HUMANS DEPRIVED OF NORMAL BINOCULAR VISION HAVE BINOCULAR INTERACTIONS TUNED TO SIZE AND ORIENTATION

A suprathreshold grating presented to one eye elevated the threshold for the discrimination of gratings similar in size and orientation presented to the fellow eye. The magnitude and stimulus specificity of these binocular interactions in human observers with normal binocular vision were similar to those in observers deprived of normal binocular visual experience; however, the latter showed afailure of binocular summation at threshold or subthreshold contrast levels. Whereas strabismus or amblyopia disrupted the normal excitatory interactions between the two eyes, cortical inhibitory binocular connections seem not to have been disrupted. Copyright © 1979 AAAS.