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Pinkeye is redness and swelling of the lining of the eyelid and eye surface. The lining is called the conjunctiva (say "kawn-junk-TY-vuh"), and pinkeye is also called conjunctivitis (say "kun-JUNK-tih-VY-tus"). The lining of the eye is normally clear and colorless.
Pinkeye is common. It usually spreads easily, especially among children in day care centers and schools.