I have inordinantly sensitive eyeballs. It's almost a general pathology with me.

I agree with a previous poster about not wanting to sacrifice any night vision. Any loss of night vision for me would be practically crippling, particularly in a remote area with intermittent bright lights and/or traffic.

I ride a great deal at night, though not rando per se. I've found that cheap ($20 - $40 USD) over-glasses, like Cocoons or Solar-Shields are perfect for me because they don't interfere with my night vision at all (during the day, at least), and they help to alleviate problems with wind in the eyes, which also is a personal problem. Over-glasses are not for the stylish rider, but as far as I can see (no pun intended), that's the least of my concerns. I put them on over my regular glasses, and take them off when it's dark. Easy, peasy! Also, they are 100% UV resistant (and Polarized, which is something else I'd personally suggest)

Nevertheless, If I were in your position, I'd look for shades that both protect your eyes mechanically (like from twigs, dust, bugs and other things) and full, wrap-around sun protection. Again, If I were in your position, I'd go for a 2 pair of glasses approach -- regulars that you wear most of the time and the sun-shades. You can get 2 pairs of prescriptions or a regular prescription and some over-shades...

You only have one set of eyes, and your vision will never get any better