Lacrimal caruncle

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== Lacrimal Caruncle ==

The lacrimal caruncle is a small, pink, globular nodule at the inner corner (the medial canthus) of the eye. It is made up of skin covering sebaceous and sweat glands. The lacrimal caruncle is part of the lacrimal apparatus, which is responsible for the production and drainage of tears.

Anatomy

The lacrimal caruncle is located in the medial canthus of the eye, adjacent to the plica semilunaris. It is composed of non-keratinized stratified squamous epithelium, which is similar to the conjunctiva that covers the white part of the eye (the sclera). Beneath the epithelium, the lacrimal caruncle contains sebaceous glands, sweat glands, and accessory lacrimal tissue.

Function

The primary function of the lacrimal caruncle is to contribute to the tear film and help maintain the health of the eye's surface. The sebaceous glands within the lacrimal caruncle secrete an oily substance that helps to prevent the evaporation of the tear film. The sweat glands contribute to the aqueous layer of the tear film.

Clinical Significance

The lacrimal caruncle can be involved in various medical conditions. Inflammation of the lacrimal caruncle, known as carunculitis, can cause redness, swelling, and discomfort. Tumors, both benign and malignant, can also develop in the lacrimal caruncle, although they are relatively rare.

Related Structures

• Lacrimal gland
• Lacrimal sac
• Nasolacrimal duct
• Plica semilunaris
• Conjunctiva
• Sclera

See Also

• Tear film
• Dry eye syndrome
• Blepharitis
• Conjunctivitis