I did see a guy this summer that had them hinged on the outside of his mask. When he needed to see something detailed he would flip them down.
Can there possibly be someone other than myself odd enough to do that?
I have a pic in my profile showing the magnifyer glasses in full-dork position.
Only requires rubber bands to hold them in place.
They add just enough magnification to bring my gauges into focus.
Unfortunately, I doubt it would work with prescriptions, though, as the refraction is apparently greatly diminished with the lens surrounded by water instead of air.
Dave C