Contact lens simply put, are mini lenses that go directly into your eyes. They work by adjust your eyesight as any ordinary goggles would. The benefit? No need to wear specs, competent to play sports with contentment etc. The downfall: constant removing of lenses as well as cleaning them every hours of darkness.
u put them in your eye and you can see because the lenses are made by ur prescription!
http://health.howstuffworks.com/contact-.
They work only just like little eyeglasses that fit on your eye.
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