function of meibomian gland
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Meibomian glands are oil glands along the edge of the eyelids where the eyelashes are found. These glands make oil that is an important part of the eye's tears. The oily layer is the outside of the tear film that keeps tears from drying up too quickly.
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Secretions from these glands protect the eyelid surface, while the glands of Meibum, positioned between the lashes and the bulbar conjunctiva, exude a fat and oil mixture onto the ocular surface. There are approximately 20 to 30 meibomian glands on the lower lid and 40 to 50 on the upper lid.
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