Is binocular vision always monocular?

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Science  30 Jun 1978:
Vol. 200, Issue 4349, pp. 1497-1499
DOI: 10.1126/science.663633


Visual sensitivity of one eye was determined under binocular stimulus conditions yielding apparent fusion, stereopsis, monocular dominance, and monocular suppression. Marked losses in sensitivity accompanied monocular suppression but were not evident during stable singel vision. The results are inconsistent with the hypothesis that supression alone mediates binocular single vision.

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