Why Move The Eyes

Eye movements serve vision in three principal ways (Table I): to stabilize images on the retina, especially against movements of the head and body (image-stabilization system); to image the important details of the visual world on the most sensitive part of the eye, the fovea (foveation system); and to align the retinal images in the two eyes in order to promote single vision and stereopsis (vergence-accommodation system). Eye contact and avoidance also have very important roles in interpersonal behavior.



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