Definitions for ptosisˈtoʊ sɪs; -siz
This page provides all possible meanings and translations of the word ptosis
drooping of the upper eyelid caused by muscle paralysis and weakness
The prolapse of a bodily organ, especially drooping of the eyelid.
Origin: From πτωσις.
drooping of the upper eyelid, produced by paralysis of its levator muscle
Origin: [NL., fr. Gr. ptw^sis a falling.]
Ptosis is a drooping or falling of the upper or lower eyelid. 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 amblyopia. If severe enough and left untreated, the drooping eyelid can cause other conditions, such as amblyopia or astigmatism. This is why it is especially important for this disorder to be treated in children at a young age, before it can interfere with vision development.
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