Final answer:
The fibrous tunic of the eye includes the sclera and the cornea, with the sclera providing structural support and the cornea allowing light entry and focus.
Step-by-step explanation:
The fibrous tunic is the outer layer of the eye and consists primarily of two sections: the sclera and the cornea. The sclera is the opaque, white component that makes up the majority of the eye's surface, providing the eye with structure and protection. The cornea, on the other hand, is the clear, transparent part that covers the front of the eye and permits light to enter, playing a critical role in focusing visual images.