Abstract:
PURPOSE:To evaluate whether quantity of choroidal tissue directly adjacent to the optic nerve differs between eyes with and without glaucoma and whether beta-zone parapapillary atrophy influences this relationship. DESIGN:Prospective cohort study. METHODS:Subjects were enrolled in a longitudinal, observational study at our institution. We studied 1 eye of 63 primary open-angle glaucoma (POAG), 30 ocular hypertension (OH), and 48 control subjects. Using optical coherence tomography enhanced depth imaging, we acquired 12 radial scans centered on the optic nerve head with 15 degrees of separation between scans. After images were enhanced, segmented, and corrected for ocular magnification, juxtapapillary choroidal volumetric parameters were calculated using raw thickness measurements and standard interpolation techniques. Juxtapapillary choroidal volume was then compared by diagnosis and by beta-zone parapapillary atrophy status. RESULTS:Total juxtapapillary choroidal volume was significantly reduced in POAG vs OH and control eyes (1.057 vs 1.228 vs 1.255 μL, P = .04) and it was reduced in eyes with vs without beta-zone parapapillary atrophy (1.076 μL, n = 80 vs 1.306 μL, n = 61, P < .001). Juxtapapillary choroidal volume did not differ between POAG, OH, and control eyes when beta-zone parapapillary atrophy was absent, but juxtapapillary choroidal volume was significantly reduced in POAG vs control eyes when beta-zone parapapillary atrophy was present (0.957 vs 1.196 μL, P = .02). Furthermore, POAG eyes with beta-zone parapapillary atrophy had substantially lower juxtapapillary choroidal volume compared to POAG eyes without beta-zone parapapillary atrophy (0.957 vs 1.356 μL, P < .001). CONCLUSIONS:The volume of choroid adjacent to the optic nerve was significantly reduced in POAG eyes when beta-zone parapapillary atrophy was present, suggesting that beta-zone parapapillary atrophy may be a biomarker for juxtapapillary choroidal atrophy and associated vascular compromise in POAG.
journal_name
Am J Ophthalmoljournal_title
American journal of ophthalmologyauthors
Sullivan-Mee M,Patel NB,Pensyl D,Qualls Cdoi
10.1016/j.ajo.2015.06.024subject
Has Abstractpub_date
2015-10-01 00:00:00pages
637-47.e1issue
4eissn
0002-9394issn
1879-1891pii
S0002-9394(15)00379-7journal_volume
160pub_type
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