Anyway, I saw my ophthalmologist a few days after
onset. He noticed no change in my vision and because
of this, and also because of how quickly it came on, was not so sure it was ON after all. He thought maybe migraine, although conceded it could have been a less severe attack of ON (in terms of residual damage).
Have you noticed a change in vision in the affected eye, ie: blurry, cloudy, filmy? Is the pain a dull ache, a sharp pain, or like there is a foreign object in your eye?