spudskier,. .The ALPA website has an article concerning vision for pilots you may want to check out. It discusses several issues, but has a great section on sunglasses for pilots. Go to the ALPA website at <a href="http://www.alpa.org" target="_blank">www.alpa.org</a> and use the search. The title of the article is "Optimum Vision for Pilots".
The article does mention that pilots should stay away from polarized glasses because they can cause visual distortion through the windscreen.
Eff Oh - by the way, the distortion on the EFIS tubes may be because your glasses are polarized. I had some polarized lenses that fit over my prescription glasses. I had to quit using them because various screens in the cockpit would be blocked out by the polarization. Also, the windscreen would have dark blotches all over them. Now I just squint into the sun.