Optic neuritis is relatively common in neurology. It is a central nervous system demyelinating disease where the optic nerve is affected, leading to a significant decline in vision. However, patients with optic neuritis do not necessarily go blind. With prompt examination and treatment, mainly using corticosteroids, many patients can significantly recover their vision. However, neuromyelitis optica, another disease, tends to recur frequently. If there are many recurrences, it may lead to blindness. It may also cause corresponding lesions in the spinal cord, leading to paralysis and sensory disorders of the limbs. Therefore, it is crucial for patients to receive proper treatment in neurology, including immunosuppressants, and to regularly exercise to enhance physical fitness.