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THE EFFECT OF VERTICAL DIFFERENTIAL PRISM ON THE BINOCULAR CONTRAST SENSITIVITY FUNCTION
Author(s) -
Tunnacliffe Alan H.,
Williams Andrew T.
Publication year - 1985
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.1475-1313.1985.tb00687.x
Subject(s) - contrast (vision) , sensitivity (control systems) , prism , differential (mechanical device) , optics , function (biology) , physics , biology , electronic engineering , evolutionary biology , thermodynamics , engineering
— The binocular contrast sensitivity function is measured using horizontal sinusoidal gratings with base‐down prism before the right eye. In photopic conditions one prism‐dioptre causes a significant drop in sensitivity at all spatial frequencies and in mesopic conditions as little as a half prism‐dioptre has a similar effect. The implications for a physiological tolerance for unintended vertical differential prism in spectacles are discussed.