I'll throw this out there again -- I've probably told this here a half dozen times by now. I bought a pair of prescription, polarized, photochromatic sunglasses from Action (now Smith) Optics more than 10 years ago. Glass lenses, Padre frame. I'm on my third pair of frames -- they've replaced them twice, most recently about 6 months ago. Lenses are near pristine because I'm careful: always in a case or always on a lanyard. They are great glasses, fit my huge noggin well, and don't slip. They're not super dark, and lighten as light gets low. They do fog pretty bad -- especially after a night of brown likker -- but I suppose I can't blame the glasses.
The prescription is about 3 clicks off now but passable, and I need bifocals now because my arms are too short and my flies are too tiny. About $300 to do it new.
Greasy, please stop littering our delicate resources with your el-cheapos