Outcome of two-muscle surgery for large-angle intermittent exotropia in children

Background/aims To evaluate the surgical outcomes of two-muscle surgery for childhood intermittent exotropia comparing large angles with moderate angles. Methods We retrospectively reviewed the medical records of 178 children who had undergone bilateral lateral rectus recession (BLR) or unilateral recess-resect (RR) for large-angle (≥40 prism dioptres (PD); group A) or moderate-angle (≥20 and Results There was a significant difference in mean angle of deviation at distance throughout the postoperative period (p Conclusions The patients with childhood intermittent exotropia with large angles showed significantly higher rates of undercorrection, though they also showed greater effects of BLR or RR per millimetre (the effect/dose ratio), compared with moderate-angle exotropia.