Again, I see the point of having glasses. After colliding with, and being stung by, two wasps last summer, I now wear glasses all the time while I'm riding. Doesn't do much against wind, but helps a bit. However, I personally can't wear anything with shading or tint of any kind. I was very happy to find a cheap set of protective glasses in clear polycarbonate in a local hardware store. Just today I bought a second pair to make sure I have another pair should my main pair be too scratched or broken.

Shading does nothing to protect from the direct sun anyway (it just diminishes the brightness a tiny amount - it still stings) so no difference there. Shading dramatically lowers overall contrast, so darker areas in the field of view become uniform and impossible to see any detail in, making it more dangerous in traffic on bright days.

Tints could be beneficial, but they screw with my brain, so I can't wear those either.