Related Experiment Videos
Elevation deficit caused by accessory extraocular muscle
C Valmaggia1, W Zaunbauer, I Gottlob
1Department of Strabismus and Neuroophthalmology, Kantonsspital St. Gallen, Switzerland.
American Journal of Ophthalmology
|April 1, 1996
Abstract
Purpose:
To report an elevation deficit, which was caused by an accessory extraocular muscle, in a 6-year-old boy.
Methods:
Computed tomography and magnetic resonance imaging were used to confirm an accessory, fusiform, well-defined, solid structure in the retrobulbar space.
Results:
A supernumerary intraconal muscle was detected between the annulus of Zinn and the posterior part of the left globe.
Conclusion:
This rare anomaly may represent an atavistic retractor bulbi muscle.