This morning, I was commuting in to work like I have done hundreds of times on the same route, when I got hit in the sunglasses by a tree branch. It was a tree I go under every morning, and I'd never hit a branch before. Didn't see it coming, either. Point of impact was on the left side of my sunglasses, and it pushed my glasses and raked my eyebrow pretty hard.
I share this because I think the sunglasses saved me a nasty eye injury today. I go every ride with either sunglasses or clear protective safety glasses - not primarily for this reason, but mainly as a place to put my Take-A-Look mirror. I keep whichever set of glasses I'm not currently using in a hardshell large sunglass case in my pannier.
I'd always enjoyed the protection from bugs (and assorted stuff) in the eyes, but today really brought home the importance of eye protection during rides for me.