The application of augmented reality using contact lenses and other types of head up displays was explored in the wonderful science fiction novel "Rainbows End", which was written by none other than "Vernor Vinge".
I remember one of the characters from the story, Robert Gu's friend, clutching a laptop -- a hopeless relic in that era -- saying, "I want to see what is really there, not what they want me to see."
I get the impression that would be me in that future, worried about what was real or not, or how many false memories I'd be recalling because of something that was shown to me. I'm probably just being paranoid, but so was this character and if I recall correctly, it worked out for him in the end.
"Rainbows End" was indeed wonderful. Another great exploration of AR in speculative fiction (and my personal favorite) is Charles Stross' "Halting State".
