Pigment epithelium

Pigment epithelium is a layer of cells at the boundary between the retina and the choroid of the human eye that nourish neurons with the retina.

  • Pigment epithelium is firmly attached to the underlying choroid on one side but less firmly connected to retinal visual cells on the other. The choroid is the layer of connective tissue that supports the retina.

https://en.wikipedia.org/wiki/Retinal_pigment_epithelium