I've had a pair of Costa's with CR39 lenses that are now fuzzy with scratches, so I'm looking for a new pair. I've never worn a glass lens, but I'm considering them now. First of all, i've tried glass lenses on, and I can tell they are a little heavier, but I haven't worn them for hours on end. Do they get to be really heavy? The latest Outdoor magazine says the Smith glass lens is fantastic. I know Maui Jim has thin glass, any others?

Does anyone here have Kaenons? They claim that their SR-91 lens material is superior to any polycarbonate and is most like glass.

Anyway, I'd appreciate any advice.