A group of researchers has developed a way to use an eye tracking device to control a computer. This has been around for awhile, however, they developed a less expensive version ($1500) that works. The next cheapest model runs for $6900. This could help disabled people better access computers without killing their budget.
http://m.engadget.com/default/article.do?artUrl=http://www.engadget.com/2011/04/15/students-create-affordable-eye-tracking-tablet-for-the-disabled/&category=classic&postPage=3&icid=eng_latest_art
In my opinion, it sounds like there are more details that need to be work out in the near future.It will be very interesting and helpful if we can successfully implement a piece of technology like that to help many out.And even people with poor eye sight,short and long distance,color blindness and more can really use it also.
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