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Bimedial rectus recession measured from the limbus for congenital esotropia
1Department of Ophthalmology, Hôpital Sainte-Justine, Montreal, PQ.
Insights
Bimedial rectus muscle recession surgery for congenital esotropia in infants achieved a 68% success rate. Undercorrection was the main cause of failure, particularly in large-angle deviations.
Area of Science:
- Ophthalmology
- Pediatric Surgery
- Strabismus Surgery
Background:
- Congenital esotropia is a common condition in infants.
- Surgical intervention is often necessary to correct significant eye deviations.
- Bimedial rectus muscle recession is a surgical technique used to address esotropia.
Purpose of the Study:
- To evaluate the surgical outcomes of bimedial rectus muscle recession measured from the limbus in infants with congenital esotropia.
- To identify factors influencing surgical success and failure rates.
Main Methods:
- Retrospective review of 34 patients under one year of age with congenital esotropia.
- Surgical procedure involved bimedial rectus muscle recession measured from the limbus.
- Success defined as 10 prism diopters or less of horizontal deviation at 6 months post-surgery.
Main Results:
- Overall success rate was 68% (23 out of 34 patients).
- Undercorrection was the primary reason for surgical failure.
- Success rates were significantly higher in small-angle deviations (81%) compared to large-angle deviations (29%).
- Pre-operative deviation was greater in the undercorrection group (mean 65.0Δ) than in the success group (mean 54.4Δ).
Conclusions:
- Bimedial rectus muscle recession is a viable surgical option for congenital esotropia in infants.
- Surgical outcomes are influenced by the magnitude of the pre-operative deviation.
- Further investigation, including prospective randomized trials, is warranted to compare recession from the limbus versus recession from the insertion site.
Abstract:
We reviewed the surgical results of bimedial rectus muscle recession measured from the limbus in 34 patients with congenital esotropia less than 1 year of age. The mean amount of recession was 10.8 mm. The procedure was successful (10 delta or less of horizontal deviation at 6 months) in 23 patients (68%). In all but one case failure was due to undercorrection. The success rate was 81% in the small-angle deviation group, compared with 29% in the large-angle deviation group (p less than 0.01). The average amount of deviation before surgery was 54.4 delta in the surgical success group and 65.0 delta in the undercorrection group (p less than 0.02). More surgery should be done in patients with larger deviations. Prospective randomized studies are needed to evaluate the efficacy of recession from the limbus versus recession from the insertion site.