BRAIN - New technique classifies retinal neurons into 15 categories, including some previously unknown types

As we scan a scene, many types of neurons in our retinas interact to analyze different aspects of what we see and form a cohesive image. Each type is specialized to respond to a particular variety of visual input—for example, light or darkness, the edges of an object, or movement in a certain direction ...

http://medicalxpress.com/news/2014-03-technique-retinal-neurons-catego