The posterior chamber of the eye is smaller than the anterior chamber. It extends from the iris to the vitreous body, and it contains the lens. The aqueous humour—which fills both the posterior and anterior chambers—is produced in the ciliary body and serves to nourish the lens and cornea. In addition, it stabilises intraocular pressure and thus the shape of the eye.
The transparent aqueous humour consists of 98% water in which nutrients and oxygen are dissolved. Incidentally, aqueous humour—although transparent rather than red—resembles blood serum. However, it contains no proteins.