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1 Department of Ophthalmology, University of Amsterdam, Amsterdam, The Netherlands.
Binocular disparity has a kinetic function as the physiological stimulus to fusion movements. The velocity of the fusion movement is a function of the magnitude of disparity. Retinal disparity also has a static function. Fixation disparity is the physiological stimulus to sustained fusional tonus.
Key Words: binocular disparity fixation fusion convergence divergence
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