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blepharoptosis

blepharoptosis in Medicine

blepharoptosis bleph·a·rop·to·sis (blěf'ə-rŏp-tō'-sĭs, -rō-tō'-)
n.
Drooping of the upper eyelid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for blepharoptosis

drooping of the upper eyelid. The condition may be congenital or acquired and can cause significant obscuration of vision. In congenital ptosis the muscle that elevates the lid, called the levator palpebrae superioris, is usually absent or imperfectly developed. If severe and not corrected in a timely manner, congenital ptosis can lead to amblyopia and permanent vision loss. Congenital palsy of the third (oculomotor) cranial nerve (which normally stimulates elevation of the upper lid) is a more rare cause of congenital ptosis.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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