What is the purpose of the lacrimal glands?

The purpose of the lacrimal glands is primarily associated with the production of tears, which plays a crucial role in maintaining the health and function of the eyes. Reflex tear production is a key function of the lacrimal glands, as they respond to irritants such as dust, smoke, or onions, leading to increased tear secretion. This reflexive action helps to flush out foreign particles, providing a protective mechanism for the eyes. Additionally, tears produced by the lacrimal glands serve to lubricate the eye surface, providing comfort and preventing dryness. They also contain antimicrobial components that help to protect the eyes from infections, contributing to overall eye health.

The other options do not accurately reflect the primary role of the lacrimal glands. For example, the production of structural proteins for the lens is not a function associated with lacrimal glands; this process involves the lens fibers within the eye. The maintenance of eye shape is largely concerned with the vitreous body and surrounding structures, rather than with lacrimal function. Lastly, while tears do provide some protection against harsh environmental factors, the specific role of the lacrimal glands is focused on tear production rather than active UV protection.