Blepharitis can involve which portions of the eyelid?

Blepharitis can involve which portions of the eyelid?

• A. Anterior only
• B. Posterior only
• C. None
• D. Both anterior and posterior

Answer: (D)

Blepharitis involves inflammation at the eyelid margins and can affect more than one part of the lid. The front edge, where the lid skin and eyelashes are, is the anterior margin, while the inner edge that faces the globe where the meibomian glands open is the posterior margin. Inflammation can involve either margin, and many patients have involvement of both. That’s why the most accurate statement is that it can involve both anterior and posterior portions. Anterior blepharitis typically shows crusting or scales along the lash line and irritation at the lid margin, often linked to staphylococcal colonization or seborrheic dermatitis. Posterior blepharitis is driven by meibomian gland dysfunction and presents with greasy, frothy tears, lid-margin telangiectasia, and possible conjunctival redness. Understanding that blepharitis can span both margins helps explain why treatments focus on lid hygiene that addresses both anterior lid margin and meibomian gland health.

Blepharitis involves inflammation at the eyelid margins and can affect more than one part of the lid. The front edge, where the lid skin and eyelashes are, is the anterior margin, while the inner edge that faces the globe where the meibomian glands open is the posterior margin. Inflammation can involve either margin, and many patients have involvement of both. That’s why the most accurate statement is that it can involve both anterior and posterior portions. Anterior blepharitis typically shows crusting or scales along the lash line and irritation at the lid margin, often linked to staphylococcal colonization or seborrheic dermatitis. Posterior blepharitis is driven by meibomian gland dysfunction and presents with greasy, frothy tears, lid-margin telangiectasia, and possible conjunctival redness. Understanding that blepharitis can span both margins helps explain why treatments focus on lid hygiene that addresses both anterior lid margin and meibomian gland health.