This bowling-ball eye with its rubber-band muscles shows how your eye moves and how it filters the visual information it takes in. The clear area in the middle of the mostly fuzzy view represents the image that the brain receives. The clear spot comes from the part of the eye called the fovea, which is packed with light-sensing cells. Despite the hazy view outside the center of our field of vision, our perception is of a wide-angle, clear scene. Constant eye movements allow the brain to collect different views, creating the visual reality we perceive.
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