The recovery time for optic neuritis is related to various reasons such as the type of disease, physical condition, and treatment modality of the patient, and cannot be generalized. Optic neuritis is a common disease in ophthalmology and can result from a variety of causes, such as demyelinating nerve disease, infectious disease, tumor compression, autoimmune disease, and osteomyelitis-related optic neuritis. The recovery period, prognosis, and treatment varies from disease to disease. In the case of tumor or infectious diseases, the symptoms will be relieved in about 7 days by removing the tumor, contacting the compression, and using antiviral and nerve-nourishing medications; in the case of demyelinating diseases, recovery will usually take about 1 month; in the case of osteomyelitis-related optic neuritis, the treatment period is longer, taking about 12 months. Therefore, once a patient is diagnosed, he or she needs to improve fundus examination and cranial MRI in time to clarify the severity of the disease and give appropriate treatment.