acctually i want them so i can wear while with that chick so she cant tell im not looking at her and thinking of someone else...
but seriously i know they reflect the sun obviously but if there is no sun i dont understand why they dont work as well as normal lenses in those conditions
Haha. Ok that is a valid argument.
Anyhow, they reflect light - right? So it will be darker. You need to pay more attention in school son. :P The less light your eyes have to work with, the less contrast you can make out. Since everything in gonna be white on white in the snow you want the most contrast you can get, with mirrored you can't see shiat and it will be too dark as well. Its kinda like wearing dark sunglasses in a tunnel.
Yellow/reddish lenses are great for cloudy days.