Kalazion.. say Kalazion.. (pronouce) Meibomitis is involving is most of the ducts. Single gland issue is Chalazion and that can become Internal Hordelolum. Playlist ru-vid.com/group/PLKKWBex6QaMAwgECJE-IZMKxGZXv_CYcP
I still don't understand the difference between meibomitis/ posterior blepharitis and 'kalazion'/ chalazion/ tarsal or meibomian cyst? Anyways both are inflammation of meibomian gland.