When you blink, a layer of tears—called tear film—covers the eyes' surface. The tear film has these three layers: Meibomian gland dysfunction occurs when the glands on the edge of your eyelids ...

Relevant clinical, functional, and biochemical aspects of the tear film lipid layer are reviewed ... relative humidity inside the chamber 15.6 (3.8) 40 Mathers et al. 57 Humidity sensor enclosed ...