Hang-back versus conventional recession of medial rectus muscles

ABSTRACT

Forty five patients were included in this study. 25 patients with mean age 4.3 years who underwent conventional medial rectus recession [CR], 10 had infantile esotropia and 15 had acquired esotropia. 20 patients with mean age 5.2 years who underwent hang - back medial rectus recession [HBR], 8 had infantile esotropia and 12 had acquired esotropia. No statistical significant difference in success rate [correction within 10 prism diopters] was noted between two groups. The six months success rate was 84% for CR compared to 85% for HER. In infantile esotropia the success rate was 90% for CR and 87.5% for HBR. In acquired esotropia, the success rate was 80% for CR and 83.3% for HBR. Over correction occurred in 2 cases [8%] of CR and in one case [5%] of HER. Undercorrection was noted in 2 cases [8%] of CR and in 2 cases [10%] of HBR. Hang- back recession of medial rectus muscle is safe, easier to perform and is a satisfactory alternative to conventional recession surgery