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Surgical Correction for Pediatric Epiblepharon and Trichiasis
Published on: July 8, 2025
Surgical outcomes in convergence insufficiency-type exotropia
Hee Kyung Yang1, Jeong-Min Hwang
1Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
Ophthalmology
|April 9, 2011
Summary
Strabismus surgery outcomes for convergence insufficiency (CI)-type exotropia depend on monocular occlusion response. Unilateral resection-recession surgery is recommended for CI-type exotropia maintained after occlusion.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Strabismus Surgery
Background:
- Convergence insufficiency (CI)-type exotropia presents unique surgical challenges.
- Diagnostic monocular occlusion is crucial for classifying CI-type exotropia.
- Understanding surgical efficacy based on occlusion response is vital for treatment planning.
Purpose of the Study:
- To evaluate the effectiveness of different strabismus surgical techniques in patients with CI-type exotropia.
- To correlate surgical outcomes with patient responses to diagnostic monocular occlusion.
- To identify optimal surgical strategies for specific CI-type exotropia classifications.
Main Methods:
- Retrospective cohort study of 65 patients with CI-type exotropia (near-distance difference ≥10 PD).
- Patients categorized into true-CI, masked-CI, and pseudo-CI groups based on monocular occlusion response.
- Surgical procedures included bilateral lateral rectus recession (BLR) or unilateral medial rectus resection/lateral rectus recession (RR).
Main Results:
- The unilateral resection-recession (RR) procedure demonstrated significantly higher success rates (100%) compared to bilateral lateral rectus recession (BLR) (61%) in true-CI and masked-CI groups at 2 years.
- Success rates were 77% for RR and 71% for BLR in the pseudo-CI group.
- RR proved superior to BLR in true-CI and masked-CI patient groups.
Conclusions:
- Surgical success in CI-type exotropia is strongly linked to the patient's response to monocular occlusion.
- For CI-type exotropia that persists after monocular occlusion, the unilateral resection-recession procedure is the recommended surgical approach.
- Tailoring surgical strategy based on occlusion response improves outcomes in CI-type exotropia.
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