SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Glaucoma. Fundoscopy image of the retina of a patient's right eye in a case of glaucoma. The retina is the light-sensitive layer at the back of the eye. This image shows excavation of the optic disc. Glaucoma is a condition in which the pressure of fluid inside the eyeball builds up to harmful levels. If untreated, it can cause blindness.
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