Abstract
Objective
To determine normal globe position values, interzygomatic distance (IZD), and globe
axial length and width on computed tomography in an Australian cohort.
Design
Retrospective cohort study.
Participants
Patients who underwent computed tomography of the orbits. Patients with bilateral
disease, previous orbital surgery, or poor scan quality were excluded.
Methods
An axial slice through the midglobe was used to conduct the globe position measurements.
Anterior globe position was defined as the perpendicular distance from the anterior
globe margin to the interzygomatic line and posterior globe position as the perpendicular
distance from the posterior globe margin to the interzygomatic line.
Results
The normal measurements (mean ± SD) were IZD, 97.4 ± 4.1 mm; anterior globe position,
18.8 ± 2.8 mm; posterior globe position, 6.2 ± 2.9 mm; axial globe length, 24.9 ±
1.1 mm; and axial globe width, 25.9 ± 1.2 mm. A significant positive correlation was
seen between the IZD and the anterior globe position (r = 0.15, p = 0.03), axial globe length (r = 0.33, p < 0.01), and axial globe width (r = 0.30, p < 0.01).
Conclusion
This normative globe position data may be used to diagnose radiologic exophthalmos
or enophthalmos.
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Article Info
Publication History
Published online: May 28, 2022
Accepted:
May 4,
2022
Received in revised form:
May 1,
2022
Received:
March 5,
2022
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2022 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.
