Urza's Contact Lenses enters the battlefield tapped. Urza's Contact Lenses doesn't untap during your untap step. As long as Urza's Contact Lenses is untapped, all players play with their hands revealed. Clap your hands twice: You may tap or untap Urza's Contact Lenses.
"Obsession is Zur's one flaw as a magic user. His total preoccupation with immortality has become an affliction for his otherwise brilliant mind." —Jodah, Archmage Eternal