I'm sorry you're having such vision problems. While indeed optic neuritis generally affects only one eye, it unfortunately can affect both, as you're finding out. And while it often does resolve over time, like most things related to MS -- that's not necessarily so. As for how to improve your vision -- you really need to talk with the opthamologist about
that. I know that there are some aides for some vision problems related to having MS, but the only ones I know about
are related to having double vision. I wish I could be more helpful!
...I am not a doctor, nor health professional, and don't pretend to be one, here.....