Our understanding of ocular surface health has increased exponentially in recent years, but the growing wealth of knowledge can sometimes be difficult to succinctly apply in the clinic. George Waring IV, MD; Tal Raviv, MD; and Doug Devries, OD, discuss the overarching role of meibomian glands in ocular surface health and pre-surgical measurements, how they impact patients' vision, and how to effectively evaluate the glands. This is the first of three podcasts in this series.