What function do the Meibomian glands primarily serve?

The Meibomian glands play a crucial role in the health and function of the eye by secreting oil, also known as meibum. This oil is fundamental for the formation and stabilization of the tear film that covers the surface of the eye. The lipid layer produced by these glands helps reduce evaporation of the aqueous layer of tears, thereby maintaining moisture and comfort in the eyes. This oily secretion prevents the tears from evaporating too quickly, ensuring that the eyes remain lubricated and protected.

While other components of the tear film, such as the aqueous and mucin layers, serve distinct functions—like providing hydration and facilitating dispersion across the eye—the specific function of the Meibomian glands centers around oil secretion. This is essential to prevent dry eye conditions and promote overall ocular health.