Assertion: blepharospasm | /r/HasProperty | tonic contraction
Facets:
Source sentences:
text: Blepharospasm is a progressive disease accompanied by involuntary tonic spastic contractions of the circular muscles of both eyes lasting from several seconds to several minutes - a clonic (rapid and intense blinking); tonic contraction (spasm), leading to a narrowing of the eye gap and over the years even to complete closure.