Does she have blue eyes? Blue eyes are more sensitive to light and the lighter they are the more sensitive they are. My husband has very light blue eyes and has to wear sunglasses in sunlight otherwise it hurts his eyes.
Same here with brown eyes. I’m thinking I might be to blame because I never have the big lights on or let the sun shine in?
Mine does that too, especially in the car. We got the window screens, it helped a ton.