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Methods of determining the pulse-wave velocity in the optic nerve head circulation by laser speckle flowgraphy (LSFG). The left panel shows a circle defining the area for measurements in the optic disc area. The right panel shows the normalization of one pulse. A = maximum mean blur rate (MBR)—minimum MBR. B = number of frames spent at one-half the value of A. C = number of frames spent at normalized one pulse.
