MRI
Bilateral long segment intraorbital optic nerve T2 hyperintensity, swelling, and contrast enhancement and associated optic nerve sheath contrast enhancement. Contrast enhancement of the optic nerve heads on 3D post-contrast FLAIR. Contrast enhancement of the left intracranial optic nerve segment is also present. No involvement of the optic chiasm. No brain white matter lesions. No intracranial mass or hydrocephalus.