Hey, I so sorry that you have more questions than answers now. My understanding (and I may be wrong so don't quote me) is that ON comes and goes as relapses come and go. The perifferial vision test is how well your eyes work when you aren't looking directly at something. When I had my last test, mine was fine. But I saw an eye surgeon for my test. This one is may concern the doctor because this is part of the vision that we use when we are driving a car. I am not sure exactly why he was concentrating on the perifferial vision. From my understanding, this could be caused by any number of things.
I wish I could wave a wand and have everything work out for you. Sometimes it just makes you crazy wondering why your body doesn't work like it should. My best remedy for worry is laughter. I find something to laugh about even if I have to call my crazy cousin who lives down south.
I hope you find your answers sooner rather than later.
Love many, trust few, always paddle your own canoe!
dx's: Fibro, 8th cranial nerve inflamation, MS.
meds.: none at this time