Coffey B, Wick B, Cotter S, et al.

Treatment options in intermittent exotropia: a critical appraisal.

Optometry and Vision Science, 69: 386-404, 1992. 

Pooled success rates of different treatment regimens for intermittent exotropia reported 59% for vision therapy, 46% for surgery, and 28% for passive therapy such as minus lenses, occlusion, and/or prisms.