This selection of articles from the Encyclopedia of the Eye covering retina, optics/optic nerve and comparative topics constitutes the first reference for scientists, post docs, and graduate students with an interest beyond standard textbook materials. It covers the full spectrum of research on the retina - from the basic biochemistry of how nerve cells are created to information on neurotransmitters, comparisons of the structure and neuroscience of peripheral vision systems in different species, and all the way through to injury repair and other clinical applications.