If I buy new sunglasses, I hope I can find some that fit my face a little better. Recently I tried wearing my Tifosis with the earpieces outside of the helmet straps, and they didn't stay on very well. I know you can get an elastic band that goes around the back of the head to hold glasses on, but what good will that do when I need to put my sunglasses on while rolling?
Then there are lenses that change automatically according to light conditions. How quickly does the lenses' color change? Fast enough that you aren't blinded if you suddenly go from bright sunshine to a shady stretch?
I believe you can get some little pads to put on the glasses' nosepiece (or whatever it's called). I hope I remember to ask about them next time I'm at the bike shop.
The more I think about this, the more there is to think about. But it's a good thing I don't have a committee of horses deciding this thing. The neighs (ha-ha!) would have it for sure.