Pink eye or the conjunctivitis is the infection or the swelling of the eye surface and the membrane that lines the eyelids. An uninfected eye is usually colorless and clear. The conjunctiva is usually exposed to bacteria and any other type of irritant. The infections are very common and are contagious among the children most likely in the learning institutions and day care. The newborns may also get it during the process of giving birth. This essay summarizes the causes, symptoms, diagnosis, treatment, avoidance and prevention of the pink eye (WebMD).