Pink eye (conjunctivitis) is an inflammation or infection of the clear membrane (conjunctiva) that lines your protective fold and covers the white a part of your eyeball.
When little blood vessels within the conjunctiva become inflamed, they are a lot of visible. This is what causes the whites of your eyes to look red or pink.
Pink eye is usually caused by a bacterial or virus infection, an hypersensitive reaction, or — in babies — associate degree incompletely opened canal.