"In this April 16, 2014 image from video Dr. Naheed Khan, right, works with Roger Pontz, left, on an exercise to test how well he sees shapes on a computer screen at the University of Michigan Kellogg Eye Center, April 16, 2014, in Ann Arbor, Mich. Pontz suffers from a degenerative eye disease called retinitis pigmentosa and is the second patient in the U.S. to surgically receive a ""bionic eye"" since the U.S. Food and Drug Administration signed off on its use last year. (AP Photo, Mike Householder)"