Neuromyelitis optica spectrum disorder patients have more pupillomotor symptoms than multiple sclerosis patients and have life-threatening autonomic dysreflexia, severe hypertension, sleep–wake cycle disturbances, and postural orthostatic tachycardia syndrome. Neurological disturbances are a hallmark of multiple sclerosis (MS) and neuromyelitis optica spectrum disorder (NMOSD). Autonomic dysfunction is frequently present in these patients. However, due to its...