Which statement about blepharitis is true?

• A. The two main types are Staphylococcal and Seborrheic
• B. Staph blepharitis can only cause anterior blepharitis
• C. Seborrheic blepharitis is associated with a dry, scaly appearance
• D. Seborrheic blepharitis never causes madarosis

Answer: (D)

Blepharitis is inflammation of the eyelid margin and is categorized into anterior and posterior forms. Anterior blepharitis can be due to Staphylococcus or seborrheic dermatitis, while posterior blepharitis mainly stems from meibomian gland dysfunction. Seborrheic blepharitis presents with greasy, yellow scales along the lash line, and lash (madarosis) loss is not a typical feature of this type. Madarosis is more commonly associated with chronic anterior blepharitis from staphylococcal infection or related inflammatory eyelid diseases. So, the statement that seborrheic blepharitis never causes madarosis is the true one. The other options are not correct because they misstate the spectrum of blepharitis types, its typical lash changes, or its classic presentation.