HOW DO LIGHT ENTERS THE EYE?
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Light enters the eye through the cornea. This is the clear, dome-shaped surface that covers the front of the eye. From the cornea, the light passes through the pupil. The iris, or the colored part of your eye, controls the amount of light passing through.
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Light passes through the front of the eye (cornea) to the lens. The cornea and the lens help to focus the light rays onto the back of the eye (retina). The cells in the retina absorb and convert the light to electrochemical impulses which are transferred along the optic nerve and then to the brain.
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