Optic neuritis is essentially an inflammatory response of the immune system, primarily caused by disorders of the body's own immune functions. Patients with this condition are advised not to consume spicy foods, as these can lead to more pronounced immune dysfunction and potentially trigger these degenerative diseases. Therefore, it is recommended to avoid spicy foods. Additionally, patients with optic neuritis often need to take corticosteroids or immunosuppressants long-term, and should not consume spicy foods while on these medications. Besides avoiding spicy foods, patients with optic neuritis should also focus on eating fresh vegetables and fruits to enhance resistance and adjust immune dysfunction. Furthermore, they should consume foods high in B vitamins, such as soybeans, millet, corn, and sorghum.