Neuromyelitis Optica or Devic’s disease is an immunological disorder that may be diagnosed as multiple sclerosis. It is mostly caused by attacks in the immune system on the optic nerves. Patients with neuromyelitis may experience attacks at the same time or sometimes at different times. Patients may also have problems with their optic nerves or spinal cord problems and still have Neuromyelitis Optica (Devic’s disease). It is a type of chronic disease of the nervous system that affects mainly the brain and the spinal cord. This may be caused by the inflammation of the optic nerve and spinal cord.