What is the four layers of the cornea?

The cornea consists of four primary layers: the epithelium, Bowman's layer, the stroma, and the endothelium. The epithelium is the outermost layer, providing a protective barrier and facilitating nutrient absorption. Bowman's layer is a thin, tough layer that adds structural support. The stroma, the thickest layer, contains collagen fibers that maintain corneal shape and transparency, while the endothelium, the innermost layer, regulates fluid balance to keep the cornea clear.