S-BLR Versus C-BLR for CI-IXT in Children

Launched by CHEN ZHAO · Aug 19, 2019

Keywords

ClinConnect Summary

Using conventional surgical procedures, higher postoperative near undercorrection and/or distant overcorrection rates were observed in CI-IXT. To achieve better outcome, S-BLR was introduced. Previous studies showed its efficacy in reducing near exodeviation, distant exodeviation, and NDD. So far, only limited studies have directly evaluated the surgical outcomes between S-BLR and C-BLR. The pilot study done by Snir et al included 12 patients with S-BLR and 6 patients with C-BLR and the success rates of S-BLR vs C-BLR were 92% vs 0 at one-year follow-up. The retrospective study done by Song...

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • Exodeviation at least 15 at distance (6 meters);
• • Exodeviation at most 50 at near (1/3 meter);
• • Greater exodeviation at near than at distance by 10 or more;
• • Control score of exodeviation greater than 3;
• • Best-corrected visual acuity of 20/40 or better in the worse eye, and interocular difference of less than 2 lines;
• • Myopia5.00D, hyperopia3.0D and anisometropia≤2.5D based on cycloplegic refraction
• • Optical correction needed for at least 2 weeks before evaluation of exodeviation: myopia0.5D or astigmatism1.5D in either eye, or anisometropia1.0D;
• • Written informed consent given by participants and their parents or legal guardians.
• Exclusion Criteria:
• • Prior strabismus surgery or botulinum toxin injection;
• • Coexisting vertical deviation greater than 5, oblique muscle dysfunction, torsional deviation, dissociated vertical deviation, A-V pattern, or other conditions requiring horizontal rectus transposition, oblique surgery or vertical rectus surgery;
• • Paralytic or restrictive strabismus;
• • Lateral incomitance (greater exodeviation in right or left gaze position than in primary position by 5 or more with appropriate optical correction);
• • Ocular disease other than strabismus or refractive error;
• • Previous intraocular or refractive surgery;
• • Craniofacial malformations affecting the orbit;
• • Significant neurological disorders;
• • Birth date34 weeks or birth weight1500 gram.
• • Abbreviations: CI-IXT, convergence insufficiency intermittent exotropia; D, diopter.