Kami usually stands on the border of Kami's Lookout to watch what happens on the Earth. Upon becoming the Guardian of Earth, Dende also displays this habit. Piccolo also gains the ability after fusing with Kami.
Old Kai claims to have an "omniscient vision" and he usually uses it to see girls playing beach volleyball (in the Manga, he instead claims that he uses such an ability to see women strip naked). He also uses it with a Crystal Ball to watch the fight against Majin Buu.