* WDZ does some "research"... 
quote:
The rate of visual decline varies. Visual loss may occur over hours (rarely) to days (most commonly).
So, could happen in 48 hours, I guess...
Here's some more crap to read...
quote:
When someone develops optic neuritis, he or she notices several changes over a period of 2-5 days. The vision in the affected eye becomes blurred. Color vision is lost -- images appear as shades of gray. There may be pain with movement of the eye. There may be blind spots in the field of vision. Vision can get so bad that the person cannot even see light. An ophthalmologist will be able to see abnormalities in the way the pupil works and sometimes, see swelling and inflammation of the head of the optic nerve, inside the eye.
Optic neuritis usually gets better, even without treatment. In three quarters of patients, the vision starts to improve to some degree, in a few weeks. It can take several months for it to get to its maximum level.
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