 Suprachoroid lamina

The choroid consists mainly of a dense capillary plexus, and of small arteries and veins carrying blood to and returning it from this plexus.On its external surface is a thin membrane, the suprachoroid lamina, composed of delicate non-vascular lamellae—each lamella consisting of a network of fine elastic fibers among which are branched pigment cells.During embryological development, it is derived from the neural crest.