Uberon definition : 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].;
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].