Final answer:
Fibers cross at the optic chiasm, allowing visual information to be processed by the opposite hemisphere of the brain. Damage to this area can result in tunnel vision. Muscles also exhibit a crossing pattern at tendons.
Step-by-step explanation:
Fibers cross at the optic chiasm to the opposite side of the body. This crossing allows for the visual information from the left field of view to be processed by the right hemisphere of the brain and vice versa. This is crucial for the coordination of visual perception.
Patients with certain types of damage to the optic chiasm may experience tunnel vision, which is a condition where peripheral vision is diminished, leaving only the central visual field. While the optic chiasm's primary function deals with vision, the structure and arrangement of muscle fibers at a tendon feed into it at certain angles to optimize the body's biomechanical efficiency, as they feed into it at opposite angles in a similar crossing manner.