The sclera is the white outer layer of the eyeball, providing structure and protection. It is made of dense connective tissue and helps maintain the shape of the eye. The sclera is continuous with the cornea, the clear front part of the eye that allows light to enter. In addition to its protective role, the sclera serves as an attachment point for the eye muscles, which control eye movement. It also contains blood vessels and nerves that support the eye's health. The sclera is important for overall vision, working alongside other parts of the eye, such as the retina and lens.