Optic neuritis usually causes a decline in the patient's vision, with noticeable decrease in either unilateral or bilateral vision. Commonly seen in clinical practice are simple optic neuritis, as well as optic neuritis caused by multiple sclerosis, and optic nerve pathology caused by neuromyelitis optica. Essentially, optic neuritis is an autoimmune disease, primarily caused by the demyelination of the optic nerve. In terms of diet, there are certain foods to avoid. First, spicy and stimulating foods. These types of food can disrupt the body's immune function, causing vascular nerve congestion, which is detrimental to the recovery of optic neuritis. Second, overly greasy foods. Foods that are too greasy can also affect the blood supply to the nerves, prolonging the recovery time of optic neuritis.