Dr. Cohen received his Ph.D. in retinal neuroanatomy in 1987 at U. Penn. Med. School in the lab of Dr. Peter Sterling. After post-doctoral fellowships at UCLA and the Univ. of Minn. with Gordon Fain, and Robert Miller, he joined the faculty of the Ophthalmology Dept at Yale University in 1992. After a visiting professorship at Harvard University with Dr. John Dowling, he joined FDA in 2003.