DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Allergic conjunctivitis in the eyes of a 5-year-old boy. The skin around his eyes is inflamed. These symptoms are caused by an allergic reaction of the conjunctiva, the membrane that lines the inside of the eyelids and covers the sclera (the outer layer of the eyeball). The conjunctiva becomes red and swollen and produces a watery or pus-containing discharge. Allergic conjunctivitis is common, and can be triggered by factors such as cosmetics, contact lens solution or pollen. Treatment includes avoiding any known cause and using antihistamine eye drops to relieve the symptoms.
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