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Choroidal curvature differs significantly between healthy eyes and those with central serous chorioretinopathy (CSCR) or age-related macular degeneration (AMD). AMD eyes show the steepest choroid, while CSCR eyes exhibit the flattest contour.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Choroidal curvature analysis offers insights into ocular health.
  • Understanding choroidal morphology is crucial for diagnosing and monitoring retinal diseases.

Purpose of the Study:

  • To quantitatively evaluate choroidal curvature, specifically the choroidal inner boundary (CIB) and choroidal outer boundary (COB).
  • To compare choroidal curvature between healthy eyes and those with central serous chorioretinopathy (CSCR) and dry age-related macular degeneration (AMD).

Main Methods:

  • Retrospective analysis of 97 eyes across three groups: healthy, CSCR, and dry AMD.
  • Choroidal layer segmentation using a hybrid deep learning and 3D smoothing method.
  • Quantitative analysis of CIB and COB curvature using best-fit spherical radius (R) across different ocular regions.

Main Results:

  • Choroidal curvature radius (R) showed significant differences: RCSCR > Rhealthy > RAMD (P ≤ 0.001).
  • The central choroidal region was consistently the steepest across all groups (P < 0.001).
  • Correlation between choroidal curvature and subfoveal choroidal thickness was moderate in healthy eyes, weakening in CSCR and AMD.

Conclusions:

  • Choroidal contour is flattest in CSCR and steepest in AMD.
  • The central choroidal region demonstrates the steepest curvature in both healthy and diseased eyes.
  • Quantitative choroidal surface analysis serves as a potential clinical biomarker for disease monitoring and treatment evaluation.