Gorilla Armor 2 was launched this month, and it’s the latest version of the popular scratch-resistant glass for smartphones and tablets. The tech has been available for over a decade now ...

In terms of design, we don’t think it gets much better. The Oppo Air Glass 3 looks like a proper pair of specs, and though they are a bit too big and heavy, they could certainly pass for normal ...

School of Engineering, University of Warwick, Coventry CV4 7AL, U.K.