Photochromatic coatings -- https://en.wikipedia.org/wiki/Photochromic_lens -- have existed for a while and are sold on safety glasses, at least according to a cursory look at a large online retailer's site.
That said, I'm not sure I'd want smart glasses. Being stuck on a computer for work, I try to take some time every day to be completely free of digital things. It's hard enough to do that with a smart phone in my pocket vying for my attention. I imagine it would be only harder with smart glasses over my eyeballs.
That said, I'm not sure I'd want smart glasses. Being stuck on a computer for work, I try to take some time every day to be completely free of digital things. It's hard enough to do that with a smart phone in my pocket vying for my attention. I imagine it would be only harder with smart glasses over my eyeballs.