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the double-walled cup formed by the invagination of the embryonic optic vesicle; its inner component becomes the neural layer of the retina and its outer layer becomes the pigmented layer.
A two-walled cuplike depression, formed by invagination of the optic vesicle, that develops into the pigmented and sensory layers of the retina. Also called eyecup.
op·tic cup(op'tik kŭp)
The double-walled cup formed by the invagination of the embryonic optic vesicle; its inner component becomes the neural layer of the retina; its outer layer, the pigmented layer.
1. A double layered cup-shaped structure attached to the forebrain of the embryo by means of a hollow stalk. It develops into the retina and inner layers of the ciliary body and iris. It is formed by the invagination of the outer wall of the optic vesicle. Subsequently, nerve cells develop in its invaginated layer and some of these send their axons back along the hollow stalk (optic stalk or lens stalk) to form the optic nerve. Syn. ocular cup; ophthalmic cup; secondary optic vesicle.