He worked hard at training his eye and brain to tell the correct distance.

VOA: special.2009.03.18

But Dr Robert MacLaren, a specialist at Moorfields Eye Hospital who worked on the research, said they did not want to go down that route.

BBC: NEWS | Health | Cell transplants 'restore sight'

Dr. Greenberg could see the potential for creating a bionic eye if engineering issues could be worked out.

WSJ: FDA Approves Bionic Eye

They gave more than 1m of them residency rights, and turned a blind eye to the hundreds of thousands who worked illegally.

ECONOMIST: Iran