Wow, Kristie,
I have no idea, but I am so sorry for what has happened. The only thing I can recall is that someone else on the board posted a few months earlier with a similar experience, you could do a search with 'vision, optic nerve, eye' I think some of those words were used.
Did your neurologist give a more detailed explanation? It seems too much of a coincidence to have this happen twice.
Have they done proper eye tests, MRI etc - sometimes there are clots in the blood vessels behind the eye, very serious. Have you seen other specialists, and opthamologist (sp)??
I hope you find some answers to the soon and find yourself healing soon.
Joanne