PURPOSE: It is still not clear whether inferior oblique recession or inferior oblique myectomy is a better option for weakening inferior oblique overaction (IOOA). The aim of this study was to compare the effect of these two methods on IOOA. METHODS:Patients who were candidates for surgical management of IOOA were randomly assigned to either IO myectomy or recession. Complete ophthalmic examinations were performed before surgery. In the myectomy group, 5 mm was excised from the inferior temporal region of IO muscle(s). In the recession group, the IO muscle was disinserted and subsequently sutured to a point 2 mm lateral and 4 mm posterior to the insertion of the inferior rectus muscle on the temporal side. Satisfactory results were defined as an IO function of grade 0 or 1+ at 3 months postoperatively. RESULTS: The study included 50 patients (82 eyes) with a mean age of 12.3 ± 5.9 years (range: 3 to 32 years). Both methods were effective on the weakening of IOOA (P < .001). The rate of satisfactory results was similar in both groups (P = .686). The rate of residual IOOA and IO underaction did not differ between the two groups. Regarding the changes of horizontal or vertical deviations, V pattern, and dissociated vertical deviation, there was no statistically significant difference between the two groups. CONCLUSION: For treatment of IOOA, both IO myectomy and recession can be used with similar success rate. Copyright 2011, SLACK Incorporated.
RCT Entities:
PURPOSE: It is still not clear whether inferior oblique recession or inferior oblique myectomy is a better option for weakening inferior oblique overaction (IOOA). The aim of this study was to compare the effect of these two methods on IOOA. METHODS:Patients who were candidates for surgical management of IOOA were randomly assigned to either IO myectomy or recession. Complete ophthalmic examinations were performed before surgery. In the myectomy group, 5 mm was excised from the inferior temporal region of IO muscle(s). In the recession group, the IO muscle was disinserted and subsequently sutured to a point 2 mm lateral and 4 mm posterior to the insertion of the inferior rectus muscle on the temporal side. Satisfactory results were defined as an IO function of grade 0 or 1+ at 3 months postoperatively. RESULTS: The study included 50 patients (82 eyes) with a mean age of 12.3 ± 5.9 years (range: 3 to 32 years). Both methods were effective on the weakening of IOOA (P < .001). The rate of satisfactory results was similar in both groups (P = .686). The rate of residual IOOA and IO underaction did not differ between the two groups. Regarding the changes of horizontal or vertical deviations, V pattern, and dissociated vertical deviation, there was no statistically significant difference between the two groups. CONCLUSION: For treatment of IOOA, both IO myectomy and recession can be used with similar success rate. Copyright 2011, SLACK Incorporated.