6 times life-size (twice the size of competitors’ models) and dissectible into eight parts, this unbreakable vinyl eyeball sits in its bony socket to provide a better understanding of its relationship with major blood vessels, muscles and nerves. All six muscles of movement can be seen and the upper half of the eyeball with its lacrimal (tear) gland lifts off. Present and extractable are the superior and lateral rectus muscles, the iris and cornea, which can be removed as a unit, the Lucite lens, which actually magnifies and inverts images, and the transparent vitreous body, which exposes the fovea centralis on the retina. The choroid coat, retina, and optic disk can also be seen, as well as a schematic cross section through retinal layers. 77 hand-numbered features are identified in the accompanying key.
This two-part model illustrates the microscopic structure of the retina with choroids and sclera. The left side shows the retina’s complete structure, including the supplying vascular layer and parts of the sclera from a light microscopic view. The model’s right side is even more enlarged, and contains a sec-tion of the microscopic structure of the photorecep-tors and the cells of the pigmented layer.