There are glands along the edges of our eyelids, known as meibomian glands. If these glands work properly, they secrete good oils that stabilise your tear film so that it does not evaporate too fast. If the meibomian glands are inflamed and become clogged, this is known as blepharitis. This inflammation affects the tear film and causes dry eyes.
Symptoms of blepharitis are: swollen, itchy or red eyelids, sticky eyelids, flakes and scabs on the eyelids and eyelashes. With good hygiene of the edges of your eyelids and cleansing, blepharitis can usually be kept under control.