PURPOSE: To compare results of three sutures vs. single suture union of superior rectus (SR) and lateral rectus (LR) muscles in treatment of myopic strabismus fixus (MSF).
METHODS: This is a retrospective review of medical records of patients who underwent SR and LR muscle union for MSF between July 2012 and August 2014. 10 patients (20 eyes) were identified; 6 patients received three sutures while 4 patients underwent single suture muscle union. All eyes underwent additional 10mm medial rectus recession. The primary outcome variables were changes in ocular deviation and degree of limitation of ocular motility.
RESULTS: At the last follow-up, mean esotropia improved from 93.3±23.5PD to 21.6±8.7PD (three sutures) and from 102.5±15.5PD to 50±9.1PD (single suture). Mean hypotropia improved from 13.8±4.6PD to 1.6±1.9PD (three sutures) and from 14.25±4.3PD to 3±2.5PD (single suture). Mean abduction limitation decreased from −3.6±1.3 to −0.9±0.6 (three sutures) and from −4.3±1.1 to −3.12±0.8 (single suture). Mean limitation of elevation decreased from −3.1±1.3 to −1.4±1.08 (three sutures) and from −3.7±1.2 to −2.8±0.5 (single suture). The difference between both groups was statistically significant in improvement of esotropia (p=0.0011) and reduction of limitation of abduction (p= 0.0052) and elevation (p= 0.0092), while there was no significant difference in correction of hypotropia (p=0.6746). One LR muscle was split intraoperatively in three sutures group.
CONCLUSIONS: In MSF, three sutures SR and LR muscle union is superior to single suture in improving esotropia and limitation of ocular motility.
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