I don't have glasses, but if I had, one thing I know I'd do is get square frames. Square'ish.
But definitely not completely round ones. Yeugh.
Oh, and by the way, I don't have perfect vision, which means I should wear glasses (though it's not that far off from a normal vision, so I can manage just fine), but they don't want to get me glasses. Something about them making the eye lazy, constricting vision (and, deep inside, as I'm sure, would rather not spend the money, even though glasses aren't that expensive).