Ocular surface status in patients with hemifacial spasm under long-lasting treatment with botulinum A toxin: A comparative fellow eye study

Abstract

Patients with hemifacial spasm under long-lasting treatment with serial botulinum A toxin injections showed a reduction in tear film production and stability, as well as corneal sensitivity in the treated eye compared with the contralateral one. Tear film stability further decreased 1 month after the last injection.