There’s nothing that I like more than a few DIY projects, and this particular one is pretty fantastic. Personally, I think this a project for those who can’t afford Google Glass.
Basically, it is a way of taking off the polarizing light filter, which gives you a blank and white screen. All you need to do is put this filter on a pair of glasses, and you essentially have a view of a monitor that only you can see.
Just think of what you can see when you are in a public place. I am talking about personal information, not anything else, so forget about whatever NSFW stuff that you might have plans for, you pervs.
This project is from a YouTube user brusspup, who has some other interesting videos as well.