This image provided Tuesday, May 6, 2014, by the University of Michigan shows a concept design for the Mobility Transformation Facility, a 32-acre simulated urban environment planned for the school’s campus in Ann Arbor, Mich. General Motors, Ford and Toyota are joining the University of Michigan in establishing a testing site for driverless cars that will simulate a cityscape and will work with the school to help make such vehicles commercially viable. (AP Photo/University of Michigan)
In this April 16, 2014, image from video Dr. Thiran Jayasundera, left, looks at Roger Pontz’s left eye as Pontz’s wife, Terri Pontz, right, looks on at the University of Michigan Kellogg Eye Center on April 16, 2014, in Ann Arbor, Mich. (AP Photo, Mike Householder)
In this April 16, 2014, image from video Roger Pontz wears special glasses that house a small video camera and transmitter at the University of Michigan Kellogg Eye Center on April 16, 2014, in Ann Arbor, Mich. (AP Photo, Mike Householder)
President Barack Obama pauses as he speaks about his proposal to raise the national minimum wage, April 2 at the University of Michigan in Ann Arbor, Mich. (AP Photo/Carolyn Kaster)
President Barack Obama waves as he arrives to speak at the University of Michigan, Wednesday, April 2, 2014, in Ann Arbor, Mich., about his proposal to raise the national minimum wage. (AP Photo/Carolyn Kaster)
President Barack Obama speaks at the University of Michigan, Wednesday, April 2, 2014, in Ann Arbor, Mich., about his proposal to raise the national minimum wage. (AP Photo/Carolyn Kaster)