What is the primary source of moisture in the eye?

The primary source of moisture in the eye is indeed the lacrimal glands. These glands are responsible for producing tears, which play a crucial role in keeping the eye surface lubricated, maintaining proper hydration of the cornea, and providing a protective barrier against environmental irritants and potential infections. Tears also contain enzymes and other substances that contribute to the overall health of the eye.

While the conjunctiva contributes to moisture by helping spread tears across the eye's surface, it does not independently produce the moisture itself. Corneal cells can absorb moisture from the tear film, but they do not generate tears. The pupil, on the other hand, is simply an opening that regulates the amount of light entering the eye and is not involved in the production or maintenance of eye moisture. Thus, the lacrimal glands are essential in ensuring that the eye remains adequately moist for optimal function and comfort.