Which layer of the cornea contains squamous, wing, and basal cells?

The correct answer is the epithelium. The epithelium is the outermost layer of the cornea and consists of several types of cells, including squamous, wing (or transitional), and basal cells.

Squamous cells are flat and form the surface of the corneal epithelium, providing a protective barrier. Wing cells are located just beneath the surface and help to maintain the structural integrity of the cornea while also playing a role in cellular turnover. Basal cells, which are the deepest layer of cells in the epithelium, are responsible for the regeneration and repair of the corneal epithelium due to their ability to divide and differentiate into the other types of epithelial cells.

Other layers like the endothelium, stroma, and Bowman's layer do not contain these specific types of cells. The endothelium is a single layer of flat cells that helps regulate fluid within the cornea. The stroma is the thickest layer of the cornea and is made up predominantly of collagen fibers. Bowman's layer is a thin layer situated between the epithelium and stroma that provides structural support but does not contain the cell types associated with the epithelium.