1. J.E. Dowling, The Retina, an Approachable Part of the Brain (Harvard University Press, Cambridge, 1987).
2. A.E. Elsner, in: Handbook of Adaptive Optics, edited by J. Porter, H. Queener, J. Lin, K. Thorn, and A. Awwal (Wiley, New York, 2006), pp. 205-234.
3. Direct measurement of human-cone-photoreceptor alignment