Related Experiment Videos
Modified Anderson procedure for correcting abnormal mixed head position in nystagmus
M E Arroyo-Yllanes1, A Fonte-Vázquez, J F Pérez-Pérez
1Pediatric Ophthalmology and Strabismus Clinic, Deparment of Ophthalmology, Hospital General de Mexico, Mexico, DF. mearroyo@mexis.com
The British Journal of Ophthalmology
|February 28, 2002
Summary
Surgical weakening of horizontal eye muscles effectively improves abnormal head positions in patients with nystagmus. This treatment addresses all three axes of head deviation, offering significant benefits for patients with complex visual conditions.
Area of Science:
- Ophthalmology
- Strabismus Surgery
- Pediatric Ophthalmology
Background:
- Treatment for nystagmus with abnormal head position is challenging.
- Abnormal head position can involve multiple axes.
Purpose of the Study:
- To demonstrate improvement in torsional and vertical components of abnormal head position.
- To show efficacy of addressing only horizontal factors in nystagmus with abnormal head position.
Main Methods:
- Studied 21 patients with horizontal nystagmus and abnormal head position.
- Performed a modified Anderson procedure involving 2 mm retroequatorial recessions of horizontal yoke rectus muscles.
- Included strabismus corrective surgery when necessary.
Main Results:
- Surgery on horizontal yoke rectus muscles significantly improved all three components of abnormal head position (p=0.001).
Conclusions:
- Large recessions of horizontal yoke rectus muscles are effective for nystagmus with blockage position.
- This surgical approach diminishes abnormal head position across all three axes when head turn predominates.