The pair of sunglasses are almost identical to their non-tech counterpart, save a tiny chip on its side. To pay, a person takes off the glasses and taps them on a Visa near field communication (NFC) enabled terminal. No card swiping required.
While the glasses aren’t available to the public yet, Visa is testing to see if there is a demand for them and if brands or banks want to sponsor the product.
Very soon we will be able to pay anything from anything. Good, bad? We’ll find out sooner than expected.
http://www.cnbc.com/2017/03/13/visa-pay-with-sunglasses.html