Which statement most accurately describes convergence insufficiency in relation to divergence insufficiency?

• A. Convergence insufficiency is more common than divergence insufficiency
• B. Divergence insufficiency is more common than convergence insufficiency
• C. They are equally common
• D. Divergence insufficiency is never observed in practice

Answer: (A)

The question hinges on how often these two binocular vision conditions appear in practice. Convergence insufficiency is a fairly common finding, especially in children and young adults who report near-work discomfort like eye strain or headaches while reading. The key feature is insufficient convergence at near, often with eyes drifting outward when focusing up close and reduced near fusional vergence. Divergence insufficiency, on the other hand, is much less common and can present with a noticeable exophoria at distance that may be more pronounced than at near; it is sometimes associated with underlying neurologic or orbital issues. Because divergence insufficiency is relatively rare in routine clinical settings, the statement that convergence insufficiency is more common aligns with typical prevalence. The other options imply equal prevalence or that divergence insufficiency is never seen, which isn’t true.