Somebody told me that certain prescription lenses have anti-glare coatings that help a lot for night driving. I wonder how they`d do for biking. Also thinking that maybe glass lenses would be better since they aren`t as prone to scratching. I used to buy glass sunglasses that weren`t too awfull heavy but I can`t find that particular style anymore- all the glass ones I see now are fairly expensive. Might be a bigger problem with fogging, too. Anybody know how the glass/plastic deal works with reguards to fogging?