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Convergence insufficiency (CI) is a common eye muscle coordination problem. When reading or doing close work, a person’s eyes must turn in (converge) for the words to be clear and single. This usually happens easily, without thinking. In CI, the eyes do not turn in easily and as a result, extra convergence effort must be used to force the eyes to turn in. This additional effort can cause a number of symptoms such as eyestrain, headaches, blurred vision, double vision, difficulty concentrating, loss of place and concentration, and reading slowly. CI has no obvious signs and is only detected through an eye examination.

Virtually all people that have convergence insufficiency have 20/20 vision. However, it is not enough to have 20/20 vision and be able to see clearly. For the visual system to function properly we must use our two eyes together in a very precise and coordinated fashion. This ability is referred to as eye teaming or eye coordination. The technical term for this ability is BINOCULAR VISION.

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  CHILDREN AND CONVERGENCE INSUFFICIENCY
Convergence insufficiency is present in 1 out of every 20 children suggesting that in a typical classroom 1-2 children may have this condition. Studies has demonstrated that children with this problem are likely to experience performance related symptoms....more
  CONVERGENCE INSUFFICIENCY AND ATTENTION DISORDERS
The symptoms of convergence insufficiency can make it difficult for a child to concentrate on extended reading and may overlap with those of ADHD. The recent CITT study showed that 45% of the children with convergence insufficiency reported attention problems. ...more
  EFFECT OF CONVERGENCE INSUFFICIENCY ON EVERYDAY ACTIVITIES
Recent studies that have suggested a possible relationship between CI and Attention Deficit Hyperactivity Disorder (ADHD). Borsting et al argued that the symptoms frequently reported in CI such as loss of concentration when reading or reading slowly are similar to behaviors associated with ADHD (inattentive type), such as, failure to complete assignments and trouble concentrating in class....more
  HOW IS CONVERGENCE INSUFFICIENCY TREATED?
Most eye care professionals treat CI using a home-based therapy called “pencil push-ups.” With his eyes, the child follows a small letter on a pencil as the pencil is moved toward the bridge of his nose. ...more
  SIGNS AND SYMPTOMS OF CONVERGENCE INSUFFICIENCY
Difficulty converging while engaged in a reading task causes misalignment of the eyes results in double vision unless the individual exerts additional convergence effort to re-align the eyes. ...more
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