Off the screen, virtual displays have been proposed for more practical purposes—visual aids to help vision-impaired people, holographic driving control panels and even as a way to surf the Web on the go. "Looking through a completed lens, you would see what the display is generating superimposed on the world outside," said Babak Parviz, a UW assistant professor of electrical engineering. "This is a very small step toward that goal, but I think it's extremely promising."
http://www.engr.washington.edu/facresearch/highlights/ee_contactlens.html
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