A comparison of three methods for the measurement of progressive addition lenses.
Three methods of measuring aberrational astigmatism in progressive addition spectacle lenses are described. Measurements are presented from each method made on an Essilor Varilux 2 lens, which illustrate the small differences between the methods for low power lenses.
Fowler
C W
CW
Vision Sciences Department, Aston University, Birmingham, UK.
Sullivan
C M
CM
D005139:Eyeglasses; D008722:Methods; D055095:Optics and Photonics