The sun glare can be quite nasty. I have an eye condition which makes them very sensitive to glare, to the point that looking into the sun in AH us quite painful. Wearing sunglasses does help, however the downside is when you get back to the normal, non-sun view, things get fairly dim. One has to be selective when they fly (when sun is not at the midpoint on the horizon) and from where they fly from (not flying into it to get to the fight). That's the best way I've found to minimize the effects.
