I have to go the prescription rout i'm afraid no serengeti's for me.
I have been wary about wearing contacts (i do this when i'm diving, not an avaiton compatible hobby i know), about 7 years ago on final in a K-21 i 'blinked' out a contact which made judging the hold of and flare interesting!
Since most of the stuff i fly has folded windows i'm guessing it should not be too bad, love to fly a bubble canopy!!