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Slanted lateral rectus recession for exotropia with convergence weakness
M Snir1, R Axer-Siegel, B Shalev
1Pediatric Ophthalmology Unit, Schneider Children's Medical Center of Israel, Tel Aviv.
Ophthalmology
|May 18, 1999
Summary
Slanted lateral rectus recession effectively treats exotropia (XT) with convergence weakness, significantly reducing near and distance deviations. This surgical technique also shows promise for improving stereopsis.
Area of Science:
- Ophthalmology
- Strabismus Surgery
Background:
- Exotropia (XT) with convergence weakness presents challenges in surgical correction.
- Differentiating near and distance deviations is crucial for treatment planning.
Purpose of the Study:
- To compare the efficacy of slanted lateral rectus (LR) recession versus standard LR recession for exotropia (XT).
- To evaluate the impact on ocular alignment at distance and near, and stereopsis.
Main Methods:
- A predesigned, nonrandomized comparative trial involving 12 patients undergoing slanted LR recession and 6 controls receiving standard LR recession.
- Participants had exotropia greater at near than at distance by at least 10 prism diopters (PD).
Main Results:
- Slanted LR recession corrected XT to <8 PD at distance in all patients and at near in 11/12.
- The mean difference between distance and near exodeviation decreased from 14 PD to 2.9 PD postoperatively.
- Control subjects had residual exotropia >8 PD at near; 3 study patients gained gross stereopsis.
Conclusions:
- Slanted LR recession is superior to standard recession for reducing distance and near XT.
- This technique effectively minimizes the difference between distance and near exodeviations.
- Slanted LR recession may positively influence gross stereopsis in patients with exotropia.