A rodent retina was bisected and imaged using a scanning electron microscope.  Cells with specialized functions are organized in discrete layers of the retina and provide a functional architecture that is responsible for vision.  The layers are artificially colored.

Image by Peter Westenskow, staff scientist at Lowy Medical Research Institute (LMRI) and research associate at The Scripps Research Institute (TSRI); Malcolm R. Wood, director of Core Microscopy at TSRI; and Martin Friedlander, president of LMRI and professor at TSRI.