My last glider had a blue canopy. I always flew with two pairs of
glasses, a pair of Serengetti's for most flying and a pair of Sun
Tigers for the days with lots of overcast or haze. I like the way Sun
Tigers cut through haze and give definition to the bottom of dark
clouds. The other option would be to get a pair of Serengetti's with
photochromic adjustment. These should lighten in the darker condtions.

Tim