Fig. 3
From: Calculation of vessel pulse wave velocities in retinal vein segments within the optic disc centre
Top: Plot of the phase of the first harmonic of the fitted harmonic regression model, and the amplitude of the periodic component (HRWA), versus distance along the vessel centre line (origin is the point closest to the centre of the optic disc) for subject D. The least squares line used to compute the PWV is shown in blue while the loess curve is shown in red. Phase values are shown as black dots (see text for details). Bottom: Plot of R-squared adjusted versus Distance (mm). R-squared adjusted is a measure of the goodness of fit of the model18.
