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Science 16 November 1979:
Vol. 206. no. 4420, pp. 852 - 854
DOI: 10.1126/science.493988
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Articles

Science, Vol 206, Issue 4420, 852-854
Copyright © 1979 by American Association for the Advancement of Science

articles

Humans deprived of normal binocular vision have binocular interactions tuned to size and orientation

DM Levi, RS Harwerth, and EL Smith 3rd

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 bioncular vision were similar to those in observers deprived of normal binocular visual experience; however, the latter showed a failure of binocular summation at threshold or subthreshold contract levels. Whereas strabismus or amblyopia disrupted the normal excitatory interactions between the two eyes, cortical inhibitory binocular connections seem not to have been disrupted.


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