part of uvea optic choroid choroid optic choroid posterior uvea eye choroid choroidea choroidea Vascular layer containing connective tissue, of the eye lying between the retina and the sclera. The choroid provides oxygen and nourishment to the outer layers of the retina. Along with the ciliary body and iris, the choroid forms the uveal tract[WP]. chorioid choroid coat vasculature of eye anterior uvea chorioretinal region