Conjuctivitis, also known as pink eye, is a medical condition that is characterized by the inflammation of the conjunctiva, the outermost layer of the eye and eyelids. Symptoms include blurred vision, pain in the eye and sensitivity to light. The most common cause of conjunctivitis is viral infection but there many other causes, such as prolonged use of contact lenses or allergy. Hence, the treatment will vary with the underlying cause. However, the prognosis is generally good provided treatment is sought and the offending allergen is removed (for allergic conjunctivitis). In many cases, the condition resolves on its own without intervention. However, if the discomfort is too great or the symptoms suddenly worsen, it would be prudent to consult a medical professional. Recurrence of conjunctivitis in the home or in a school is a common complication that can be avoided if proper hygiene practices are followed.