DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Allergic reaction in glaucoma patient. Close-up of an 81-year-old male patient with a swollen eyelid due to an allergic reaction to eyedrops used to treat glaucoma. Glaucoma is an increase in pressure within the eye, usually resulting from a defect in the drainage of the aqueous humour. This may be due to infection, trauma or other causes.
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