Saccadic and disjunctive eye movements in cats

We monitored eye movements in cats with their heads immobilized, using videotaped television recordings of pupillary translations and d.c. electro-oculography. Cats only deviate their eyes by up to 20° from the midline: they hold fixation quite constant for up to several seconds: they can make pure conjugate saccades without changing convergence angle; they can converge and diverge their eyes by many degrees to follow interesting objects. The disjunctive movements are difficult to elicit repeatedly and are generally much slower than the conjugate movements, whose velocity increases with amplitude up to about 300° sec^-1. © 1972.