NCIt definition : A blood vessel-containing membrane of the eye that lies between the retina and the
sclera.;
Alternative definition : CDISC: A blood vessel-containing membrane of the eye that lies between the retina
and the sclera. (NCI); NCI-GLOSS: A thin layer of tissue that is part of the middle layer of the wall of
the eye, between the sclera (white outer layer of the eye) and the retina (the inner
layer of nerve tissue at the back of the eye). The choriod is filled with blood vessels
that bring oxygen and nutrients to the eye.; UBERON: 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].;