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Quantification of global orbital shape variation.

Alice Prevost1, Samuel Muller2, Frédéric Lauwers1

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|January 17, 2023
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Summary
This summary is machine-generated.

This study developed a 3D method to quantify orbital shape, finding significant variations but no link to gender, age, or size in healthy adults. Future research may explore other factors influencing orbital morphology.

Keywords:
anatomic variationanatomyophthalmological surgical procedureorbit

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Area of Science:

  • Anatomy
  • Medical Imaging
  • Geometric Morphometrics

Background:

  • Orbital shape complexity exceeds traditional linear measurements.
  • A global 3D quantification of orbital shape variation is lacking.
  • Understanding orbital shape variations is crucial for anatomical and clinical studies.

Purpose of the Study:

  • To develop a novel 3D method for quantifying global orbital shape variation.
  • To investigate the influence of gender, orbital size, and age on orbital shape.
  • To establish a baseline for orbital shape in a healthy adult population.

Main Methods:

  • Utilized computed tomography (CT) scans from 60 healthy adults (30 male, 30 female).
  • Applied geometric morphometrics to analyze 3D reconstructed orbits, measuring 140 semi-landmarks.
  • Employed principal component analysis (PCA) to define orbital shape variations.

Main Results:

  • The superior orbital fissure length showed the most significant variation.
  • A spectrum of orbital shapes was observed, from short/wide to tall/narrow.
  • No statistically significant impact of age, gender, or orbital size on shape variation was detected.

Conclusions:

  • The developed 3D method provides a comprehensive approach to quantifying orbital shape.
  • Orbital shape variation in healthy adults is not significantly influenced by age, gender, or size.
  • Further research should explore embryological origins, neurovascular pathways, and ethnicity as potential factors.