Meibum Lipids Lipids are the major components of meibum (also known as<unk>  secretions"). The term "meibum" was originally introduced by Nicolaides et al. in 1981. The biochemical composition of meibum is extremely complex and very different from that of sebum. Lipids are universally recognized as major components of human and animal meibum. An update was published in 2009 on the composition of human meibum and on the structures of various positively identified<unk>  lipids Currently, the most sensitive and informative approach to lipidomic analysis of meibum is mass spectrometry, either with direct infusion or in combination with liquid chromatography. The lipids are the main component of the lipid layer of the tear film, preventing rapid evaporation and it is believed they lower the surface tension help helps to stabilize the tear film. Proteins In humans, more than 90 different proteins have been identified in<unk>  secretions.
Meibomian gland
Serous gland
Areolar gland
Callus
Skene's gland
Subfornical organ
Ciaccio's glands
Cryptocotyle