Show:

1. The shape of eyeball: eyeball analogs spheroid. The outside of eyeball wall has six pieces of intraocular muscles end surface showing superior, inferior, inner and outside straight muscles and superior and inferior oblique muscles whose function is that make eyeball turn all sides. The rear of eyeball shows optic nerve and the inner of eyeball shows artery and vein of the center of retina. Sclera shows vortices veins, which dived into four bars. Two bars are over eyeball, and two others are behind eyeball. Four bars act as the two sides of straight muscles. There are teriae ciliares posteriors longae, short posterior ciliary arteries and ciliary’s nerve on the periphery of optic nerve.

2. Inner structure of eyeball wall: it have three layer membranes: adventitia, mid membranes, internal mucous.
Six times than the general eyeball.

3.The refractive system of eyeball consists of cornea, aqueous humor, lens and vitreous body.

Maintenance   

1. During the use, the model can set on the bracket. When the teacher professes to the students, the model can disassemble to observe the three layer of the wall of eyeball (The model makes the centre horizontal plane section extremely through the eyeball around.). In the eyeball, the lens, vitreous body and iris also can disassemble. 

2. Disassembling or assembling the model notice the bolt.

3. If the model have spoilt and split, we can use glue glues.