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Three-dimensional choroidal contour mapping in healthy population.

Supriya Arora1, Sumit Randhir Singh2, Brian Rosario3

  • 1Bahamas Vision Centre and Princess Margaret Hospital, Nassau NP, Bahamas.

Scientific Reports
|March 15, 2024
PubMed
Summary

The choroid

Keywords:
3-Dimensional choroidal surfaceChoroidal contourChoroidal inner boundaryChoroidoscleral interfaceNormative database

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Anatomy

Background:

  • The choroid's 3-dimensional structure is crucial for ocular health.
  • Understanding choroidal contour variations is essential for diagnosing eye conditions.

Purpose of the Study:

  • To investigate the 3-dimensional choroidal contour at the choroidal inner boundary (CIB) and choroidal outer boundary (COB) in healthy eyes.
  • To analyze age-related changes in choroidal curvature.

Main Methods:

  • Utilized wide-field swept-source optical coherence tomography (OCT) for imaging healthy eyes.
  • Delineated the CIB and COB using established methods.
  • Quantitatively analyzed CIB and COB surfaces by calculating the best-fit spherical radius (R), both overall and sectorally.

Main Results:

  • The choroidal outer boundary (COB) had a smaller radius (flatter curvature) than the choroidal inner boundary (CIB) across all subjects (R COB: 22.5 ± 4.8 mm vs. R CIB: 32.4 ± 9.4 mm).
  • The central sector exhibited the steepest curvature (smallest R) at both CIB and COB.
  • Age demonstrated a negative correlation with CIB radius (steeper with age) and a positive correlation with COB radius (flatter with age).

Conclusions:

  • The choroidal contour, at both CIB and COB, has a prolate shape, being steepest in the central sector.
  • The COB is steeper than the CIB in healthy eyes.
  • With increasing age, the COB flattens while the CIB steepens.