Eyelids and Adnexa
Glands and Secretions of the Adnexa
The glands of the eyelids and adnexa play a crucial role in maintaining ocular health. Their secretions form the tear film, preventing dryness and protecting the eye from infection.
Eyelids and Adnexa: Glands and Secretions
The adnexa of the eye includes structures that support and protect the eyeball. Among them, various glands play a vital role in maintaining ocular health through their secretions.
Types of Glands in the Eyelids
- Meibomian Glands: Located along the tarsal plates, these sebaceous glands produce meibum, an oily secretion that prevents evaporation of the tear film.
- Zeis Glands: Small sebaceous glands associated with eyelash follicles, they secrete lipids to lubricate the lashes.
- Moll Glands: Modified sweat glands found at the eyelid margins, they contribute to tear film stability.
- Lacrimal Gland: The primary gland responsible for aqueous tear production, vital for hydration and protection of the ocular surface.
Role of Secretions in Ocular Health
Each gland contributes specific components to the tear film, ensuring eye comfort and visual clarity. Dysfunction of these glands can lead to dry eye syndrome or infections such as blepharitis.
Clinical Significance
Understanding the function of adnexal glands helps in diagnosing and treating various ocular conditions. Therapeutic approaches may include artificial tears, warm compresses, or medications to improve glandular function.
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