The effect of spatial frequency on binocular contrast inhibition.
Previous work has shown that binocular contrast summation, obtained with equal monocular sensitivities, remains constant over a range of spatial frequencies. We measured binocular contrast detection with a log 1.00 ND filter placed in front of one eye. For all eight subjects, the binocular contrast detection decreased to a level below that of the monocular detection, demonstrating a contrast analogy to Fechner's paradox. The degree of binocular inhibition, like summation, remained constant across the range of spatial frequencies.
Pardhan
S
S
School of Optometry, University of Bradford, UK.
Gilchrist
J
J
Douthwaite
W
W
D000328:Adult; D015350:Contrast Sensitivity / Q000502:physiology; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D009433:Neural Inhibition; D010364:Pattern Recognition, Visual / Q000502:physiology*; D012684:Sensory Thresholds / Q000502:physiology; D013997:Time Factors; D015348:Vision, Binocular / Q000502:physiology*