A disparity gradient limit for binocular fusion

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Science  09 May 1980:
Vol. 208, Issue 4444, pp. 615-617
DOI: 10.1126/science.7367885


Ever since Panum, it has been commonly assumed that there is an absolute disparity limit for binocular fusion. It is now found that nearby objects modify this disparity limit. This result sheds new light on several enigmatic phenomena in stereopsis.