DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Chalazion abscess. Close-up of a chalazion abscess on the eyelid of a 70-year-old female patient. This condition arises from a cyst, also known as a meibomian cyst. It is caused by the obstruction of one of the meibomian glands that lubricate the edge of the eyelid. Chalazions are usually painless and often disappear without treatment. If the swelling is large, however, it can put pressure on the surface of the eye, blurring vision. In these cases they can be surgically removed from behind the eyelid under local anaesthetic. A meibomian abscess is formed if the cyst becomes infected, filling the cyst with pus (as here).
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