20/20 is an weekly format American news show on the ABC network. While it does look at news in depth, the producers favor a more human interest approach to the stories on the show. Current anchors in 2008 are John Stossel and Elizabeth Vargas.
It is also the medical descriptor attached to normal eyesight. An abbreviation, its expanded meaning is that an object 20 feet away, in fact appears to be 20 feet away to the patient.