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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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