DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Ptosis. Close-up of a drooping upper eyelid (ptosis) on a 59-year-old woman's face. Ptosis is normally due to a weakness of the levator muscle of the upper eyelid or to interference with the nerve supply to the muscle. In this case the condition was caused by a subdural haematoma (blood accumulation beneath the meninges) resulting from a road traffic accident. Other cases are congenital or due to disease.
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