Ever wanted to hide what you're looking at on your monitor? Well now you can, with a simple DIY-style adjustment and a fair bit of patience, you can make a monitor that can only be seen by wearing a pair of glasses.
The science behind it is in fact very simple. On every LCD screen there is a backlit monitor covered in a polarising filter. By peeling of this polarising filter (simply a film layer attached with a light adhesive) all that can be seen now is a white square. The trick is, the polarising filter can then be used to view the information being displayed.
Glasses are the most immediate and obvious choice, giving one user the information on screen. This has purposes in privacy primarily, but uses can be seen in the future for parental control of the computer, by confiscating the glasses a child would no longer be able stay wasting their life inside in front of a screen. God forbid children might even learn how to interact socially in society.
Art installations and advertising may even see some interesting outcomes for this quirk in technology.
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