Optic neuritis is inflammation of the optic nerve. It can be caused by a variety of diseases, but often has no identifiable cause. Inflammation of the nerve can cause loss of vision, dimming of vision, decreased color perception and pain when moving the eye. In most cases of optic neuritis, the nerve appears swollen, and small hemorrhages may be visible.
Optic neuritis can be specifically treated with anti-inflammatory medications. It is more important to identify the underlying cause of the inflammation through imaging studies and general medical evaluation.