Pulse Waveform Analysis of the Ocular Blood Flow Using Laser Speckle Flowgraphy before and after Glaucoma Treatment

Figure 1

Analysis of pulse waveforms for the optic nerve head (ONH) using laser speckle flowgraphy (LSFG). (a) Representative color-coded composite map. By this circle rubber band at the ONH, the mean blur rate (MBR) and other waveform parameters can be measured. (b) Pulse wave showing changes in the MBR, which is tuned to the cardiac cycle for 4 s (the total number of frames is 118 in a scan). (c) The change in the MBR in one heartbeat. (d) (1) A fundus photograph showing the ONH. (2) The MBR for ONH is automatically calculated. (3) Vessel extraction function automatically detected vessel and tissue areas within the ONH. The black area represents the tissue area, while the white area represents the vessel area.

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