occurs in occurs in phenotype affects entity inflammatory response Posterior blepharitis blepharitis abnormal Meibomian gland physiology Meibomian gland inflammation posterior blepharitis MP:0013392 meibomitis local accumulation of fluid, plasma proteins, and leukocytes in the meibum-secreting modified lobulated sebaceous glands located at the rim of the eyelids inside the tarsal plate; chronic Meibomian gland inflammation can lead to a lump in the eyelid known as a Meibomian gland cyst (aka chalazion) meibomianitis tarsal gland tarsal gland physiology phenotype