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A comparison of three methods for the measurement of progressive addition lenses
Author(s) -
Fowler C.W.,
Sullivan C.M.
Publication year - 1989
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1989.tb00813.x
Subject(s) - astigmatism , lens (geology) , optometry , optics , spectacle , computer science , mathematics , physics , medicine , economics , market economy
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.