You could do your own experiment with reactolite sunglasses.
Not too expensive but they don't go from full clear but have a low level of filter.
I used to have a pair and although I am not a pilot I still needed to look out as well as in. The problem I had was they would shut down with the bright light outside which made viewing of instruments etc difficult.
I found the reactolite were fine for car driving as your car instruments are few, closer, and easier to read. For aviation I chose bifocals instead.
I had the distant portion in a Cat 3 filter and the reading portion clear. Looks quite sexy on the ground and a good opening gambit in the bar
