I'm also a specy.......You could always try these...
http://www.ihaveawebsite-nowwhat.co....sunglasses.htm I wear metal framed specs but I think the clip is big enough to go over other frame types.
I used to have bluey/black ones but my instructor pointed out what that colour can do to your depth perception on final in certain conditions (He's also a specy so obviously tried lots over the years). He made me land with and without sunglasses - guess which were the better landings ??

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Swapped to the brown ones (polarised) - brilliant. Went up recently in sunny haze and I could see much better with them than without them.
Apparently, if you can find the orange ones - they're good as well.