GROSS ANATOMY

Detailed explanation-1: -Cornea and sclera constitute the outer covering or coat of the eyeball. The main purpose of this coat is to protect structures inside the eye. The cornea is a transparent avascular tissue that acts as a structural barrier and protects the eye against infections.

Detailed explanation-2: -Cornea: the transparent circular part of the front of the eyeball. It refracts the light entering the eye onto the lens, which then focuses it onto the retina. The cornea contains no blood vessels and is extremely sensitive to pain.

Detailed explanation-3: -Cornea: The outer, transparent structure at the front of the eye that covers the iris, pupil and anterior chamber; it is the eye’s primary light-focusing structure.

Detailed explanation-4: -The corneas of all animal species remain transparent because of the epithelial barrier, the stromal latticelike arrangement of the collagen fibrils, and the endothelial cells.