Effect of Vergence/Accommodative Therapy on Attention in Chi
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This study aimed to compare the effects of 16 weeks of vergence/accommodative therapy and placebo therapy on changes in attention for children in the Convergence Insufficiency Treatment Trial–Attention and Reading Trial.

310 children 9-14 years old with convergence insufficiency were assigned to receive treatment with office-based vergence/accommodative therapy or placebo therapy. Attention tests were administered at baseline and after 16 weeks of treatment. The primary measure of attention was the Strengths and Weaknesses of Attention-Deficit/Hyperactivity Disorder Symptoms and Normal Behavior (SWAN) scale.

Results:
--For the SWAN, there was no significant difference between the groups for the inattention scale parental report (d = 0.036) or for the hyperactivity impulsivity scale parental report (d = -0.003).

--Similar results were found for teacher reports and the secondary measures.

--There were, however, large within-group changes with d more than 1 in both treatment groups for the SWAN, the Homework Problems Checklist, and the d2 Test of Attention.

These findings indicate that vergence/accommodative therapy does not boost concentration any more than placebo therapy. Each community saw significant changes in inattention, homework completion, and selective and sustained focus. However, these changes are most likely due to nonspecific results of an intensive therapy regimen rather than improvements in vergence and accommodation.

Source: https://journals.lww.com/optvissci/Abstract/2021/03000/Effect_of_Vergence_Accommodative_Therapy_on.8.aspx
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