Binocular vision: two possible central interactions between signals from two eyes

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Science  07 May 1976:
Vol. 192, Issue 4239, pp. 561-563
DOI: 10.1126/science.1257791


Both foveae of light-adapted subjects were stimulated at the same time with monocularly presented lights of increasing or decreasing luminance. Combinations judged just detectable violated predictions of the energy summation and the probability summation hypotheses of binocular interaction. Rather, the results can be explained by independent central neural mechanisms that signal the sum or the difference of stimuli to two eyes.