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Inferior oblique inclusion after lateral rectus surgery.
E M Helveston1, D M Alcorn, F D Ellis
1Indiana University School of Medicine, Department of Ophthalmology, Indianapolis 46223.
Summary
Inadvertent inclusion of the inferior oblique muscle during lateral rectus surgery can cause persistent vertical deviation. Surgeons should inspect the lateral rectus muscle
Area of Science:
- Ophthalmology
- Strabismus Surgery
Background:
- Inferior oblique muscle incorporation into the lateral rectus muscle is a rare complication following strabismus surgery.
- This complication can lead to significant vertical deviations and motility deficits.
Purpose of the Study:
- To evaluate the clinical characteristics of patients experiencing inadvertent inferior oblique muscle incorporation after lateral rectus surgery.
- To identify risk factors and outcomes associated with this surgical complication.
Main Methods:
- A retrospective and prospective study design was employed.
- Nineteen patients with inadvertent inferior oblique muscle incorporation were analyzed.
- Data collected included preoperative deviations, surgical history, and postoperative outcomes.
Main Results:
- Inferior oblique inclusion occurred after both lateral rectus resection (13 cases) and recession (6 cases).
- Most patients presented with preoperative vertical deviations (hypotropia or hypertropia).
- A deficient elevation in adduction was noted in all affected patients.
- Persistent vertical deviation was common even after reoperation to free the muscle.
Conclusions:
- Inadvertent inferior oblique muscle incorporation is a complication that can lead to persistent vertical deviations.
- Meticulous surgical technique, including inspection of the inferior oblique muscle's undersurface before lateral rectus reattachment, is crucial to avoid this complication.
- Early identification and appropriate surgical management are important for patients with this condition.