This is something I am always fighting with my Porsche Windshield customers.
They all want the cool look of a tinted windshield, but complain about
visibility
on murky days. I suggest multiple helmet visors of varying densities and
the same
fix will work here. Get clear perscription lenses if you can't see without
glasses and
go to a good sporting goods store that has "flip down outfielder glassses".
The baseball
guys have this almopst figured out and I like their solution.