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Title: Peripapillary perfused capillary density in exfoliation syndrome and exfoliation glaucoma versus POAG and healthy controls: An OCTA study
Authors: Yanin Suwan
Lawrence S. Geyman
Masoud Aghsaei Fard
Apichat Tantraworasin
Toco Y. Chui
Richard B. Rosen
Robert Ritch
Tehran University of Medical Sciences
Faculty of Medicine, Ramathibodi Hospital, Mahidol University
Icahn School of Medicine at Mount Sinai
New York Eye and Ear Infirmary
Chiang Mai University
Keywords: Medicine
Issue Date: 1-Mar-2018
Citation: Asia-Pacific Journal of Ophthalmology. Vol.7, No.2 (2018), 84-89
Abstract: Copyright © 2017 Asia-Pacific Academy of Ophthalmology. Unauthorized reproduction of this article is prohibited. Purpose: To compare the peripapillary perfused capillary density (PCD) among eyes with exfoliation syndrome (XFS), exfoliation glaucoma (XFG), primary open-angle glaucoma (POAG), and controls. Design: Observational, cross-sectional study. Methods: Optical coherence tomography angiography (OCTA) images (4.5 × 4.5 mm) of the optic nerve head were obtained using a commercial spectral domain OCTA system (AngioVue Avanti RTVue-XR, OptoVue, Fremont, CA). Two concentric circles with 1.95-mm (inner) and 3.45-mm (outer) diameters were placed manually, producing an annulus of width 0.75 mm centered at the optic disc. PCD was calculated as the ratio of pixels associated with capillaries to the pixels in the annulus after large blood vessel removal. Continuous variables were assessed by analysis of variance and Tukey honest significant difference (HSD) test. Multiple linear regression analysis was performed to adjust for confounding factors. Results: Forty-three XFG eyes, 31 POAG eyes matched for visual field mean deviation, 33 XFS eyes, and 45 control eyes were analyzed. PCD demonstrated a progressive decrease from controls to XFS to POAG to XFG. Pairwise comparisons revealed significant differences in PCD between each pair of groups (all P < 0.01) except for PCD between XFS and POAG (P = 0.08). A multivariable model adjusting for age and stage showed a more significant decrease in PCD in XFG compared with POAG (P = 0.001). Conclusions: PCD was more significantly decreased in XFG compared with POAG eyes and in XFS compared with control eyes. OCTA provides the first quantitative evidence of the microvascular disturbance that accompanies XFS.
ISSN: 21620989
Appears in Collections:Scopus 2018

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