"Our software can then determine the location of the eyes and estimate where you're looking on the screen with an accuracy good enough to know which icon you're looking at," reads an explanation on The Eye Tribe site.

There has been a gradual shift toward hands-free technology in recent years, particularly in the gaming world. On the heels of Nintendo's popular Wii system, Xbox released the Kinect device, which lets users control their Xbox and play certain games using only their hands, legs and voices. Still, most of these devices have been more of a gimmick than a practical alternative to using one's hands to control a mobile device.

While most smartphones and other mobile devices to not come standard with an infrared device, Johansen said a replaceable filter would be an inexpensive, convenient option for most consumers.

And even as companies like The Eye Tribe work to create a commercially viable product for the average user, making the eye-controlled technology more accessible and less expensive will have similar benefits for physically disabled users.

"Then I can go to any computer, and then I can control it and I can use it, instead of just bringing my own," said Stig Langvad, who heads up Denmark's umbrella organization for people with disabilities. "So I'll be a part of society on an equal foot, instead of being a special solution."

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