I have them as well. Whether your eyes are opened or closed you see little squigglies? I see dots and squiggles. And it's like they float... If you don't move your eye, they seem to float down, and as soon as you move your eye, they're right there where you moved your eye to, right?
My eye doctor asked me once when I was really young if I had any of that, and then before I answered he said "no, nevermind you're too young for that" so I never found out what it is.
It's strange I read this today because I was thinking about it again this morning and plan to bring it up at my next checkup.