Optic neuritis is a medical condition in which vision deteriorates rapidly over hours or days. One or both eyes may be affected.
This condition results for the demyelination of optic nerves. In most cases, the cause of optic neuritis is unknown. Patients may regain their vision or be left with permanent impairment.
- ↑ http://www.cdc.gov/vaccines/about/terms/glossary.htm#o