ABSTRACT
This study investigated fast disconjugate adaptations in subjects with bifoveal BSV and subjects with long-standing, small angled strabismus who clinically demonstrated no BSV (normal or abnormal). Eye movements were recorded using an infrared technique. An electronic feedback system, in which the calibrated eye movement position signal could be scaled by a factor (the feedback gain) to move the target visible to one eye during binocular viewing, was used to induce saccade disconjugacy. In all BSV subjects and three of six subjects with constant strabismus, saccadic adaptation occurred rapidly such that under conditions of visual feedback saccades became increasingly disconjugate. These disconjugacies persisted when normal viewing conditions were restored. The presence of an adaptive mechanism to adjust the binocular co-ordination of saccades, in the presence of constant strabismus with suppression and no clinically demonstrable BSV, has been demonstrated.
