Title: L’Oeil
Translated Title: 
The Eye
The eye receives light waves and presents to us the shape, size, and color of objects. The eye is set in the eye socket; it is protected by the eyebrows, eyelids, eyelashes, and conjunctiva. (Eyeball. Eye socket. Fatty tissue. Eyelids. Eyelashes. Conjunctiva.) The eyeball can be completely covered by the eyelids. Look at the right eye: eyebrows, eyelids, eyelashes and the internal corner of the eyelids near the nose. In this corner, you can see a fold of the conjunctiva. (This fold is greatly developed in the eye of the horse; it forms a supplementary eyelid in birds.) Look at the left eye: you can see the white of the eye, the iris, and the pupil. Six small muscles account for the eye's movement. Schematic sectional of the eye. The membranes of the eye. The white of the eye (sclera) is a resistant and fibrous membrane. The iris (extension of the choroid) is a diaphragm: it dilates and contracts. The retina, blossoming from the optic nerve, lines the back of the eye. In a large cut eye, see how one can remove the retina (eye of a steer). Here is the retina floating in water. Schematic sectional of the eye. The transparent media. A good camera uses three lenses. In the same way, the eye is composed of three lenses: the transparent cornea and aqueous humor, the crystalline lens, and the vitreous humor. Here is the crystalline lens removed from the eye of a steer. It is a very pure and delicate lens. See how the crystalline lens leaks on the tissue it is placed on. See the films: Vision I and II