Pars palpebralis

Pars palpebralis is a term used in anatomy to refer to the portion of the lacrimal gland that is located within the eyelid, or palpebra. The lacrimal gland is responsible for producing tears, which are essential for maintaining the health of the eye's surface and for providing clear vision.

Structure

The pars palpebralis is a smaller portion of the lacrimal gland, which is divided into two parts: the larger Pars orbitalis and the smaller pars palpebralis. The pars palpebralis is located within the upper eyelid, while the pars orbitalis is located in the orbit, above the eyeball.

The lacrimal gland, including the pars palpebralis, is made up of secretory acini that are grouped together into lobules. These acini produce the aqueous layer of the tear film, which is essential for maintaining the health of the eye's surface and for providing clear vision.

Function

The primary function of the pars palpebralis, as part of the lacrimal gland, is to produce and secrete tears. These tears are spread across the surface of the eye every time we blink, providing moisture and nutrients to the cornea and conjunctiva.

In addition to providing moisture and nutrients, the tears produced by the pars palpebralis also serve to protect the eye from foreign bodies and infections. They contain lysozyme, an enzyme that destroys bacteria, and immunoglobulins, which help to fight against infections.

Clinical significance

Dysfunction or disease of the lacrimal gland, including the pars palpebralis, can lead to dry eye syndrome, a common condition that can cause discomfort, blurred vision, and other complications. Treatment for dry eye syndrome often involves artificial tears, medications to reduce inflammation, or surgery in severe cases.

See also

• Lacrimal gland
• Pars orbitalis
• Tear film
• Dry eye syndrome