Optic neuritis usually affects one eye. Symptoms might include:  Pain. Most people who develop optic neuritis have eye pain that's worsened by eye movement. Sometimes the pain feels like a dull ache behind the eye. Vision loss in one eye. Most people have at least some temporary reduction in vision, but the extent of loss varies. Noticeable vision loss usually develops over hours or days and improves over several weeks to months. Vision loss is permanent in some people. Visual field loss. Side vision loss can occur in any pattern, such as central vision loss or peripheral vision loss. Loss of color vision. Optic neuritis often affects color perception. You might notice that colors appear less vivid than normal. Flashing lights. Some people with optic neuritis report seeing flashing or flickering lights with eye movements. 
optic neuritis affects eye  symptoms include:  pain  people who develop optic neuritis eye pain that's worsened eye movement  pain feels like dull ache eye  vision loss eye  people least temporary reduction vision  extent loss varies  noticeable vision loss develops hours days improves weeks months  vision loss permanent people  visual field loss  side vision loss can occur pattern  central vision loss peripheral vision loss  loss color vision  optic neuritis affects color perception  notice colors vivid normal  flashing lights  people optic neuritis report seeing flashing flickering lights eye movements
optic neuritis