Structure of the posterior part of the eye: part of the organ of sight comprised principally of the eyelids, the eyelashes, the lachrymal gland and the eyeball.
Retina: eye membrane composed of nerve cells.
Pigment cells: part of the eye containing pigments.
Cones: short, compact visual cells.
Ganglion neurons: nerve cells of the eye.
Rods: long, fine, visual cells.
Interior of the eye: inside of the eyeball.
Optic nerve: conductor of nerve impulses in the eye.
Sheat of optic nerve: envelope containing the nerve related to sight.
Sclera: outermost membrane of the eye.
Choroid: middle membrane of the eye.
Pigmented epithelium: part of the eye containing pigments.