The cornea receives nutrients primarily from which sources?

The cornea relies on multiple sources for its nutrient supply, primarily obtaining essential nutrients and oxygen from the aqueous humor, tears, and limbal blood vessels.

The aqueous humor, produced by the ciliary body, flows into the anterior chamber of the eye, providing nutrients and maintaining intraocular pressure, vital for corneal health. The cornea does not have its own blood supply; therefore, it relies on this fluid for nutrients.

Tears, on the other hand, contribute moisture, nutrients, and lubricants that keep the corneal surface healthy and free from infections. They play an essential role in maintaining corneal transparency and overall eye health.

Lastly, the limbal blood vessels are located at the periphery of the cornea and help supply oxygen and other nutrients to the epithelium and stroma, particularly during the healing process.

In combination, these three sources work together to nourish the cornea, making them critical for its function and health. The integration of these nutrients from each source ensures the cornea remains transparent and able to refract light effectively.