Thanks Karen. I know it's not total blindness, but what concerns me (if I do have MD), is the fact that it can't be reversed or cured - just maintained and in some instances - slowed down. My biggest fear is that I could eventually lose my ability to drive, and if I lose that, then I have lost the last of my independence! But I can't worry myself about that right now, and I'll cross that bridge if and when I come to it. Right now all I can do is wait for a diagnosis and hope for the best.