disease has inflammation site disease has feature Visual loss disease optic nerve disorder encephalomyelitis eye disorder optic neuritis https://rarediseases.info.nih.gov/diseases/7320/optic-neuritis https://www.malacards.org/card/optic_neuritis MESH:D009902 ICD10CM:H46 EFO:0007405 NCIT:C84950 SCTID:66760008 ICD9:377.39 MONDO:0005885 ICD10WHO:H46 ICD9:377.3 DOID:1210 icd11.foundation:210935787 ICD9:377.30 Optic neuritis is inflammation of the optic nerve, the nerve that carries the visual signal from the eye to the brain.The conditionmay cause sudden, reduced vision in the affected eye(s). While the cause of optic neuritis is unknown, it has been associated with autoimmune diseases, infections, multiple sclerosis, drug toxicity and deficiency of vitamin B-12. Vision often returns to normal within 2-3 weeks without treatment. In some cases, corticosteroids are given to speed recovery. If known, the underlying cause should be treated. GARD:0027731 UMLS:C0029134 MEDGEN:18181 cranial nerve II