Horizontal Incornitancy After Monocular Recession-Resection Surgery

ABSTRACT

Horizontal incomitancy is a difference of deviation angle between right and left gaze and monocular recession-resection operation may cause horizontal incomitancy. We reviewed 85 patients of intermittent exotropia without oblique dysfunction and vertical deviation who underwent monocular recession-resection operation. The preoperative horizontal in comitancy was 1.0 delta in average with a range of 0 delta to 5 delta. The postoperative horizontal incomitancy after 7 months (mean) was 4.8 delta in average with a range of 0 delta to 17 delta. The postoperative remained deviation and horizontal incomitancy were significanty smaller in the group of patients who had fusion with worth 4-dot test (pPatient's age at operation, the amount of preoperative deviation and the amount of surgery performed did not significantly contribute to the decrease of postoperative horizontal incomitancy.