How do I get my eyes used to sunlight without sunglasses?

Pretty much anytime I go outside during the day, I wear my sunglasses. If I go outside without them on, my eyes water and I have to squint quite a bit. Here in a few weeks, I won't be able to wear my sunglasses for a while, and I don't know how to get my eyes used to sunlight again safely. Going without my sunglasses while driving is probably not the best idea. Suggestions?