The term blepharospasm ['blef-a-ro-spaz-m] can be applied to a forced, sustained, and involuntary closure of the eyelids. It stems from a number of causes, beginning with dry eyes, and, may progress to a state where the person is "legally blind". The blepharospasm referred to here is officially called Benign Essential Blepharospasm (BEB). "Benign" indicates the condition is not life threatening, and "essential" is a medical term meaning "of unknown cause".
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