Ptosis (eyelid)

Ptosis, also known as blepharoptosis, is a drooping or falling of the upper eyelid.

Ptosis of the eyelids
Ptosis of the left eyelid (unilateral ptosis). A headshot daguerreotype of an unidentified male, by William Bell in 1852.
Pronunciation	/ˈtoʊsɪs/

The drooping may be worse after being awake longer when the individual's muscles are tired.

This condition is sometimes called "lazy eye", but that term normally refers to the condition amblyopia.

Ptosis (eyelid) Media

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  Early fourteenth-century manuscript initial showing King Edward I of England and his wife Eleanor of Castile. The artist has depicted Edward's blepharoptosis, a trait he inherited from his father, King Henry III.

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  Neurotoxic ptosis caused by botulinum toxin: a 14-year-old botulism patient with bilateral total ophthalmoplegia with ptosis (left image) and dilated, fixed pupils (right image). The teenager was fully conscious

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  Phineas Gage displayed ptosis after surgery to treat wounds inflicted by a large iron rod entering his left cheek, passing behind his left eye, and exiting at the top of his head

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  Congenital Ptosis

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  Hollywood actor Forest Whitaker has a left eye ptosis