"...These demonstration programs are for Educational and Evaluation purposes only. They are provided for free...You will only need a webcam installed on your computer to run these demos..."
http://www.perceptual-vision.com/Nouse/download.html
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No webcam I'm afraid but if this really works I can see it has a great application for pc users with special needs. Can't understand the Government non-disclosure angle though, sounds a bit petty to me. I would have thought open source would be the way to go with this.

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By asking questions we sometimes get the wrong answers, from wrong answers we learn to ask the right questions.

Yes, good points.
I was picturing coming upon a computer class of head-bobbling students, as I read the articles.

Cool! I've been wondering about this ever since reading in 1978 how the Air Force, at Wright-Patt, was able to follow a pilot's eyes as he read his instruments by using a laser beam to track where his pupils were pointing.

Admittedly, I don't want a laser shining in my eyes, but it certainly wouldn't take nearly the power of a laser pointer to discern that, provided it had the right patter grid and reception.

Then you could simply have two sub-space bars below the space bar. One for the left-click, and one for the right-click.

Solid!

Or, just wink