Tear sac

Tear Sac

The Tear Sac, also known as the Lacrimal Sac, is an integral part of the human eye's lacrimal system, which is responsible for the production, distribution, and drainage of tears. The tear sac is located in the inner corner of the eye, sitting in a groove formed by the lacrimal bone and the frontal process of the maxilla.

Anatomy

The tear sac is a small, elongated structure that is approximately 12 to 15 mm in length. It is divided into two parts: the superior part, or the fundus, and the inferior part, or the body. The fundus is located above the level of the lacrimal duct, while the body is located below it.

The tear sac is connected to the lacrimal canaliculi, which drain tears from the eye's surface into the sac. From the tear sac, tears are then drained into the nasolacrimal duct, which empties into the nasal cavity.

Function

The primary function of the tear sac is to collect and drain tears produced by the lacrimal gland. This process helps to keep the surface of the eye moist and lubricated, which is essential for maintaining eye health and clear vision.

In addition to its role in tear drainage, the tear sac also plays a role in the immune defense of the eye. The mucous membrane lining the tear sac contains immune cells that help to protect the eye from infection.

Clinical Significance

Diseases and conditions that can affect the tear sac include Dacryocystitis, which is an infection of the tear sac, and Dacryocystocele, which is a swelling of the tear sac. These conditions can cause symptoms such as tearing, eye discharge, redness, and pain.

Treatment for tear sac disorders may include antibiotics for infections, surgery to correct structural abnormalities, or tear duct probing for blockages.

See Also

• Lacrimal apparatus
• Lacrimal gland
• Lacrimal canaliculi
• Nasolacrimal duct