Optic neuritis may occur in one or both eyes. In children, both eyes are usually affected, while adults usually have only one eye affected. Symptoms may appear suddenly and may include a rapid and severe decrease in vision (in one or both eyes) or blurred or dim vision. There can be eye pain and headache. There also may be abnormal color vision (where colors appear dull and faded).
Children with optic neuritis may have had a fever, flu-like illness or immunizations one to two weeks before symptoms of decreased vision.
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