I have glasses, bi-focals and a pair for using the computer, need new ones badly.
I have one short-sighted eye and one long-sighted which the optician says is unusual, I can see pretty ok without glasses though distance and close up can be a problem. I don't wear my bi-focals very often though I do wear the ones for the computer a lot.
I had some vari-focals a few years ago and they were great but somehow I lost a lens and when I went for new ones I got the bi-focals again.