This example is from Wikipedia and may be reused under a CC BY-SA license.
Ptosis occurs when the levator palpebrae
superioris (the muscle responsible for eyelid elevation) is affected on one or both sides, leading to eyelid drooping.
From
Wikipedia
This example is from Wikipedia and may be reused under a CC BY-SA license.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.