BLEFAROSPASM
BLEFAROSPASM - spasm of the age-old part of the circular muscle of the eye. Can be tonic and clonic. Tonic blepharospasm is a persistent spastic closure of the eyelids due to tonic convulsions of the circular muscle. Develops reflexively in response to irritation of the endings of the trigeminal nerve with eye diseases, organic lesions of the facial nerve and a number of other diseases of the nervous system; Can also have a psychogenic origin (hysterical, or essential, blepharospasm). Often tonic blepharospasm accompanies tuberculosis-allergic lesions of the conjunctiva and cornea in children, as well as skin diseases of the eyelids, especially in the presence of cracks in the outer corner of the eye gap. Tonic blepharospasm can also occur when a foreign body enters the conjunctiva of the upper eyelid or the cornea.
Clonic blepharospasm is less common. It manifests itself in an involuntary rapid flashing and is a kind of tick.
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