Since I've had glasses since childhood, I have never quite understood sunglasses. I had clip-on ones, but there's no point in handing a twelve-year-old with neither pockets nor purse a tiny flimsy thing of metal. I just never carried them. I could do it now, and I know why I would have to now (Mount Rainier in July. We have pictures. My pupils are *gone*.) but I have never picked up the habit.