What role does the sclera play in the anatomy of the eye?

The sclera is the tough, white outer layer of the eyeball and serves a crucial role in protecting the inner structures of the eye and maintaining its shape. This protective covering provides strength and support, preventing damage to more delicate areas such as the retina and the lens. The sclera also serves as an attachment point for the extraocular muscles, which are responsible for eye movement.

While the regulation of light entry is primarily managed by the cornea and the lens, and focusing light on the retina is the role of the lens, the sclera does not directly contribute to these functions. Instead, its primary role is structural integrity and protection, making it an essential component of the eyeball's anatomy.