Chambers and Fluids
Fluids in each eye segment
Most of the interior of the eye is taken up by its two fluid-filled cavities: the anterior segment and the posterior segment of the eye.
These chambers are filled with fluids, or humors, that play a vital role in maintaining ocular function. These fluids are called the aqueous humor and vitreous, respectively.
The anterior segment (space between the cornea and lens) is divided in two by the pupil (aperture of the iris), creating the anterior chamber and the posterior chamber.
Aqueous humor, produced by the ciliary processes, enters the posterior chamber and flows through the pupil into the anterior chamber, where it drains out into a network of tiny blood vessels that surround the eye.
The vitreous body (space between the lens and retina) is filled with vitreous, a clear gel made up of small fibers and water and permanently formed at birth. Vitreous does not undergo a regular formation and drainage process as does the aqueous humor.