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Uploaded on Aug 3, 2010
We depend on our eyes more than any other sense, however many of us take this precious gift for granted. Without them, we could not experience a beautiful sunset, see the faces of our loved ones, or view the natural marvels of the world. We rely on our eyesight for so much, but most people have only a vague idea of how our eyes work. There are actually many different parts of the eye working together to form a unique self-sustaining system. Though smaller than a ping-pong ball, the eye allows us to see, while cleaning, moisturizing and disinfecting itself at the same time.