Photoreceptor Structure and Function in Patients with Congenital Achromatopsia Mohamed A. Genead, MD, 1, 2 Gerald A. Fishman, MD, 1, 2 Jungtae Rha, PhD, 3 Adam M. Dubis,
Ruwan A. Silva & Thomas A. Albini & Harry W. Flynn Jr. Received: 18 September 2011 /Accepted: 9 November 2011 /Published online: 26 November 2011 # The Author(s)