For me it's been repeated "attacks" of Optic Neuritis. That's another different ON.

As an MSer, Optic Neuritis is a common symptom and I've had maybe 7 or 8 of these episodes since my diagnosis. For me the Optic Neuritis has been very painful each time, and it seems the last one has never left.

My last bout was in January last year and the pain has never left in that eye. I have to assume that the myelin around that particualr Optic Nerve is Kaput!

I take a combination of medications to help control the pain and although it never goes away, some days the pain is better controlled than others.