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Discuss about the function of Tear Film in short.
Functions of Tear Film
The normal function of the eye is dependent on sufficient supply of tear fluid- a secretion comprised of aqueous, lipid, and mucus components. The tear film produced by the lacrimal glands smoothens out any irregularities in the cornea and acts as the first interface between air and a liquid medium.
Figure: Tear Volume
The key functions of the tear film are to form and maintain a smooth refractive surface over the cornea, to keep the cornea and conjunctiva moist, to provide oxygen to the conjunctiva and cornea and to flush away foreign bodies.
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