Popular Science has a great description of how those University of Washington "Terminator" contact lenses work:
"So far, our display has only one pixel. But someday you could use the
lenses to consolidate all the displays you interact with on a daily
basis—your clock, computer, television and phone—into one personal
display in your eye. In the distant future, your contact lenses could
augment your reality. If you were in a bare hallway, the computer in
your contact could put paintings on the wall.
"The light-emitting part of the contact lens is opaque, but these
little dark spots shouldn’t obscure vision. The control circuitry and
the radio harvest energy from a transmitter at the edge of the lens and
communicate with the world. They don’t block the view either. We don’t
have permission to test the lenses on humans yet, but animals have worn
it, and the lens was safe and functional."Read more.
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