Which condition is characterized by crusty and greasy eyelids?

Blepharitis is a common condition characterized by inflammation of the eyelids, which often leads to crusty and greasy eyelids. This condition can result from various factors, including seborrheic dermatitis, staphylococcal infection, or blocked oil glands. Patients with blepharitis commonly report symptoms such as irritation, redness, and a sensation of grittiness or burning in the eyes. The greasy appearance of the eyelids is primarily due to the excessive oil and debris that accumulate along the eyelid margins.

In contrast, a chalazion is a blockage of an oil gland in the eyelid that can lead to a firm, painless lump but does not typically cause crustiness or greasiness. A hordelum, or stye, is an acute infection usually involving a hair follicle that results in a painful, red bump on the eyelid, also not characterized by crusty eyelids. Conjunctivitis, commonly referred to as pink eye, involves inflammation of the conjunctiva, which primarily presents with redness, discharge, and itchy eyes, rather than the crusty and greasy eyelids typically seen in blepharitis.