Contact lenses are used as substitutes for eyeglasses. They are often worn by people who have vision problems such as astigmatism, near-sightedness, or far-sightedness. Contact lenses are small plastic discs that cling directly on the cornea.
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Contact lenses are used as substitutes for eyeglasses. They are often worn by people who have vision problems such as astigmatism, near-sightedness, or far-sightedness. Contact lenses are small plastic discs that cling directly on the cornea.