Comparative Study of Unilateral and Bilateral Surgery in Moderate Exotropia

Abstract

Unilateral and bilateral rectus recession are equally effective in mild to moderate exotropia.

Long-term surgical outcomes and factors for recurrence after unilateral lateral rectus muscle recession

“…A possible explanation for the worse prognosis in patients with 20–24 PD IXT is that 8.0–8.5 mm recession is insufficient. We performed 8.0 mm recession for 20 PD of IXT and 8.5 mm for 21–24 PD of IXT, similar to previous reports 6 8. However, surgical tables as a guideline for ULR are still under debate.…”

“…Bilateral lateral rectus muscle recession (BLR) or unilateral lateral rectus muscle recession (ULR) and medial rectus muscle resection (RR) are traditional surgical procedures in IXT 2 3. ULR was described as another surgical option for small to moderate angle exotropia in 19504 with favourable success rate 5 6. However, the long-term outcomes in a large number of patients are unclear 6–8…”

Lateral incomitancy and surgical results in intermittent exotropia

“…Similarly, large ULR reduces the force of abduction which can create LI after surgery. However, there are reports that significant incomitancy following ULR did not occur 17 22. Dadeya and Kamlesh8 suggested that marked recession of the lateral rectus can be performed without LI because the arc of contact of lateral rectus muscle is long and the functional equator lies far behind the anatomy.…”

“…Some studies define preLI+ as a reduction of the exoangle by more than 40%,13 one-third14 or 20%4 6 compared with the primary gaze, while others set the criterion as an absolute deviation difference of >10 PD4 7 15 or ≥5 PD 16 17. We defined preLI+ as a reduction of the exodeviation by more than 5 PD in the preoperative condition and postLI+ as >5 PD of change in the postoperative condition compared with the primary gaze.…”

One muscle strabismus surgery

“…There was a tendency that the larger recessions have a higher recurrent rate of exotropia. Menon et al [9] prospectively compared the results of unilateral lateral rectus recession with bilateral lateral rectus recession for the correction of 20 cases of intermittent exotropia ranging from 15 to 25 PD with 3 months follow-up. The authors concluded that unilateral and bilateral rectus recession are equally effective in mild to moderate exotropia.…”