Zeiss Humphrey II-i series - Poor Quality Default Baseline

Humphrey Field Analyzer II- i series User Manual 2660021145640 A
Guided Progression Analysis (GPA)
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GPA Case 4a: Poor Quality Default Baseline
Figure 8.10a Poor Quality Default Baseline
Here is an excellent example of why the doctor should always verify that the chosen Baseline tests
properly represent a stable condition. In the above example, an incorrect Baseline test A was
created when the technician mistakenly tested the patient’s right eye as if it were his left eye. Note
the Blind Spot demarcated on the right-hand side of the visual field in the second Baseline test A.
GPA automatically selected the first and second oldes
t exams to act as the Baseline. The HFA has no
way of recognizing that the second Baseline test was incorrectly saved as a left eye test. Thus, it is
imperative that the doctor check the validity of the Baseline tests prior to making decisions based on
GPA Follow-up findings.
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