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Factors affecting postoperative stereopsis in acquired nonaccommodative esotropia
Toby Y B Chan1, Alex J Mao, Jacqueline R Piggott
1Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto.
Canadian Journal of Ophthalmology. Journal Canadien D'Ophtalmologie
|December 11, 2012
Summary
Early age of onset significantly impacts postoperative outcomes for acquired nonaccommodative esotropia (ANAET) in children. Surgery before 30 months is critical for regaining bifoveal fixation and achieving good stereopsis.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Strabismus Surgery
Background:
- Acquired nonaccommodative esotropia (ANAET) is a complex strabismus condition in children.
- Postoperative binocularity and stereopsis are key functional outcomes following surgical correction.
Purpose of the Study:
- To identify factors influencing postoperative binocularity in pediatric ANAET patients.
- To evaluate the impact of age at onset, duration of misalignment, and other clinical variables on achieving stereopsis.
Main Methods:
- Retrospective chart review of 34 pediatric patients undergoing surgery for ANAET.
- Multivariate logistic regression analysis to assess predictors of postoperative stereopsis.
Main Results:
- 41% of patients achieved excellent stereoacuity (≤100 seconds of arc).
- Age at onset was the sole significant predictor of postoperative stereopsis (OR=1.063, P<0.05).
- Children with onset before 30 months did not regain bifoveal fixation, irrespective of surgery timing.
Conclusions:
- Age at onset is a critical determinant of functional outcomes in pediatric ANAET.
- Delayed surgery beyond 30 months of age does not appear to negatively affect bifoveal fixation recovery.
