Outcome of Inferior and Superior Rectus Recession in Graves’ Orbitopathy Patients

AbstractPurpose: To evaluate the surgical effect of unilateral inferior rectus recession (IR-group) with or without a recession of contralateral superior rectus (IR-SR-group) on squint angle and motility restrictions in Graves’ Orbitopathy (GO) patients.Design: Retrospective case series.Materials and Methods: Primary outcome parameters were the changes of squint angle 3 months and 6–12 months postoperatively. As in a previous study, success was defined as a postoperative vertical squint angle of ≤3° in primary position and on downgaze. Secondary outcome parameters were the influence of surgery on duction range and influence of muscle size on dose-effect response.Results: Fifty-six patients were included in the study; 31 patients in the IR-group and 25 patients in the IR-SR-group. The amount of (fixed suture) recession ranged from 2 mm to 7 mm. Vertical deviations in primary position changed from 8.0° [95% CI 6.6–9.7°] to 1.0° [95% CI −0.4–6.5°] in the IR-group and from 17.0° [95% CI 15.7–20.0°] to 1.5° [9...