Vision is one of the most specialized of your 5 senses. The eyeball moves as a result of 6 muscles attached around it (2 of these muscles are illustrated below: the lateral rectus and medial rectus muscles).

The annotated structures of the eye are explained in the Table below the illustration.

 
 
 

Anterior chamber	A cavity of the eye filled with aqueous humor, a fluid that provides oxygen, glucose, and proteins
Choroid	Layer rich in blood vessels that supply the eye tissues with oxygen and nutrients
Ciliary body	Changes the shape of the lens, which adjusts the eye's focus
Conjunctiva	Transparent membrane that covers the sclera and lines the insides of the eyelids
Cornea and lens	Focuses light
Fovea	A depression in the retina where cones (photoreceptor cells) are concentrated and vision is most acute.
Iris	Colored part of the eye
Optic disc	Round, flat structure where nerve fibers from the retina converge
Optic nerve	Transmits information about images to the brain
Retina	Contains light-sensitive nerve cells
Sclera	White, outer layer of the eyeball
Vitreous	Transparent gel that fills the main cavity of the eye