MARK CLARKE / SCIENCE PHOTO LIBRARY MARK CLARKE / SCIENCE PHOTO LIBRARY
Conjunctivitis. Mother applies eye-drops to her three year-old son's eyes to treat conjunctivitis. Conjunctivitis is an inflammation of the membrane (the conjunctiva) that lines the inside of the eyelids and covers the white of the eye. Allergic conjunctivitis can be a reaction to wearing contact lenses, or caused by environmental factors such as pollen, pollution or cigarette smoke. Antihistamine eyedrops, as in this case, can be given as treatment.
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