Ditto Big Ned.

I use two distinctly different types of sunglasses/glasses.

RayBan sunglasses with G-15 neutral gray tint. Designed for military flyers a loooonnnnggg time ago. Doesn't change the color of things you see. White is white. Blue is blue. Yellow is yellow. You won't find a better, sharper or more true lense. It's tempered glass and totally distortion free. Best acuity I have ever found. They first used green but it affects color perception. RayBan still makes green but it isn't anywhere near as good as G-15. Used to make a g-31 which wasn't as dark (number indicates percentage of light transmissin I believe), but I don't know if they still make it. I have tried everything but above the clouds at altitudes like 15-20,000 ft. or higher nothing works better that I have found. It's real bright up there and you need the best you can get. They filter out virtually all UV but I don't think they are polarized. Big Ned-you ever gotten in the cockpit of something like a King Air and installed a pair of polarized sunglasses on your head? The windshield instantly turns into a brown-striped opaque window you can't see out of. The windshields (and side windows) of a lot of larger aircraft are polarized and putting the polarized glasses on shuts out the light. I vote twice for RayBan G-15 sunglasses.

Randolph Rangers for hunting and shooting. If you want to make certain colors "pop" or mute certain background colors you can play with these and the interchangeable lenses. I don't think you will find any one "best" lenses color for every condition while flying however; I go back to the RayBans for that. Randolph's website has a lot of info about which colors do what under which conditions. I use brown, purple or yellow lenses depending on the sky and/or background, but all are designed to make orange targets stand out-and boy do they! The purple makes that orange targeet glow like neon! These might be great if your airplane is "target orange". Website has lots of good information.

Website:
http://randolphusa.com/