Has anyone noticed the larger price difference when buying a pair polarized sunglasses vs non-polarized as compared to the price difference between just buying polarized lenses vs non-polarized lenses. Example. Polarized flak jackets are $210 vs $150 for non polarized, therefore a $60 difference. But polarized lenses for flak jackets are $90 vs $60 for non polarized, a $30 difference. So why have a $60 up-charge on polarized sunglasses when the lenses only cost $30 more?