I have a pair of Dual sunglasses. Basically, they're sunglasses with a diopter for those of us who can't read without glasses. Just an FYI for those who seemed like they've been interested before (@trojanhorse), it seems they're now polarized and photochromic. I may need to buy a new set of lenses for mine because I think that's a great upgrade. I get tired of changing lenses.

Speaking of lenses, I think the mounting/securing of the lenses is the weakest aspect of these. it's not terrible, but I don't think they're as sturdy a they could be.