Jul 5, 2018


A class of neurons on the inner surface of the retina that vary significantly in their size, connections, and responses. Some receive information from neurons connected to the rods and cones and pass visual response signals to the brain. Others (the intrinsically photosensitive retinal ganglion cells, ipRGC) are photosensitive and contribute primarily to nonvisual physiological processes and the pupillary light reflex.

NOTE: This term and its definition were changed in ANSI/IES RP-16-17 Addendum 4. Previously called ganglion cells.

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