[Hurt his eyes? Normally he doesn't notice but he can think of some specific times where the sunlight did hurt his eyes.]
If it's sudden, it does. But I have to be in a darkened room for a period of time and not have time to adjust.
[Like when he's wanting to sit depressed in a room in the dark with all the shades and blinds pulled tight and just avoid the world...but some idiots decide to invade his space and throw all of them open on a day where the sun is shining brightly and reflecting the light painfully off the snow.]