Gabriel Luna, University of California, Santa Barbara.
Located at the back of the eye, the retina contains light-sensing cells that convert light into electrical signals the brain can interpret. In this image of a mouse retina, blood vessels (stained in blue) deliver oxygen and nutrients to retinal cells, powering their activity.
About the Author
Michael W. Richardson
Michael W. Richardson is a writer and editor based in Brooklyn, New York, covering topics ranging from the brain and behavior to the environment.