Rectus muscle position in V-pattern strabismus: a study with coronal computed tomography scanning

Coronal computerized tomographic (CT) scans were obtained on ten children with previously unoperated V-pattern strabismus and ten control patients to determine the relationship of rectus muscles to the globe. All patients with V-pattern had sufficient overaction of the inferior oblique muscles to wa...

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Bibliographic Details
Published in:Graefe's archive for clinical and experimental ophthalmology 1988-01, Vol.226 (2), p.183-186
Main Authors: SAUNDERS, R. A, HOLGATE, R. C
Format: Article
Language:English
Subjects:
Age Factors
Biological and medical sciences
Child
Child, Preschool
Esotropia - diagnostic imaging
Esotropia - physiopathology
Exotropia - diagnostic imaging
Exotropia - physiopathology
Female
Humans
Infant
Male
Medical sciences
Oculomotor disorders
Oculomotor Muscles - diagnostic imaging
Oculomotor Muscles - physiopathology
Ophthalmology
Strabismus - diagnostic imaging
Strabismus - physiopathology
Tomography, X-Ray Computed
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Description
Summary:Coronal computerized tomographic (CT) scans were obtained on ten children with previously unoperated V-pattern strabismus and ten control patients to determine the relationship of rectus muscles to the globe. All patients with V-pattern had sufficient overaction of the inferior oblique muscles to warrant bilateral surgical weakening. Control patients had no strabismus or isolated horizontal deviations without A- or V-patterns. Using a horizontal reference line constructed along the anterior cranial fossa, the mean horizontal rectus-muscle axes were found to approximate the expected value of 180 degrees closely. The vertical rectus muscle axes were excyclotorted in both groups. However, there was no significant difference in the mean superior temporal quadrant angles formed by the intersection of the horizontal and vertical rectus muscle axes. Analysis of covariance with age as the covariant demonstrated a significant relationship (P less than 0.01) between age and the superior temporal quadrant angle measured in each eye. Our data suggest that apparent rectus muscle malposition identified by CT scanning is a function of age and cannot be implicated as an important cause of V-pattern strabismus.
ISSN:0721-832X
1435-702X
DOI:10.1007/BF02173315