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Comparative Topographical Analysis of Choroidal Microvascular Dropout Between Glaucoma and Nonarteritic Anterior Ischemic Optic Neuropathy.

Authors :
Lee EJ
Kee HJ
Park KA
Han JC
Kee C
Source :
Investigative ophthalmology & visual science [Invest Ophthalmol Vis Sci] 2021 Oct 04; Vol. 62 (13), pp. 27.
Publication Year :
2021

Abstract

Purpose: To identify the presence of choroidal microvascular dropout (MvD) in nonarteritic anterior ischemic optic neuropathy (NAION) eyes and to characterize the topographical distribution for the mechanistic interpretation of MvD development.<br />Methods: We performed optical coherence tomography angiography on 47 open-angle glaucoma (OAG) and 19 NAION eyes with β-zone peripapillary atrophy (βPPA). We recorded the presence of MvD and compared between the peripapillary topographical measures of MvD, retinal nerve fiber layer (RNFL) defect, and βPPA in angular width and location.<br />Results: MvD was present in both diseases, marginally more frequently in NAION eyes (19/19, 100.0%) than in OAG eyes (38/47, 80.6%, P = 0.050), without a discernable difference in appearance. NAION eyes also showed wider MvD and RNFL defects compared to OAG eyes (both P < 0.001). In topographical measurements, the distribution of MvD showed a strong correspondence to superimposition areas of βPPA and RNFL defects, more distinctly than to RNFL defects (all P < 0.001). The outline of superimposition area also remarkably resembled the MvD area.<br />Conclusions: MvD was present in both the OAG and NAION groups. The βPPA-RNFL defect superimposition area topographically and morphologically matched MvD. Further investigations are needed to elucidate the role of RNFL defects in the pathogenesis of MvD and the clinical significance.

Details

Language :
English
ISSN :
1552-5783
Volume :
62
Issue :
13
Database :
MEDLINE
Journal :
Investigative ophthalmology & visual science
Publication Type :
Academic Journal
Accession number :
34705024
Full Text :
https://doi.org/10.1167/iovs.62.13.27