Abstract
One of the major constituents of the tear film is an aqueous fluid. It has been estimated that the cornea and conjunctiva produce up to about 20% of this fluid and that the main and accessory lacrimal glands supply the rest. The details of the mechanisms that move water across the secretory epithelium of the lacrimal glands are not well understood and neither are the ways by which these mechanisms are controlled. In this paper, we have attempted to pull together what is known about lacrimal gland fluid flow and to present a model, derived in part from our work on the cornea that suggests mechanisms responsible for water movement across the epithelium.
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