The recurrence rate of optic neuritis is quite high because this disease is a type of demyelinating disease of the central nervous system, caused by an immune dysfunction in the body. This immune dysfunction produces abnormal antibodies which attack the optic nerve, as well as the brain and spinal cord, leading to a variety of clinical manifestations. Therefore, as long as the patient's immune function is disordered and not corrected, recurrence is very likely to occur. To prevent the recurrence of optic neuritis, the main aspects include: First, regular physical exercise should be done to enhance physical fitness. Second, it is crucial to follow the doctor's advice and take corticosteroids or other immunosuppressants for a long time, which can help suppress the immune dysfunction. Third, dietary habits should also be carefully managed, with an increased intake of fresh vegetables and fruits and avoiding spicy and stimulating foods.