What is the primary function of epithelial cells in the cornea?

The primary function of epithelial cells in the cornea is to form a barrier against pathogens. The corneal epithelium is composed of several layers of epithelial cells that serve as the first line of defense against external threats such as bacteria, viruses, and other environmental irritants. This barrier is essential for maintaining the health and clarity of the cornea, as it helps prevent infections and keeps the underlying tissues protected.

Furthermore, the epithelial cells have specialized junctions that contribute to their barrier function, ensuring that substances cannot pass freely between cells. This is important not only for preventing pathogens from entering the cornea but also for maintaining the integrity of the corneal surface, which is crucial for clear vision. The regeneration capacity of these epithelial cells also plays a vital role in repairing any damage to the cornea to quickly restore its protective functions.