Convergence Insufficiency Treatment Trial (CITT)

The purposes of the CITT are: * To determine whether Home-based Pencil Push-up therapy, Home-based Pencil Push-ups with Computer Vision Therapy/Orthoptics or Office-based VT/Orthoptics more effective than placebo treatment, and whether there are differences between the three treatments in improving subject symptoms and signs. * To evaluate whether improvements in outcome measures are still present after one year of observation.