In infancy, divergence develops before convergence. True or false?

In infancy, divergence develops before convergence. True or false?

• A. True
• B. False
• C. Not determinable
• D. Irrelevant

Answer: (A)

In infancy, the development of binocular coordination starts with vergence movements, where divergence (eyes turn outward) and convergence (eyes turn inward) are controlled by distinct neural pathways. The outward movements rely on basic, early-developing oculomotor circuits and reflexes, so a divergent capability tends to appear earlier. Convergence, on the other hand, depends on the maturation of the accommodation–vergence link and more refined fusional mechanisms needed to maintain single vision at near; this system takes longer to mature. As a result, divergence is established before convergence in typical development, making the statement true.

In infancy, the development of binocular coordination starts with vergence movements, where divergence (eyes turn outward) and convergence (eyes turn inward) are controlled by distinct neural pathways. The outward movements rely on basic, early-developing oculomotor circuits and reflexes, so a divergent capability tends to appear earlier. Convergence, on the other hand, depends on the maturation of the accommodation–vergence link and more refined fusional mechanisms needed to maintain single vision at near; this system takes longer to mature. As a result, divergence is established before convergence in typical development, making the statement true.