Elevation deficit caused by accessory extraocular muscle.

Am J Ophthalmol

Department of Strabismus and Neuroophthalmology, Kantonsspital St. Gallen, Switzerland.

Published: April 1996

AI Article Synopsis

  • The study documents a case of a 6-year-old boy with an eye elevation deficit due to an extra muscle.
  • Medical imaging techniques like CT and MRI confirmed the presence of this accessory muscle in the eye's retrobulbar space.
  • The findings suggest that this unusual muscle could be an atavistic retractor bulbi, a rare anatomical variation.

Article 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.

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Source
http://dx.doi.org/10.1016/s0002-9394(14)70445-3DOI Listing

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