What is the condition characterized by inflammation of the eyelid margin?

Blepharitis is the condition characterized by inflammation of the eyelid margin. This inflammation can be due to a variety of factors, including seborrheic dermatitis, bacterial infection, or meibomian gland dysfunction. It often presents with symptoms such as redness, swelling, crusting of the eyelashes, and irritation of the eyes. Proper treatment for blepharitis typically involves maintaining good eyelid hygiene, which may include warm compresses and cleansers to reduce inflammation and keep the eyelid margins clear from debris and bacteria.

In contrast, conjunctivitis refers to inflammation of the conjunctiva, not the eyelid margin. GPC, or giant papillary conjunctivitis, is related to the conjunctiva and is often associated with contact lens wear, leading to giant papillae on the inner surface of the eyelids. Keratoconus is a disorder of the cornea, not directly linked to the eyelid margin. These conditions differ significantly from blepharitis in both symptoms and site of inflammation.