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Orbital Aging: A Computed Tomography-Based Study of 240 Orbits.

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Summary

Age-related changes in the orbit differ between sexes. Female bony orbits expand, positioning the globe forward, while male orbits show increased fat and posterior rim movement.

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Area of Science:

  • Ophthalmology
  • Gerontology
  • Anatomy

Background:

  • Previous research on age-related orbital changes yielded conflicting results.
  • Objective characterization of these changes is needed.

Purpose of the Study:

  • To objectively characterize age-related changes in bony orbital dimensions, soft tissue volume, and globe position.
  • To compare these changes between male and female participants of different age groups.

Main Methods:

  • A case-control study involving 120 participants (240 orbits) aged 20-30 and 60-75 years.
  • High-accuracy imaging software used for computed tomographic scans and 3D reconstructions.
  • Measurements included bony orbital dimensions, soft tissue (fat and muscle) volume, and anterior globe position.

Main Results:

  • In females, increased bony orbital volume, fat volume, central width, and anterior globe position with age.
  • In males, increased fat volume and central height, with posterior movement of the lateral rim.
  • No significant difference in anterior globe position between age groups in males.

Conclusions:

  • The female bony orbit expands with age, leading to a more anterior globe position.
  • The male bony orbital volume remains stable, with posterior lateral rim migration.
  • Sex-specific differences in orbital aging are evident.