IIH is difficult to diagnose and treat. All professionals seem to have their own ideas, but it affects everyone differently. You can have IIH without affecting your vision or optic nerves..those are just symptoms of the increased pressure. I would look for another neurosurgeon, if he sides with the ophthalmologist..soley based on your lack of visual evidence. If your vision isn't in jeopardy they may suggest other things first, but they should still be treating your IIH.
Good luck!