Comparison of Anchored Hang_Back with Conventional Hang_Back in Bilateral Lateral Rectus Recession in Exotropic Patients

Reza Nabie

Purpose: To compare the results of CHBT and AHBT of bilateral lateral rectus recession in patients with exotropia.

Methods: In a randomized clinical study, 60 patients underwent CHBT (group 1) and AHBT (group 2) of lateral recti (30 patients in each group).The analyzed data were preoperative and postoperative deviation, age, sex, the amount of recession, complications and duration of follow up.

Results: Mean age was (3-42 years) and (3-42 years) in group 1 and 2, respectively. The mean preoperative distance and near deviation in group one were 35±7.0 PD and 34.6±6.8 PD, and in group two were 34.6±7.1 PD and 33.3 ± 7.7 PD, respectively. The mean postoperative deviation at near and distance were 8 ± 9.4 PD and 7.2±9.1 PD in group one and 8.7± 7.8 PD and 8.1 ±7.5 PD in group two, respectively (P=0.48 and 0.98 for distance and near). In final follow up, 63.3% in group one and 60% in group two were within 10 PD of orthophoria. Serious complications such as globe perforation, A and V patterns and vertical deviations,were not seen. There aren't any statistically significant difference between two groups in success rate (P=0.79) and complications.

Conclusion:The success rate of both techniques are comparable . CHBT and AHBT recession of lateral recti are desirable techniques in patients with exotropia.