I noticed the comment about getting neutral density glasses, rather than polaroids, was well buried in the thread - but I'd like to second it. If you fly aircraft with stress-formed perspex, you can get some very odd polarization effects which can be distracting. Actually, despite flying a bubble canopy aircraft in the Oz sun, I prefer my regular untinted varifocal glasses, a decent cap, and some suction roof shades on the brightest days. I find that even neutral density sunnies do impact what I can see on the ground. I'm prepared to believe that everyone is different but try the hat and shade before going for the ace of he base look
