The Panum phenomenon requires presentation of 2 laterally displaced vertical parallel lines to one eye and a single vertical line to the other eye which gives rise to only 2 lines in the stereoscopic field with one of the lines appearing closer to the observer. The purpose of our experiment was to determine if stereoscopic depth perception would arise from spatially disparate Panum targets when the lines differed in brightness from each other. The present findings indicate that Panum targets which carry both a spatial disparity and a brightness difference give rise to stereoscopic depth perception.
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