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Abstract #80526 Published in IGR 20-3

Relationship Between Optical Coherence Tomography Angiography Peripapillary Vessel Density and Lamina Cribrosa Depth

Eah KS; Shin JW; Sung KR
Journal of Glaucoma 2019; 28: 459-464

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: PRéCIS: Peripapillary vessel density (pVD) assessed by optical coherence tomography angiography (OCT-A) has poor global and regional correlations with lamina cribrosa depth (LCD), except for the inferotemporal area. PURPOSE: To investigate the global and regional relationship between the pVD assessed by OCT-A and LCD assessed by enhanced depth imaging spectral-domain optical coherence tomography (SD-OCT). METHODS: A total of 38 eyes of 38 healthy subjects and 38 eyes of 38 glaucoma patients were included. Peripapillary microvasculature and lamina cribrosa were imaged by OCT-A and enhanced depth imaging SD-OCT, respectively. The pVD and LCD were measured at temporal, superotemporal, superonasal, nasal, inferonasal, and inferotemporal sectors. Global and regional correlations between pVD and LCD were evaluated in all subjects. RESULTS: The pVD (59.0±2.6 vs. 54.4±5.4%) and LCD (318.5±76.4 vs. 404.6±92.5 μm) were significantly different between healthy and glaucoma subjects. The average pVD assessed by OCT-A was not significantly correlated with average LCD assessed by SD-OCT (r=-0.160, P=0.167). Regional correlation between pVD and LCD was statistically significant only in the inferotemporal sector (r=-0.301 and P=0.008). In the linear regression analysis, reduced pVD was independently associated with decreased visual field mean deviation and peripapillary retinal nerve fiber layer thickness but not with increased LCD. CONCLUSIONS: Global and regional correlations between pVD and LCD were poor except for the inferotemporal sector. This finding suggests that peripapillary microvascular impairment may not result directly from posterior lamina cribrosa displacement.

Department of Ophthalmology, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Korea.

Full article

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Classification:

6.9.2.2 Posterior (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis > 6.9.2 Optical coherence tomography)
6.11 Bloodflow measurements (Part of: 6 Clinical examination methods)
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
2.3 Sclera (Part of: 2 Anatomical structures in glaucoma)

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