Good point - I didn’t consider the physics, only the cosmetics! :-)
Still, a boy can dream, right? Like, how about a mask that works like ’google-glasses:’ not only displaying all of your critical info from your dive computer, but also with something that focus’ on the marine life and offers little pop-up flora and fauna id briefs, along with picture-taking capability? So you can tell if you’re being attacked by a great white or an oceanic white-tip without all of that bothersome book-learning and memorization!