n. a neurological condition in which there is involuntary closure of the eyelids. It may also manifest as an abnormal twitching or blinking of the eye. It is often caused by dry eyes, tardive dyskinesia, and Tourette’s syndrome, all of which result in visual disturbance.
BLEPHAROSPASM: “Blepharospasm does not necessarily mean a drooping of the eyelids but rather an involuntary contraction of the upper eyelid muscle.”