Inner Plexiform Layer

The inner plexiform layer is a layer of the retina which consists of a dense reticulum of fibrils formed by interlaced dendrites of retinal ganglion cells and cells of the inner nuclear layer. Within this reticulum a few branched spongioblasts are sometimes embedded.

Bipolar, amacrine and ganglion cells are linked up and interact in the inner plexiform layer. The axonal endings of bipolar cells bring information from the outer plexiform layer (OPL) to the neuropil of the inner plexiform layer (IPL). Here bipolar cells talk to different varieties of functionally specialized amacrine cells and to dendrites of the various ganglion cells.