Editing Ciliary body (section)

===Aqueous humor===
The ciliary epithelium of the ciliary processes produces [[aqueous humor]], which is responsible for providing oxygen, nutrients, and metabolic waste removal to the lens and the [[cornea]], which do not have their own blood supply. Approximately 80% of aqueous humor production is carried out through active secretion mechanisms (the Na+K+ATPase enzyme creating an osmotic gradient for the passage of water into the posterior chamber) and twenty percent is produced through the ultrafiltration of plasma. [[Intraocular pressure]] affects the rate of ultrafiltration, but not secretion.<ref>{{cite journal |doi=10.1093/bjaceaccp/mkn015 |title=Intraocular pressure |journal=Continuing Education in Anaesthesia, Critical Care & Pain |volume=8 |issue=3 |pages=100–3 |year=2008 |last1=Murgatroyd |first1=H. |last2=Bembridge |first2=J. |doi-access=free }}</ref>