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Related Experiment Video

Updated: Jun 9, 2026

Quantification of Optic Nerve Cross Sectional Area on MRI: A Novel Protocol using Fiji Software

Quantification of Optic Nerve Cross Sectional Area on MRI: A Novel Protocol using Fiji Software

Published on: September 4, 2021

Effective orbital volume and eyeball position: an MRI study.

Efstathios T Detorakis¹, Eleni Drakonaki, Efrosini Papadaki

¹Department of Ophthalmology, University Hospital of Heraklion, Crete, Greece. detorakis@hotmail.com

Orbit (Amsterdam, Netherlands)

|September 4, 2010

Summary

Effective orbital volume (EOV) variations correlate with orbital volume, influencing eyeball position. This finding is crucial for planning orbital surgeries and treatments.

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Area of Science:

Ophthalmology
Medical Imaging
Anatomy

Background:

Orbital volume and eyeball position are influenced by various factors.
Effective orbital volume (EOV) is a key metric for understanding orbital anatomy.

Purpose of the Study:

To investigate the role of effective orbital volume (EOV) in determining eyeball position.
To analyze the relationship between EOV, orbital volume, and eyeball volume.

Main Methods:

MRI scans of 46 patients were analyzed to measure orbital and eyeball volumes.
Effective orbital volume (EOV) was calculated as the difference between orbital and eyeball volumes.
Globe protrusion was measured in sagittal and transverse planes.

Main Results:

EOV significantly correlated with orbital volume, not eyeball volume.
EOV was significantly associated with both transverse and sagittal globe protrusions.
Females had smaller orbital and eyeball volumes and lower EOV than males, but greater transverse globe protrusion.

Conclusions:

Effective orbital volume (EOV) variations are linked to orbital volume, impacting eyeball protrusion.
EOV is a valuable parameter for surgical planning in ophthalmology, including orbital decompression and enucleation.
Understanding EOV aids in managing conditions like enophthalmos and selecting appropriate orbital implant sizes.