The extensive and scattered literature on vergence eye movements is reviewed. Topics covered include the neural innervation to vergence, active versus passive divergence, muscular control, the accuracy of vergence, the interaction from vergence to accommodation, the independence of vergence and version, the sharing of responsibility with other eye movement controllers, the anatomical and physiological resting point, prediction and learning, drug effects, and the stimuli to vergence, i.e. fusion, accommodation and proximity.
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