title: Tear film physiology.
mesh_terms: D001767:Blinking; D003315:Cornea / Q000502:physiology*; D005141:Eyelid Diseases / Q000150:complications; D006801:Humans; D007765:Lacrimal Apparatus / Q000502:physiology; D007766:Lacrimal Apparatus Diseases / Q000503:physiopathology; D008055:Lipids / Q000172:deficiency; D009077:Mucins / Q000172:deficiency; D013666:Tears / Q000502:physiology*; D014985:Xerophthalmia / Q000209:etiology
chemical_list: D008055:Lipids; D009077:Mucins