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The eye is a very complex system of cells and nerves. First light must reflect off an object to the eye. The cornea bends this light that passes through a hole of the pupil. The colored part of the eye, the iris, works like the shutter of a camera retracting to shut out light or opening wider to let more light in. The light is focused on the retina which is full of nerve cells. These cells are shaped like rods and cones. Cones translate light and colors and give you details. The rods translate light into peripheral vision and motion.
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