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Long-standing, large-angle exotropia in adults.
The American Orthoptic Journal
|December 15, 2010
Summary
Non-adjustable surgery for large-angle exotropia in adults effectively corrects alignment and avoids permanent double vision. Some patients even regain stereopsis after this surgical treatment.
Area of Science:
- Ophthalmology
- Strabismus Surgery
- Adult Patient Care
Background:
- Large-angle exotropia in adults can significantly impact visual function.
- Surgical correction is often necessary for functional improvement.
Purpose of the Study:
- To evaluate the sensory and motor outcomes of non-adjustable bilateral recess-resect procedures in adult patients with large-angle exotropia.
- To assess the efficacy of this surgical approach in achieving alignment and preserving/recovering binocular vision.
Main Methods:
- Retrospective review of adult patients with exotropia ≥ 50 prism diopters (Δ) who underwent non-adjustable symmetric bilateral medial rectus resections and bilateral lateral rectus recessions.
- Data collected included postoperative alignment, stereoacuity, and incidence of diplopia.
Main Results:
- Seven of eight patients achieved alignment within 10Δ of orthophoria after a single surgery.
- No patients reported permanent diplopia post-surgery.
- Four patients demonstrated postoperative stereoacuity ranging from 200 to 40 seconds of arc.
Conclusions:
- Non-adjustable surgery for large-angle exotropia in adults can yield successful alignment and avoid persistent diplopia.
- The recovery of stereopsis is possible even in long-standing cases of exotropia.
- The findings suggest that some residual fusion ability may contribute to the success of surgical alignment.
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