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Abnormal Outer Choroidal Vasculature in Amblyopia.

Noriko Terada1, Manabu Miyata1, Yuki Muraoka1

  • 1Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.

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|February 9, 2019
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The outer choroidal vascular area is larger in amblyopic and fellow eyes compared to healthy eyes. This finding in unilateral amblyopia may help clarify the condition's origins.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Choroidal Vasculature

Background:

  • Morphological changes in the choroid are noted in amblyopia.
  • Understanding choroidal vasculature differences is crucial for amblyopia research.

Purpose of the Study:

  • To investigate differences in choroidal vasculature between amblyopic eyes, fellow eyes, and healthy eyes.
  • To utilize en face imaging from swept-source optical coherence tomography (SS-OCT) for detailed analysis.

Main Methods:

  • A prospective, observational case-control study was conducted.
  • 14 unilateral amblyopia patients and 22 healthy controls were included.
  • En face SS-OCT images analyzed inner and outer choroidal vascular areas.

Main Results:

  • Outer choroidal vascular areas were significantly larger in amblyopic and fellow eyes compared to healthy eyes (P < 0.001).
  • No significant differences were found in inner or outer choroidal vascular areas between amblyopic and fellow eyes (P > 0.9).
  • An outer choroidal vascular area of 59% served as a cutoff for distinguishing patients from controls.

Conclusions:

  • The outer choroidal vascular area is enlarged in both amblyopic and fellow eyes relative to healthy eyes.
  • These findings contribute to understanding the etiology of amblyopia.