"On a handful of prototype PC's, your look is your command." So starts the NYTimes story about eye controlled computers. "With eye-tracking technology embedded in the lid of a laptop, right, a computer user can guide the cursor just by looking at the screen. There's no more fiddling with the mouse on these computers. Just look at a particular location on the screen, and the cursor goes there instantly, ready for you to open a folder or to send an e-mail (at which point you need to use old-fashioned keys)."
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