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Lateral incomitancy and surgical results in intermittent exotropia
Chang Ho Yoon1, Seong-Joon Kim1
1Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Republic of Korea.
The British Journal of Ophthalmology
|May 17, 2014
Summary
Preoperative lateral incomitance (LI) did not affect surgical outcomes for intermittent exotropia. The prevalence of significant LI remained unchanged after bilateral or unilateral lateral rectus recession surgery.
Area of Science:
- Ophthalmology
- Strabismus Surgery
- Binocular Vision
Background:
- Intermittent exotropia is a common strabismus condition.
- Lateral incomitance (LI) is a deviation in eye movement that may impact surgical outcomes.
- Evaluating LI's role in intermittent exotropia surgery is crucial for understanding treatment efficacy.
Purpose of the Study:
- To determine the prevalence of lateral incomitance (LI) in patients undergoing surgery for intermittent exotropia.
- To assess the association between preoperative LI and surgical outcomes.
- To analyze changes in LI after surgical correction.
Main Methods:
- Retrospective analysis of 155 patients with intermittent exotropia followed for at least 18 months post-surgery.
- Definition of significant preoperative (preLI+) and postoperative (postLI+) LI based on prism diopter (PD) changes.
- Investigation of factors including surgical technique (bilateral vs. unilateral lateral rectus recession) and patient characteristics.
Main Results:
- Prevalence of preoperative significant LI (preLI+) was 40.6% (63/155 patients).
- No significant association was found between preLI+ and surgical failure (p=0.140).
- Bilateral and unilateral lateral rectus recession did not induce significant LI; non-operated eyes in ULR showed reduced LI.
Conclusions:
- Preoperative lateral incomitance does not appear to influence surgical success rates in intermittent exotropia.
- Surgical correction of intermittent exotropia using bilateral or unilateral lateral rectus recession does not alter the prevalence of significant LI.
