Result Comparison after Reoperation in Recurrent Exotropia According to the Type of First Operation

PURPOSE: To investigate and compare the clinical courses and surgical success rates of secondary operations in recurrent exotropia according to the type of first operation for correction of exotropia. METHODS: A retrospective chart review was performed for all patients with recurrent exotropia of the basic or pseudodivergence excess types. In group A (36 patients), bilateral lateral rectus (LR) recession was performed as the first operation and uni- or bilateral medial rectus (MR) resection was performed as the second operation. In group B (19 patients), unilateral LR recession-MR resection (R&R) was performed as the first operation and LR recession or R&R in contralateral eye as the second operation. RESULTS: There were no significant differences between the 2 groups when considering age at each operation, frequency of the amblyopia, prescription of prism, time interval for recurrence and reoperation and the final and cumulative success rates. No postoperative complications were observed in either group. The mean number of used muscles for the first and second operation was 3.9 +/- 0.4 in group A, and 3.4 +/- 0.5 in group B (p = 0.001). Mean time interval for occurrence of postoperative orthophoria was 3.7 +/- 6.2 months in group A and 6.5 +/- 16.2 in group B (p = 0.047). In group B, the incidence of esodeviation tended to increase after postoperative 1 month. CONCLUSIONS: The final success rates of reoperation between the 2 types of the first operation in recurrent exotropia were similar. Mean time between postoperative overcorrection of orthophoria was shorter in the group with bilateral LR recession followed by secondary MR resection than in the other group. Unilateral R&R followed by LR recession or R&R in contralateral eye may be more helpful to decrease the number of used muscles than in the bilateral LR recession followed by secondary MR resection.

Result Comparison after Reoperation in Recurrent Exotropia According to the Type of First Operation

PURPOSE: To investigate and compare the clinical courses and surgical success rates of secondary operations in recurrent exotropia according to the type of first operation for correction of exotropia. METHODS: A retrospective chart review was performed for all patients with recurrent exotropia of the basic or pseudodivergence excess types. In group A (36 patients), bilateral lateral rectus (LR) recession was performed as the first operation and uni- or bilateral medial rectus (MR) resection was performed as the second operation. In group B (19 patients), unilateral LR recession-MR resection (R&R) was performed as the first operation and LR recession or R&R in contralateral eye as the second operation. RESULTS: There were no significant differences between the 2 groups when considering age at each operation, frequency of the amblyopia, prescription of prism, time interval for recurrence and reoperation and the final and cumulative success rates. No postoperative complications were observed in either group. The mean number of used muscles for the first and second operation was 3.9 +/- 0.4 in group A, and 3.4 +/- 0.5 in group B (p = 0.001). Mean time interval for occurrence of postoperative orthophoria was 3.7 +/- 6.2 months in group A and 6.5 +/- 16.2 in group B (p = 0.047). In group B, the incidence of esodeviation tended to increase after postoperative 1 month. CONCLUSIONS: The final success rates of reoperation between the 2 types of the first operation in recurrent exotropia were similar. Mean time between postoperative overcorrection of orthophoria was shorter in the group with bilateral LR recession followed by secondary MR resection than in the other group. Unilateral R&R followed by LR recession or R&R in contralateral eye may be more helpful to decrease the number of used muscles than in the bilateral LR recession followed by secondary MR resection.

The Effect of Lateral Rectus Muscle Advancement in Consecutive Esotropia After Bilateral Rectus Muscle Recession

PURPOSE: To investigate the clinical outcomes of unilateral lateral rectus muscle advancement in patients with consecutive esotropia after bilateral lateral rectus muscle recession. METHODS: We investigated the results of 13 patients who underwent unilateral lateral rectus muscle advancement for consecutive esotropia after bilateral lateral rectus muscle recession. We evaluated the amount of deviation, changes of angle deviation, corrected amount/mm, and sensory status after each surgery. RESULTS: The average angle deviation of exotropia was 30.42+/-5.41PD, and the average amount of bilateral lateral rectus muscle recession was 6.73+/-0.59 mm. The average angle deviation of esotropia one day after the surgery was 13.17+/-5.15PD. Occlusion treatment was performed during follow-up. The surgery for consecutive esotropia was performed after an average of 12.0+/-7.25 months of follow-up. In Worth-4-dot tests, 12 patients showed diplopia, and 1 patient showed suppression after the surgery for exotropia. Nine patients showed diplopia, and 4 patients showed suppression just before the surgery for consecutive esotropia. One patient showed mild limitation of motion of the lateral rectus muscle (-1 degree). The average angle deviation before the surgery for consecutive esotropia was 19.42+/-4.20PD. An average of 6.73+/-0.79 mm of unilateral lateral rectus muscle advancement was performed. After surgery, the average angle deviation was 1.25+/-2.73PD esodeviation, and 1.42+/-4.44PD exodeviation after 6 months. In Worth-4-dot tests, 6 patients showed fusion, 2 patients showed diplopia, and 5 patients showed suppression after surgery for consecutive esotropia. CONCLUSIONS: Unilateral lateral rectus muscle advancement was an effective procedure for patients with consecutive esotropia under 25PD who did not show any limitation of motion after bilateral lateral rectus recession.