Humphrey Zeiss Field Analyzer 850

Guided Progression Analysis (GPA) provides an overview of
the patient’s entire visual field history, streamlines workflow and
can improve clinical confidence.
GPA simplifies and standardizes analysis of changes in
glaucomatous visual fields. It highlights any changes from
baseline that represent larger than expected clinical variability
and provides plain-language messages whenever changes show
consistent and statistically significant loss.

Maximum temporal range (degrees) 90
Stimulus duration 200 ms
Visual field testing distance 30 cm
Background illumination 31.5 ASB