How do mirror sunglasses work? I used to think that they worked like "one way mirrors" but those are just half silvered glass - meaning that if you are standing in a bright room looking through it into a dark one you'll see your reflection but if you look from a dark room into a light room you can see through. But I noticed that with the mirrored sunglasses you can only see "out" no matter how the lighting is set up. So how do they work? Thanks.