My vision greyed-out with huge blind spots, double vision, things jumping around everywhere. It was in both eyes, but more-so my left. This was one of the first set of things that led to my diagnosis, and I waited for it to resolve itself before I went to a doctor - tried a General Practicioner, optometrist, absolute panic and all kinds of voodoo magic

(I was terrified I had a brain tumour or something equally nasty that would kill me).
I also had loss of bladder control, numbness, incoordination, falling and so on..and on...
That was in 2001, and I let it remit by itself. Even now though, when I look to my left, I see two of everything, and when I get out of a hot shower I can't focus on my reflection and things are fuzzy. Same applies on a hot day or when I am very tired.
So, yes, for me (although considerably better) this is permanent and I can't imagine it will ever go away. According my my neuro though, the steroids (if I had them) would not have changed the amount of damage the flare caused, only the duration of it. So the outcome would have been the same regardless.
I hope that this is totally different for you, but you know, I got used to it, and luckily, it is only a minor inconvenience (for me).
I hope this all works out well for you, and it all clears completely. Unfortunately, MS runs it's own race and all we can do is hold on tight, stay as positive as we can, and come here for support and friendship - they are a fabulous bunch of people.
Hugs
Lyn