Figure 2.

The number of locations flagged as progressing by pointwise linear regression are shown after censoring sensitivities below some cutoff CdB to set them equal to CdB. A progressing location was defined as one whose sensitivity decreased at a rate worse than −1 dB/y, with a significance of P < 1%. Analysis was performed using the last six (black) or the last eight (red) visual fields in the series for each eye.