Ivory and glass demonstration model of an eye, comes apart to show various components, on ivory pedestal, Europe, 1801-1900

This ivory and glass model of the eye unscrews to show the different parts, including the cornea (part of the outer coating of the eyeball) the pupil, the iris, the jelly-like vitreous humour that fills most of the eyeball, and the optic nerve that transmits messages to the brain.

The glass lens is concave to mimic the way it bends light entering the eye. The eye is complete with eye lids. The model was almost certainly used to teach medical students about the structure and function of the eye.