From Yahoo News:
I have heard some strange medical stories, but this is nothing less than staggering. Apparently, a blind man from Ireland can now see as a result of an operation where "doctors inserted his son's tooth in his eye."
Yes, you read that correctly. "The technique, pioneered in Italy in the 1960s, involves creating a support for an artificial cornea from the patient's own tooth and the surrounding bone."
More details after the jump.