The effect of monocular defocus on binocular contrast sensitivity.
The monocular contrast sensitivity loss with defocus is well known. We measured binocular contrast sensitivity of sinewave gratings of 6 c/deg in the presence of different levels of monocular defocus. In the absence of defocus, the binocular sensitivity was about 42% higher than monocular. With increasing monocular defocus, the binocular sensitivity decreased steadily until it reached a level below the monocular, showing binocular inhibition. The clinical implications of binocular inhibition with monocular defocus are discussed.
Pardhan
S
S
Department of Optometry, University of Bradford, West Yorkshire, UK.
Gilchrist
J
J
D015350:Contrast Sensitivity; D006801:Humans; D015348:Vision, Binocular; D015349:Vision, Monocular