About This Condition
Conjunctivitis is inflammation of the clear membrane that lines the eye.
Conjunctivitis is caused most commonly by infection from viruses or bacteria, or by an allergic reaction, though other causes exist, such as overexposure to sun, wind, smog, chlorine, or contact lens solution. Pink eye is the common name for conjunctivitis. Blepharitis is inflammation of the eyelid; most commonly, it is caused by a bacterial infection.
Conjunctivitis and blepharitis may cause mild discomfort with tearing, itching, burning, light sensitivity, and thickening of the eyelids. They may also produce a crust or discharge, occasionally causing the eyelids to stick together during sleep. The eyes and eyelids may become red, but usually there is no blurring or change in vision.
Individuals with diagnosed conjunctivitis should avoid irritants, such as contact lenses or allergy-causing agents.