KINESIOL 1E03 Lecture Notes - Lecture 6: Kinematics, Retina, Vergence
15 Sep 2016
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Document Summary
Act on environment by the way we control our eyes. Reflexive movements keep viewed image fixed on the fovea: reflexive control, vestibular ocular reflex. Visual system and vestibular system work closely together. As head position changes, updates are sent to the muscles controlling the eyes. Muscles position eye in such a way as to cancel out head motion. When you move reflexively, eyes move quickly in order to keep object on retina. If eyes don"t counter-rotate, when head moves, eyes continue to move with it. When something shifts quickly, and head moves to follow eyes, eyes have t counter-rotate to stay fixed on object, that"s why eye position goes backwards when head moves forward: optokinetic reflexes. Automatic shifts in eye position to capture objects under dynamic condition (eg. when you"re moving) Cell phone + driving, shifts in eye movement are reduced dramatically. Eye tracker takes reflective measure of what a person"s seeing to see what eyes are doing.
