Effects of vision therapy on near exodeviation in children with convergence insufficiency treated during the convergence insufficiency treatment trials

Purpose To report the change in the magnitude of near exodeviation in children with symptomatic convergence insufficiency successfully treated with office‐based vergence/accommodative therapy in the Convergence Insufficiency Treatment Trial–Attention and Reading Trial. Methods A total of 131 children 9–14 years of age with symptomatic convergence insufficiency classified as successfully treated with office‐based vergence/accommodative therapy at the 16‐week outcome visit were included. Masked examiners measured the near ocular deviation by the prism and alternate cover test at baseline, primary outcome and 1‐year post‐treatment. The mean change in near deviation was calculated from baseline to primary outcome, from primary outcome to 1‐year post‐treatment and from baseline to 1‐year post‐treatment. Results Of the 131 participants successfully treated with vergence/accommodative therapy, 120 completed the 1‐year post‐treatment visit. A significant change in near exodeviation was observed at baseline to primary outcome (2.6Δ less exo, p