Glaucoma-like Parapapillary Choroidal Microvasculature Dropout in Patients with Compressive Optic Neuropathy

Eun Ji Lee, Ji Ah Kim, Tae Woo Kim, Hyunjoong Kim, Hee Kyung Yang, Jeong Min Hwang

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Purpose: To characterize peripapillary choroidal microvasculature dropout (MvD) in patients with compressive optic neuropathy (CON) as compared with those with open-angle glaucoma (OAG) using OCT angiography (OCTA). Design: Cross-sectional, observational study. Participants: Eighty-eight eyes of 44 patients with CON; 88 eyes of 88 patients with OAG matched by age, spherical error, and OCT-determined retinal nerve fiber layer thickness (RNFLT); and 88 eyes of 44 control participants matched by age and spherical error. Methods: Peripapillary microvasculature was evaluated, and peripapillary vessel density was measured in en face images segmented into inner-retinal and choroidal layers using swept-source OCTA. An MvD was defined as a focal sectoral capillary dropout with no visible microvascular network in the choroidal layer. Main Outcome Measures: Comparative characteristics of MvD in eyes with CON and OAG. Results: Microvasculature dropout was observed in 30 eyes (34.1%) of 22 patients (50.0%) with CON, and in 48 eyes of 48 patients (54.5%) with OAG (P = 0.011). All MvDs in the CON group were located in the temporal parapapillary sector, whereas MvDs in the OAG group were located in the temporal-inferior (n = 36) and temporal-superior (n = 4) sectors. At their locations, MvDs in the CON group were accompanied by significant reductions in retinal vessel density and RNFLT, but this was not observed in the OAG group. The presence of MvD was associated significantly with female gender (P = 0.020) and thinner global retinal nerve fiber layer (P = 0.006) in the CON group, but not in the OAG group. Conclusions: OCT angiography of the peripapillary area showed retinal and choroidal microvasculature impairment in patients with both CON and OAG. However, the features and associated characteristics of MvD differed between these groups, suggesting that the pathogenesis of peripapillary microvascular impairment may be diverse.

Original languageEnglish
Pages (from-to)1652-1662
Number of pages11
JournalOphthalmology
Volume127
Issue number12
DOIs
Publication statusPublished - 2020 Dec

Bibliographical note

Publisher Copyright:
© 2020 American Academy of Ophthalmology

All Science Journal Classification (ASJC) codes

  • Ophthalmology

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