What is the primary function of basal tears?

The primary function of basal tears is to lubricate the eye. Basal tears are produced continuously in small amounts by the lacrimal glands to maintain eye moisture and provide a smooth surface on the cornea. This lubrication is essential for comfortable vision and helps to prevent the eyes from feeling dry and irritated.

Basal tears also play a role in nourishing the corneal cells and removing small particles and debris from the surface of the eye. They ensure that the eye has a consistent layer of tears covering it, which is integral for optimal visual clarity and comfort. While other types of tears may serve different functions, such as emotional responses or responses to irritants, the primary and ongoing role of basal tears centers around lubrication.