What is convergence insufficiency?

Convergence insufficiency is a condition where the eyes have difficulty working together when focusing on a nearby object. This means that when an individual tries to look at something close, like reading a book, the eyes do not converge properly, making the alignment of the eyes challenging. This can result in symptoms such as blurred vision, double vision, and eye strain, which are all linked to the inability to maintain proper coordination of eye movements for near vision tasks.

The other options describe various visual issues that may be encountered but do not define convergence insufficiency. Difficulty shifting focus at different distances refers to issues with accommodation, which involves the eye's ability to change focus rather than the alignment of the eyes. The inability to see objects in dim light relates to night vision problems, while increased sensitivity to light addresses issues with brightness and glare, not the coordination needed for close-up tasks. Thus, understanding convergence insufficiency specifically involves recognizing the challenges faced when aligning the eyes for near vision.