As common courtesy I would have lowered all but one window shade, and that I would just explain that I'd like to keep that a crack open and will lower it before I go to sleep. That way, it solves everyone's problems.
I take it at heart that the sun shines in and shines onto somebody's eyes. If YOU were in the seat and fast asleep, the last thing you want is to woken up by the sun's first rays. True, you might not have thought of putting eye shades on, but it's just being polite to be thoughtful.