The different parts of the eyeball model are detachable to show the following structures.
1. Tunica external: showing cornea and sclera with attachments of ocular muscles and optic nerve.
2. Tunica media: showing the iris, the ciliary body and the chorioid.
3. Tunica internal is retina.
4. Refraction media: showing the lens and the vitreous body.
6 times enlarged. On stand.