Assessment of periosteal fixation of partial VRT and lateral rectus in subjects of exotropic duane retraction syndrome

Abstract

Owing to the ability of the lateral rectus to contract during adduction is regained, the surgical procedures only partly relieve the problem. Complete relief is seen only when the innervation to the lateral rectus, which is misdirected, is managed effectively. The present study was conducted to prospectively evaluate the efficacy of periosteal fixation of the lateral rectus muscle and periosteal fixation along with the partial VRT in subjects with Exo-DRS. 15 subjects with Exo-DRS were randomly divided into two groups, where Group I (n=7) subjects were treated with periosteal fixation of the lateral rectus muscle and Group II (n=8) subjects were treated using periosteal fixation of the lateral rectus muscle with split VRT. At 1 week, 1 month, and 3 months postoperatively, exophthalmometry, binocular single visual field, abduction and adduction range, and prism bar cover test was assessed. Adduction changed postoperatively from -1.7 to -0.5 in subjects of Group I and from -1.3 to -0.5 in subjects of Group II. TBSF (Total binocular single visual field) was 14.5 in subjects of Group I preoperatively and was 11.6 in subjects of Group II postoperatively. This change postoperatively was significant in both groups. In Group I.