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Delayed consecutive exotropia following 7-millimeter bilateral medial rectus recession for congenital esotropia
D R Stager1, D R Weakley, M Everett
1Department of Ophthalmology, University of Texas/Southwestern Medical School, Dallas.
Insights
Delayed consecutive exotropia occurred in 27% of patients after bilateral 7-millimeter medial rectus recession for congenital esotropia. This complication, appearing years post-surgery, requires physician and parent awareness.
Area of Science:
- Ophthalmology
- Pediatric Surgery
- Strabismus Surgery
Background:
- Congenital esotropia is a common condition requiring surgical intervention.
- Medial rectus recession is a surgical technique used to correct esotropia.
- Delayed consecutive exotropia is a potential complication following strabismus surgery.
Purpose of the Study:
- To determine the rate of delayed consecutive exotropia after bilateral 7-millimeter medial rectus recession.
- To analyze the incidence of this complication based on the age of surgical intervention.
- To inform physicians and parents about the long-term risks associated with this procedure.
Main Methods:
- Retrospective analysis of 88 patients with large angle congenital esotropia.
- Patients underwent bilateral 7-millimeter medial rectus recession.
- Data collected on the occurrence and timing of delayed consecutive exotropia.
Main Results:
- A 27% rate of delayed consecutive exotropia was observed (24/88 patients).
- Higher rates were noted in infants operated on before 7 months (38%) and after 13 months (33%) of age.
- The average onset of consecutive exotropia was 26.8 months postoperatively.
Conclusions:
- Bilateral 7-millimeter medial rectus recession is associated with a significant rate of delayed consecutive exotropia.
- The timing of surgery may influence the risk of developing this complication.
- Further research comparing different surgical procedures is warranted to optimize outcomes for congenital esotropia.
Abstract:
The rate of delayed consecutive exotropia after bilateral 7-millimeter medial rectus recession for large angle congenital esotropia in 88 patients was 27% (24/88), larger than previously reported. The rate was 38% (8/21) in infants having surgery prior to 7 months of age, 20% (10/49) in infants undergoing surgery at 7 to 12 months of age, and 33% (6/18) in patients undergoing surgery at 13 months of age or later. The onset of consecutive exotropia averaged 26.8 months postoperatively, allowing a long period of good alignment for binocular vision to develop before exotropia surgery was required. Physicians and parents should be aware that delayed consecutive exotropia may develop several years postoperatively. Since delayed consecutive exotropia may be characteristic of the 7-millimeter recession procedure or characteristic of all patients who have had surgery for congenital esotropia, a prospective long-term study to compare the 7-millimeter procedure with the three- and four-muscle procedure would be helpful.