The model provides the opportunity to ease patient uncertainty with a demonstration. The model also shows a cross section of the eye in three layers: the retina, choroid, and sclera with veins and arteries, including the central retinal artery and vein. It is made of plastic, measures 3.75 inches in diameter, and is mounted on a larger white, opaque plastic base. It is realistically colored and textured. The cornea, optic nerve, and insertion of muscle are shown.