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Masked bilateral superior oblique palsy in children
Journal of Pediatric Ophthalmology and Strabismus
|September 13, 2014
Summary
Masked bilateral superior oblique palsy can occur after surgery for unilateral superior oblique palsy in children. Lower preoperative hypertropia (<5 PD) increases the risk of needing a second surgery.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Strabismus Surgery
Background:
- Unilateral superior oblique palsy surgery can lead to contralateral superior oblique palsy, known as masked bilateral superior oblique palsy.
- This phenomenon is a recognized postoperative occurrence in strabismus surgery.
Purpose of the Study:
- To describe the occurrence of masked bilateral superior oblique palsy in children after unilateral inferior oblique weakening surgery.
- To identify risk factors associated with this postoperative complication.
Main Methods:
- Retrospective review of pediatric patients who underwent unilateral inferior oblique weakening surgery between 1987 and 2005.
- Analysis of surgical records for the development of masked bilateral superior oblique palsy and need for subsequent surgery.
Main Results:
- 18% (9 out of 50) of children developed masked bilateral superior oblique palsy requiring further surgery.
- Smaller preoperative primary position hypertropia (<5 PD) was significantly associated with an increased risk (OR 8.2) of requiring reoperation.
Conclusions:
- Masked bilateral superior oblique palsy is a potential complication following unilateral superior oblique palsy surgery in children.
- Informing parents about this risk is crucial, particularly when preoperative primary position hypertropia is less than 5 PD.
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