To understand the difference between chronic blepharitis, anterior blepharitis, squamous Blepharitis and posterior Blepharitis, let us take a look at them one by one: –
Chronic Blepharitis – It is a non infectious inflammation with an unknown cause. In this type of blepharitis, a gland called meibomian in our eyelids produces altered lipid secretion that causes the evaporation of tears.
Anterior Blepharitis – It is commonly caused by bacteria, eyelash dandruff, or scalp dandruff. If this bacteria is present in excess amount, infection can occur.
Squamous Blepharitis – It is a type of blepharitis that is caused by bacterias such as staphylococcus aureus and staphylococcus epidermidis.
Posterior Blepharitis – This type affects the inner edge of our eyelids which happens when oil glands get clogged.