Prescription Lenses
My optometrist made up a pair with 30% transmission with a brown tint that takes out some of the haze.
Wispy clouds and haze domes do show up better which is quite useful for gliding. I find that advantageous over neutral grey.
Photochromic takes time to adjust.
It would be nice to try out some of the magic high technology lenses, but when you have a prescription, you either have to put up a whack of money or try clipons which come with their own set of problems.