[54] Unilateral lateral rectus muscle recession has been shown to be an effective surgery for moderate-angle exotropia of 15 to 25 PD. [55] In patients with amblyopia of 20/50 or worse, monocular ...

Deterioration to constant exotropia, with or without treatment, is rare. Surgery appears effective in improving angle of X(T) and NCS, but rates of overcorrection are high.