Benign essential blepharospasm is a focal dystonia relating to the involuntary contraction of the orbicularis oculi, procerus and corrugator muscles. The exact pathophysiology underlying benign essential blepharospasm remains unknown, although both genetic and environmental components are thought to underly the development of benign essential blepharospasm. This precipitates an abnormal and repetitive bilateral eyelid closure which results in functional blindness and significantly impacts patient morbidity and quality of life.