Final answer:
The inner layer of the tear film is called the conjunctival epithelium, which provides hydration, nutrients, and protection to the corneal epithelium.
Step-by-step explanation:
The inner layer of the tear film is called the conjunctival epithelium, which functions to protect and nourish the corneal epithelium. The tear film itself is a complex structure composed of three layers. The innermost layer, or the mucin layer, is produced by goblet cells in the conjunctiva and by the lacrimal glands. This layer's primary purpose is to hydrate the eye's surface, provide nutrients, and form a barrier to foreign particles and pathogens. Overall, it helps to keep the eye moist and clear, maintaining a healthy state which is essential for proper vision.