Intra- and Postsaccadic Disparity-Induced Vergence Changes During Repeated Stimulations
The two primary stimuli eliciting disjunctive eye movements are disparity and blur, which lead to fusional and accomodative vergence movements, respectively. Accomodation and fusion work together to enable clear, single vision of objects, close or distant, because normally accomodative vergence alone is not sufficient being low the AC/A ratio (from 3 to 5), which leaves a divergence of visual axes during near fixation.
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