Optic neuritis is what caused the

Optic neuritis caused the reasons for the more complex, common as follows: (1) local inflammatory: such as uveitis, retinitis and sympathetic ophthalmia, such as eye inflammation may spread to the optic nerve; orbital infections, sinusitis, dental caries, tonsillitis and other infections can be directly involved lesions or the optic nerve caused by blood circulation. Inflammation, or induced by the optic nerve and eye tissue caused by allergic inflammation of the optic nerve. (2) systemic infections: such as tuberculosis, dysentery, diphtheria, syphilis, suppurative meningitis, sepsis or bacterial infection such as influenza, measles, such as herpes zoster virus infection, pathogens through blood directly involved optic nerve, or the optic nerve Allergic reactions caused by a pathogen. (3) demyelinating disease: in recent years that the disease is a autoimmune disease, may be infected with the virus caused the body to the hypersensitivity of myelin, resulting in nerve (including the optic nerve) in acute inflammatory changes, and then in myelin Loss. (4) poisoning: Ruyan, wine, arsenic, lead and ethambutol, isoniazid, and other outside poison through the skin or respiratory, digestive tract penetrated the body so that the optic nerve damage, cause visual impairment. (5) malnutrition and metabolic disorder: such as anemia, breastfeeding, pregnancy and lack of vitamins, such as hyperthyroidism can cause the optic nerve nutrition metabolism disorders, inflammation of the optic nerve.