I want these glasses, but with lenses. Not just any lenses, I want lenses that have electronically-controlled, variable tint. Not only would I get the benefit

I want these glasses, but with lenses. Not just any lenses, I want lenses that have electronically-controlled, variable tint. Not only would I get the benefit of sunglasses, but the tint could be run up when I'm significantly engaged with my built-in display. Sort of an indicator to others to avoid the social annoyances witnessed in modern, overly discreet mobile phone Bluetooth headsets (and no, I don't mean black them out and blind me, nor do I mean to signal muggers as to my distraction in a shady part of town, though I do see the benefits of Peril Sensitive Sunglasses).