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Updated: Jun 11, 2026

The Measurement and Treatment of Suppression in Amblyopia
Published on: December 14, 2012
The magnitude and dynamics of interocular suppression affected by monocular boundary contour and conflicting local
Yong R Su1, Zijiang J He, Teng Leng Ooi
1Department of Basic Sciences, Pennsylvania College of Optometry at Salus University, Elkins Park, PA 19027, USA.
Abstract:
A monocular boundary contour (MBC) rivalry stimulus has two half-images, a homogeneous grating and the same homogeneous grating with an additional disc region. The outline/frame of the MBC disc is created by relative phase-shift, or orientation-difference. We found the increment contrast threshold and reaction time to detect a monocular Gabor probe elevated on the homogeneous half-image pedestal. The interocular suppression begins as early as 80ms upon stimulus onset. Moreover, the suppression magnitude is larger when the MBC disc is defined by orientation-difference rather than phase-shift, revealing the suppression caused by competing local features in addition to MBC.
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