I don't wear polarized while driving because of the rainbow effect when looking at the side windows and headunit screen. But I understand now there is something called half-polarized made for driving (polarized just enough without the rainbow effect).
As for lenses mineral glass is the clearest, then CR-39 plastic, then Trivex and finally polycarbonate is the worse for acuity.
Quoting: Anonymous Coward 56544252 Interesting.
Although I have a pair of Steiner binoculars with
special coatings (If you don't know, Steiner is good glass!)
The "cheap" plastic sunglasses I just bought give me
ALMOST a similar super-clear view like Steiner glass.
Not exactly as sharp...but close-enough for me.
Is it possible that our manufacturing is simply so good now
that plastic lenses can be made almost like glass?
And for cheap?
Q) How the F' do they make a profit on 10 buck sunglasses?
A) 
+ 
Certainly not 30 years ago...or even 20.
BUT....If you make expensive lenses.....
{would you maybe want to keep that a secret?
it's kinda' bad for business
don't you think?}
