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Saccadic Intrusion, Saccadic Pursuit

Saccadic intrusions are inappropriate saccades which interfere with visual fixation (static, or during motor pursuit: saccadic pursuit). Several types of saccadic intrusion are described, including ocular flutter, opsoclonus, and square-wave jerks. Saccadic (cogwheel) pursuit is normal in infants and may be a nonspecific finding in adults; however, it may be seen in Huntington’s disease.