Definition of "blepharospasm" [blepharospasm]

• Spasmodic winking caused by the involuntary contraction of an eyelid muscle. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Ray Greek, M. D.Science AdviserNational Anti-Vivisection SocietyChicago, IllinoisCorrectionIn the "Popular Shots" graphic accompanying "A New Reason to Frown," we reversed meanings and should have said that an eyelid spasm is called blepharospasm, and lazy eye is strabismus."
• "However, BOTOX (c) is a registered trademark for a prescription drug product used successfully around the world since 1991 to treat a rare and previously devastating condition known as blepharospasm, in which a sufferer's eyelids spasm to such an extent as to cause functional blindness."
• "Simon, 40, was diagnosed with a form of dystonia called blepharospasm in 2005."