AP PSYCHOLOGY

Detailed explanation-1: -What is the sclera? The sclera, or white of the eye, is a protective covering that wraps over most of the eyeball. It extends from the cornea in the front to the optic nerve in the back.

Detailed explanation-2: -Sclera: The outermost layer of the eye is referred to as the sclera. It is a tough white layer of the eye. It protects and shapes the eye.

Detailed explanation-3: -The first layer, the epithelium, is a layer of cells covering the cornea. It absorbs nutrients and oxygen from tears and conveys it to the rest of the cornea. It contains free nerve endings. It also prevents foreign matter from entering the eye.

Detailed explanation-4: -The surface of the eye and the inner surface of the eyelids are covered with a clear membrane called the conjunctiva. The layers of the tear film keep the front of the eye lubricated. Tears lubricate the eye and are made up of three layers. These three layers together are called the tear film.