Hi, I am sorry to hear about your situation but don't get discouraged or terrified. I have also one M growing around my left optical nerve. The first signs were like yours, black eye and less vision in that eye. However, I had surgery in 2012 and now my vision is almost back to normal. I do not need glasses for driving only reading. By the way, nobody in my family (as far as I know) had such a brain tumor and I am otherwise a very healthy person. Again, it's difficult but please stay positive...it will help you overall and in making decision, etc. All the very best to you....