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Retina Metabolism and Metabolism in the Pigmented Epithelium: A Busy Intersection
Annual Review of Vision Science  (IF6.422),  Pub Date : 2021-09-15, DOI: 10.1146/annurev-vision-100419-115156
James B. Hurley

The outer retina is nourished from the choroid, a capillary bed just inside the sclera. O2, glucose, and other nutrients diffuse out of the choroid and then filter through a monolayer of retinal pigment epithelium (RPE) cells to fuel the retina. Recent studies of energy metabolism have revealed striking differences between retinas and RPE cells in the ways that they extract energy from fuels. The purpose of this review is to suggest and evaluate the hypothesis that the retina and RPE have complementary metabolic roles that make them depend on each other for survival and for their abilities to perform essential and specialized functions.