Optic neuropathy caused by type A botulinic toxin

Purpose: To report the development of an optical neuropathy after injection of type A botulinic toxin in a subject with blepharospasm. Methods: Optical neuropathy was evaluated through study of visual sharpness, colour test, visual field, OCT, fluorangiography and determination of VEPs. Results: Venous steroid treatment and neuro-protectors (Vitamin B6 and Citicoline) led to resolution of the clinical picture. Conclusions: The authors draw attention to the need for correct administration of the botulinic toxin in the treatment of blepharospasm.