Conjunctivitis can be very contagious. People who have it should not share towels or pillowcases and should wash their hands frequently. They may need to stay home from school or work and should stay out of swimming pools. Finally, not everyone with pink eye has conjunctivitis. Sometimes more serious diseases, such as infections, damage to the cornea, very severe glaucoma, or inflammation on the inside of the eye cause the conjunctiva to become inflamed and pink.
Vision is usually normal if the pink eye is really conjunctivitis.
If vision is affected, or if the problem does not get better in a few days, see an ophthalmologist.