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Published in: Graefe's Archive for Clinical and Experimental Ophthalmology 11/2020

01-11-2020 | Angiography | Retinal Disorders

Choroidal vascularity index and choriocapillary changes in retinal vein occlusions

Authors: Yavuz Kemal Aribas, Ahmet M. Hondur, Tongalp H. Tezel

Published in: Graefe's Archive for Clinical and Experimental Ophthalmology | Issue 11/2020

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Abstract

Purpose

To evaluate the changes in the choroidal structure in the setting of retinal vein occlusion (RVO).

Methods

Changes in the structure of the choroid were studied in sixty-four eyes with unilateral central or branch RVO using optical coherence tomography (OCT) with enhanced depth imaging and OCT-angiography (OCT-A). Choroidal vascularity index (CVI), Haller layer/choroidal thickness (H/C) ratio, and choriocapillaris flow density were used to compare the structural characteristics of the choroid with fellow eyes and the eyes of thirty-four age-, gender-, and systemic co-morbidity–matched controls.

Results

Eyes with RVO had a higher H/C ratio but a lower choriocapillaris flow density compared to both fellow and control eyes (p < 0.001). CVI was significantly lower in both eyes of the patients with RVO compared with control eyes (p < 0.05) with a more robust decrease in the eye that had developed RVO (p < 0.001). The H/C ratio (r = 0.303 p < 0.001), CVI (r = − 0.268, p = 0.001), and choriocapillaris flow density (r = − 0.237, p = 0.003) were all correlated with logMAR visual acuity, and other clinical features.

Conclusion

Retinal vein occlusions alter the hemodynamic properties of the choroid leading to structural changes. These changes may be secondary to a compensatory mechanism to supply oxygen to hypoxic retina.
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Metadata
Title
Choroidal vascularity index and choriocapillary changes in retinal vein occlusions
Authors
Yavuz Kemal Aribas
Ahmet M. Hondur
Tongalp H. Tezel
Publication date
01-11-2020
Publisher
Springer Berlin Heidelberg
Keyword
Angiography
Published in
Graefe's Archive for Clinical and Experimental Ophthalmology / Issue 11/2020
Print ISSN: 0721-832X
Electronic ISSN: 1435-702X
DOI
https://doi.org/10.1007/s00417-020-04886-3

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