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Related Experiment Video

Updated: Feb 25, 2026

Evaluation of Capillary and Other Vessel Contribution to Macular Perfusion Density Measured with Optical Coherence Tomography Angiography
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TEMPORAL VASCULAR ARCADE WIDTH AND ANGLE IN HIGH AXIAL MYOPIA.

Jost B Jonas1, Pascal Weber1, Natsuko Nagaoka2

  • 1Department of Ophthalmology, Medical Faculty Mannheim, Ruprecht-Karls-University of Heidelberg, Mannheim, Germany.

Retina (Philadelphia, Pa.)
|August 3, 2017
PubMed
Summary

Axial myopia is linked to changes in eye shape. Wider angle kappa correlates with shorter axial length, while longer VDA is associated with longer axial length, especially in eyes with lesions.

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Area of Science:

  • Ophthalmology
  • Ocular Biometry
  • Myopia Research

Background:

  • Axial myopia involves posterior ocular segment elongation.
  • Understanding fundus morphometrics is crucial for myopia research.

Purpose of the Study:

  • To measure posterior fundus landmarks.
  • To assess associations between these landmarks and axial length in myopia.

Main Methods:

  • Fundus photographs were used to measure morphometric variables.
  • Key measurements included vertical distance between arterial arcades (VDA) and angle kappa.
  • Multivariate regression analysis was employed to determine associations.

Main Results:

  • Wider angle kappa was associated with shorter axial length (P=0.002).
  • Longer VDA was associated with longer axial length (P<0.001), particularly in eyes with chorioretinal lesions.
  • Angle kappa changes were linked to disk-foveola distance and gamma zone enlargement.

Conclusions:

  • Axial elongation correlates with decreasing angle kappa due to increased disk-foveola distance.
  • VDA remained constant during axial elongation.
  • Macular Bruch membrane length was independent of axial elongation in eyes without lesions.