Ion transport mechanisms in the formation of aqueous humor

Chi Ho To, Chi Wai Do

Research output: Journal article publicationJournal articleAcademic researchpeer-review


The aqueous humor dynamics of the eye are frequently associated with the vision-threatening disease, glaucoma. Pharmacological treatment for glaucoma generally aims to lower the intraocular pressure by reducing aqueous humor formation. Although the aqueous humor is believed to be actively secreted by the ciliary epithelium, the mechanism is still poorly understood. Many studies have been carried out in the last 40 years to unravel the underlying ionic mechanisms that drive aqueous humor formation. This review briefly surveys the ion transports in the ciliary epithelium, such as the possible roles of sodium, chloride and bicarbonate ions as the driving forces. It also examines the current ionic models for aqueous humor formation and its regulation from a cellular transport perspective.
Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalHong Kong Journal of Ophthalmology
Issue number1
Publication statusPublished - 1 Dec 1998


  • Ciliary epithelium
  • Ion transport
  • Aqueous humor formation


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