Assertion: essential blepharospasm | /r/HasProperty | rare
Facets:
Source sentences:
text: Essential blepharospasm is rare but very troublesome and often incapacitating.
text: Benign essential blepharospasm (BEB) is a rare condition that causes the eyelids to spasm or uncontrollably close or blink from muscle contraction.
text: Essential blepharospasm is rare but very troublesome and often incapacitating.