retinal ganglion cell types (IMAGE) Keck School of Medicine of USC Caption USC researchers use 3D microscopy and genetically engineered viruses to visualize and distinguish specific retinal ganglion cell types (shown here in green) from other cells in the retina (purple). Credit Image by Jim Stanis, courtesy of Dr. Arthur W. Toga and the USC Stevens Neuroimaging and Informatics Institute. Data provided by Dr. Michael S. Bienkowski, USC Stevens Neuroimaging and Informatics Institute. Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.