Which statement describes the direction of superior fibers after crossing the chiasm?

Which statement describes the direction of superior fibers after crossing the chiasm?

• A. Tend to move toward the midline
• B. Tend to move toward the lateral side
• C. Remain in the same position
• D. Move toward the posterior pole

Answer: (A)

After crossing at the optic chiasm, fibers that carry information from the superior retina shift medially as they join the contralateral optic tract. This medial movement places the superior-field information toward the brain’s midline so that each hemisphere receives the opposite visual field. So the direction described is toward the midline. They don’t remain in the same position, nor do they move laterally or toward a posterior pole.