Just an FYI, Younger Optics makes a lens that is called "Drivewear", they are a photocromic sunglass lens( they change colors) and they are polarized as well. They are not like the Transition lenses that have been out for some time now ( generation VI ) that goes from clear to a mild tint- the transition lenses are NOT sunwear and dont get dark and are temperature sensitive, in other words, the hotter it is, the less dark transition lenses get and they do not change to dark while insidea vehicle, the Drivewear lenses really enhances colors, unlike a regular grey/smoke colored tint.
Ive got a pair of the drivewears that I use while flying as well as driving and I really like them.
John