Well there was the idea of the third picture here: http://theinspirationroom.com/daily/2012/3m-privacy-for-your-eyes-only/ http://theinspirationroom.com/daily/2

Well there was the idea of the third picture here: http://theinspirationroom.com/daily/2012/3m-privacy-for-your-eyes-only/ http://theinspirationroom.com/daily/2012/3m-privacy-for-your... It's from an ad for a privacy screen filter, but unlike that, it works the other way around too, blocking out the world.