Model of human eye, France, 1870
The top plaster layer represents the sclera; at the front of the eye this becomes the cornea. The second layer, made from glass, shows the iris, pupil and surrounding area. The glass bulb represents the lens. The vitreous humour is behind the lens. The optic nerve is shown at the back of the model. It was made by the factory of French physician Louis Thomas Jérôme Auzoux (1797-1880), and was probably used to demonstrate the anatomy of the eye to medical students. Seeing body parts on a larger scale, rather than life size, makes the structure easier to understand. There are small numbers placed on different parts of the eye, suggesting that there was once a key to help in learning the names and shapes of the various parts.
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The organ of sight or vision. In man, and vertebrates generally, it is properly the movable ball or globe in the orbit, but the term often includes the adjacent parts.
Glossary: teaching aid
A tool used by teachers, facilitators, or tutors to help learners improve reading and other skills,or to illustrate or reinforce a skill, fact, or idea. They can often combat anxiety or boredom, as many teaching aids are like games.
The white fibrous outer layer of the eyeball. It covers approximately the five sixths of its surface and continuous anteriorly with the cornea and posteriorly with the external sheath of the optic nerve.
Glossary: anatomical model
A model that demonstrates the structure of the human body through the separation of its parts. Often used for teaching purposes.
A branch of medical science concerned with the structure of living organisms.
The transparent part of the eyeball that covers the iris and pupil. It refracts light entering the eye on to the lens, which is then focused on to the retina.