I have two of the same pair of glasses, one with normal clear prescription lenses, and the other with prescription lenses that are tinted brown and polarized. I often forget to switch them out because the sunglasses make everything look so damn good, but I carry them both with me and usually switch to my clear glasses if I’m indoors for more than a minute. But if I pop into a gas station or something for 30 seconds then I’m definitely not taking them off.