Virtual Reality displays that you wear on your eyeball

Kudos to one of my students, Jessica Hatch, for spotting this great article about research into displays that you wear like a contact lens. The display opens the possibility of "augmented reality" whereby what you see normally can have computer-generated objects added to it. You might for example see floating arrows that indicate the direction you need to go in as you're walking around (a la Google Maps directions finder).

(I have to admit this sounds like something straight out of a novel by Philip K Dick)