Gallaway M, Scheiman M.

The efficacy of vision therapy for convergence excess.

Journal of the American Optometric Association, February; 68(2): 81-86, 1997. 

The records of 83 consecutive patients with convergence excess who were treated with vision therapy were reviewed to assess the impact of treatment on clinical findings and patient symptoms. RESULTS: Total elimination of symptoms in 84% of patients with the following improvements: mean divergence amplitude from 8 PD to 16 PD, recovery value from 2 PD to 10 PD, and accommodative facility from 1.5 cpm. to 8cpm. CONCLUSIONS: Vision therapy was successful in enhancing negative fusional vergence and eliminating symptoms in the vast majority of patients with convergence excess and should be considered an effective treatment for this condition.