areas on both sides of the progressive corridor. In this …