Guided Progression Analysis (GPA)
Humphrey Field Analyzer II-
i
series User Manual 2660021145640 A
8-18
Figure 8.7b Stable Left Eye – Follow Up
Looking at the Follow-up printout on this page, there are a small number of points flagged on the
Progression Analysis plots C but no GPA Alerts indicating progression D. The flagged points are in
different parts of the visual field except for the point E. Recall that 3 or more points flagged with a
progression triangle on two consecutive tests are required to trigger the “Possible Progression” GPA
Alert. Only one point is highlighted for a second time. The GPA event analysis finds no evidence of
consistent visual field progression, hence a GPA Alert message of “No Progression Detected.”