Buy Glasses Online, And Try 'Em On First
This site, EyeBuyDirect, has a special feature where you upload your pic and try their glasses on. I love it! It's a little rough, but you can shrink or enlarge your photo so the glasses fit and you can move the glasses around on your face. Be patient, you'll get it eventually.

There's a discount there now, too, through the TechBargains link, 30 percent off all orders until 5/24, with the discount code techbar30. Yay! You can be frugal while avoiding bumping into things.

P.S. I'm on deadline or I'd upload a few of my try-on shots.