Posterior segment
Retinal Pigment Epithelium
- Single layer of cuboidal epithelial cells
- Outermost retinal layer
- Between the choriocapillaris and the photoreceptor outer segments
- 4-6 million RPE cells per eye
- 45:1 photoreceptors:RPE
- Embryologically from the same tissue as the neural retina but differentiates into a secretory epithelium