Effects of interocular suppression on spectral sensitivity.
A stable form of interocular suppression, referred to as "permanent suppression," can be produced by presenting a contoured field to one eye and a spatially homogenous field to the fellow eye, a viewing condition analogous to the classic "hole-in-the-hand" illusion. We examined the relation between permanent suppression and binocular rivalry suppression by comparing the changes in the increment-threshold spectral sensitivity function produced by these two forms of suppression. Permanent suppression produced a reduction in spectral sensitivity; however, in contrast to binocular rivalry suppression, the sensitivity alterations associated with permanent suppression were independent of the test-probe wavelength. The different patterns of sensitivity loss observed during binocular rivalry and permanent suppression indicate that different neural mechanisms mediate these two forms of interocular suppression.
Ridder
W H
WH
Southern California College of Optometry, Fullerton.
Smith
E L
EL
Manny
R E
RE
Harwerth
R S
RS
Kato
K
K
D006801:Humans; D011601:Psychophysics; D012684:Sensory Thresholds; D015357:Vision Disparity / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology