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Three-dimensional choroidal parameter differences in myopic anisometropia.

Qiujian Zhu1, Xiaoying Xing2, Lie Ma1

  • 1Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, China.

BMC Ophthalmology
|October 17, 2025
PubMed
Summary
This summary is machine-generated.

Three-dimensional choroidal metrics like choroidal vascular volume (CVV) and choroidal stroma volume (CSV) decrease with myopia severity in anisometropia. The nasal choroid is particularly vulnerable to axial elongation, indicating potential for imaging in myopia evaluation.

Keywords:
Choroidal stroma volumeChoroidal vascular volumeMyopic anisometropiaSwept-source OCTThree-dimensional choroidal vascularity index

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Retinal Research

Background:

  • Myopic anisometropia presents varying degrees of refractive error between eyes.
  • Understanding choroidal structural changes in anisometropia is crucial for myopia management.
  • Quantitative 3D choroidal parameters require comparison between fellow eyes with differing myopia.

Purpose of the Study:

  • To quantitatively compare 3D choroidal parameters in fellow eyes of individuals with myopic anisometropia.
  • To evaluate correlations between choroidal parameters and interocular differences in spherical equivalent (△SE) and axial length (△AL).
  • To assess regional choroidal variations and retinal vessel density in relation to anisometropia severity.

Main Methods:

  • Retrospective cross-sectional study of 102 participants (204 eyes) with low, moderate, and high anisometropia.
  • Measurement of 3D choroidal vascular volume (CVV), choroidal stroma volume (CSV), and 3D choroidal vascularity index (3D-CVI) using swept-source optical coherence tomography (SS-OCT).
  • Analysis of retinal vessel density (VD) and regional variations.

Main Results:

  • Significantly lower CVV and CSV in more myopic eyes across all groups, most pronounced in high anisometropia.
  • Strongest correlations between interocular differences in CVV/CSV and SE/AL found in nasal regions (coefficients up to 0.403, P < .001).
  • Elevated retinal VD in more myopic eyes of the high anisometropia group suggests compensatory microvascular changes.

Conclusions:

  • 3D choroidal metrics (CVV, CSV) effectively reflect myopic severity in anisometropia.
  • The nasal choroid shows increased vulnerability to axial elongation.
  • Volumetric choroidal imaging shows potential for evaluating myopic structural changes; longitudinal studies are needed.