Comparison of ZETA Fast (PTS) (Optopol Technology) and Humphrey SITA Fast (SFA) (Carl Zeiss Meditec) Perimetric Strategies

Figure 4

Bland–Altman plots for the visual field indices. For each subject, the mean of the measurement from the Zeiss and Optopol machines is taken and plotted on the x-axis. The y-axis is the difference between the Optopol and Zeiss measurements. The plot on (a) is for control subjects; the plot on (b) is for subjects with glaucoma.

(a)

(b)