These are not real. Obviously, they’re metal and you can’t see through them.
But I could swear I had a Back To The Future style sunglasses like Doc Brown wore, back in the '80s. I recall they were thin plastic, mirrored on the outside, and that you could see through them. I’m pretty sure I didn’t buy them, but got them free somewhere. I think they were worn like a headband, rather than with temples; but I’m not sure.
Does anyone remember actual ‘Doc Brown’ glasses from back in the day?
I still have ‘em!
I always wanted a functional pair, and never quite understood why an approximation wasn’t possible. Outdoor illumination with a clear sky is about 10,000 lux. Dim but usable indoor illumination is 100 lux. So you could get away with reflecting 99% of the light, which would look just as good as a mirror. Especially if it were sealed around the edges like goggles.
I’m not sure if the brushed metal effect would interfere, but I suspect it would either not be a problem or you could come up with a reasonable simulation.
Got a pic?
Heck, I’ve just now made it my profile pic.