Thanks, you guys, for your nice comments.
I spent some time at the doctor, who told me that the retina has not detached (yay!) . . . yet (boo!). Actually, I'll probably be fine. Most people get "floaters" and "flashes" as they age. AGING! WHAT AN ADVENTURE! I just have an extreme case of it. However, the onset was a little dramatic. Also, he said, people who have had cataract surgery and who are as near-sighted as I am have a twenty times greater chance of having the retina issue, so we are in observation mode for now.