At the New York Times: A TINY glass telescope, the size of a pea, has been successfully implanted in the eyes of people with severely damaged retinas, helping them to read, watch television and better see familiar faces.

You mid-nineties gamers remember the antihero Garrett (Thief: the Dark Project / :the Metal Age / : Deadly Shadows / :Gold), having his eye twisted-out by the tree-thing Viktoria, had a steampunk mechanical [telescopic] eye built by the Hammerite, Father Karras.