What we know about mucins and their role in protecting the eye from ocular surface
How do you describe a good tear film? Put simply, a good tear film is sticky on the bottom, juicy in the middle and greasy on top. While this may be an oversimplification, it’s also a good way to start a conversation about mucins—a vital component of a healthy ocular surface. Lipid meibum supplies the greasy top surface that reduces aqueous evaporation, lacrimal glands produce the tears that compose the aqueous layer, and the sticky mucins create an intimate layer of protection at the corneal and conjunctival surfaces.