Visualiser

The Visualiser (also known as the Visualiser Eye, and referred to by Amy Pond as a "Dalek Librarian") was a piece of Dalek technology used in Kaalann to monitor the universe. It appeared to be a giant Dalek Eyepiece. It could also connect to the eye pieces of every nearby Dalek and scanned for intruders.(VG: City of the Daleks)