A 25 year old woman presents with blurred vision and pain with movements of her left eye for 2 days. Further questioning reveals that she experienced a brief episode of numbness in her left forearm around 6 months ago, which resolved spontaneously. Her medical history is otherwise unremarkable and she is not on any medications.
T2 weighted imaging shows three lesions in the periventricular region of the cerebrum; the left optic nerve demonstrates gadolinium enhancement.
Intraocular pressure: 14 mmHg (Normal: 10 to 20)