A B C D E F G H I K L M N O P R S T U V W X Blepharoptosis Synonym(s) - Ptosis, Eyelid - Eyelid Ptoses Definition: Drooping of the upper lid due to deficient development or paralysis of the levator palpebrae muscle. Broader term(s) Eye Diseases Eyelid Diseases Blepharoptosis MeSH © U.S. National Library of Medicine®.