Often called "red eyes" or "pink eye," conjunctivitis is a common eye disease, especially in children. It may affect one or both eyes. Some forms of conjunctivitis are highly contagious and can easily spread in schools and at home. While conjunctivitis is usually a minor eye infection, sometimes it can develop into a more serious problem. See Dr. Susan Johnson if you think you have conjunctivitis. She can diagnose the cause and prescribe the proper treatment.