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Samsung uses technology named "Smart stay" on their Android devices (Samsung Galaxy S III):

It waits till you're asleep: the screen maintains a bright display as long as you're looking at it. Samsung Smart stay

Is there software to achieve the same behavior on a Windows laptop? Simply put, the software should use the webcam of the laptop and turn the screen off if there was nobody watching the display.

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I am also looking for a solution to prevent screen saver based on looking at the screen. If you find something please text me ;) –  Gandalf Apr 28 '13 at 21:12

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