Meibomian gland scores of the upper and lower eyelid.
MEIBOMIAN GLAND DYSFUNCTION
Grade 0: No loss of Meibomian glands; Grade 1: Loss of Meibomian glands less than one third of the total density on the eyelid; Grade 2: Loss between one and two thirds of the total density of the glands on the eyelid; Grade 3: Loss of glands is greater than two-thirds of the total density of glands on the eyelid; MGD = Meibomian gland dysfunction; CN = cationic nanoemulsion; F6H8 = perfluorohexyloctane.There were no harms observed in either group.