CORNEA: The eye’s protective, transparent cover, the cornea is similar to the protective glass on a camera lens. It bends the light entering your eye to pre – focus the image before it reaches your lens.
PUPIL: Muscles in the iris control this hole in the center, which, like a camera’s shutter, allows light to enter the eye and strike the lens. In bright sunlight, the pupil contracts to let in less light. In darkness, it opens wide to let in as much light as possible.
SCLERA: The whites of your eyes, sclera from a protective cover about the size of a ping – pong ball.
LENS: Like a projector in a moving theater, the lens focuses light onto the retina. It’s suspended in a muscle that changes the shape of the lens to focus on objects near and far faster than any computerized camera.
OPTIC NERVE: This cable carries visual information from your retina to the brain. Your brain processes the information and translates it into what you’re actually seeing.
Picture Credit : Google