The main lacrimal glands produce about 95% of the aqueous component of tears and the accessory
Lacrimal glands of Krause and the Wolforing produce the remainder. Secretion of tears has basic
(resting) and much greater reflex components. Reflex secretion occurs in response to corneal and conjunctival sensory stimulation, tear break-up and dry spot formation or ocular inflammation.
it is reduced by topical anaesthesia . Although in the past basic secretion was ascribed to the accessory lacrimal glands, it is now thought that the whole mass of lacrimal tissue responds as one unit. The precorneal tear film consists of three layers:
(1) lipid
(2)aqueous
(3) mucin
Each of this have separate functions.
