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. 2018 Apr 26;103(2):203–207. doi: 10.1136/bjophthalmol-2018-311846

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Sample nailfold capillaroscopic images of a control (top) and a patient with primary open-angle glaucoma (POAG) (bottom). The blood column voids are located inside the black boxes and the consecutive image sequence frames (0.04 s later) are shown to the right. Blood speed, vessel diameter and blood flow are 709.1 μm/s, 10.1 μm and 57.1 pL/s, respectively, in the given capillary of the control, and 234.4 μm/s, 8.0 μm and 11.6 pL/s, respectively, in the given capillary of the patient with POAG.