A person's eyes are his or her windows to the world. Sight is one of the most important senses a human being may have. There are several components involved in vision that help us perceive our surroundings. These parts work together to focus light so that one is able to see the images in his or her environment.
Light enters the eye through a transparent shield called the cornea. It is attached to the outer wall of the eye. The cornea focuses light rays so that they go in a straight line into the rest of the eye. …
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