Neuromyelitis optica is bilateral optic neuritis in the setting of demyelination of the spinal cord. Neuromyelitis optica is also known as Devic’s disease. Neuromyelitis optica occurs when your the body’s immune system reacts against its own cells in the central nervous system, mainly in the optic nerves and spinal cord, but sometimes in the brain as well.
What is Neuromyelitis Optica?

Clinical and pathological features of Devic's neuromyelitis optica and multiple sclerosis in Chinese patientsNeural Regen Res. 2010;5(8):565–571.Neuromyelitis optica and neuroregeneration
Neural Regeneration Research. Not Altered. CC.