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About Contact Lenses
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How Contact Lenses WorkContact lenses are a good alternative for visual correction, but require more care and effort from the wearer. Contact lens wear carries certain risks because the lenses are worn in direct contact with the surface of the eyes and can affect the functioning of the eyes. However these risks are minimised by taking proper care of the lenses and following the advice given by the optometrist. Contact lenses are held in place by surface tension as they float on a layer of tears that cover the cornea. Contact lenses form a barrier between the air and the cornea and interrupt the cornea's direct oxygen supply. With each blink, a fresh supply of oxygen-laden tears washes behind the lens to bathe and nourish the cornea. |
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