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Visual stimuli used to test short-latency disparity-vergence, accommodative-disparity vergence, and stereopsis. Monkeys wore liquid-crystal (LC) shutter goggles and viewed correlated-random-dot patterns, displayed on a video monitor, to provide dichoptic viewing in the short-latency vergence and stereopsis trials. Physical far and near LED targets were used to evoke accommodative-disparity vergence.
