blepharo-, blephar- +
(Greek: eyelid; of or pertaining to the eyelid[s] or eyelash[es])
This is normal in the newborn of some species, lasting about ten days in puppies and kittens. Delayed separation may occur.
Meibomian glands are sebaceous follicles between the cartilage and conjunctiva of eyelids.
Also known as entropion, it can be a congenital condition. In babies, it rarely causes problems because the lashes are very soft and do not easily damage the cornea. In older people, the condition is usually caused by a spasm and weakening of the muscles surrounding the lower part of the eye, causing the lid to turn inward.
Although rare in North America and Europe, trachoma infection (eye infection caused by bacteria) can cause scarring of the inner side of the lid, which may cause entropion.
Trachoma scarring is one of the three leading causes of blindness in the world. Risk factors for entropion are aging, chemical burn, or prior infection with trachoma.
"Anterior blepharitis affects the outside front of the eyelid, where the eyelashes are attached. The two most common causes of anterior blepharitis are bacteria (Staphylococcus) and scalp dandruff."
"Posterior blepharitis affects the inner eyelid (the moist part that makes contact with the eye) and is caused by problems with the oil (meibomian) glands in this part of the eyelid."
"Two skin disorders can cause this form of blepharitis: rosacea and seborrheic dermatitis of the scalp (scalp dandruff)."