The aqueous layer of the tear film is produced by which glands?

The aqueous layer of the tear film is primarily produced by the lacrimal glands. These glands are located in the upper outer region of each eye and are responsible for secreting the watery component of tears. The aqueous layer plays a critical role in maintaining eye health, providing lubrication, supporting the cornea, and offering protection by delivering nutrients to the ocular surface while helping to flush away debris and potential irritants.

Meibomian glands are associated with the production of the lipid (oil) layer of the tear film, which helps prevent the evaporation of the aqueous layer. Goblet cells are specialized epithelial cells found in the conjunctiva, and they produce mucin, contributing to the mucous layer of the tear film. Sebaceous glands are involved in oil production in various parts of the body, but they do not play a role in tear film production.

Understanding the specific function of each type of gland is essential in comprehending how the different layers of the tear film work together to keep the eye healthy and maintain proper vision.