Perimetry is a diagnostic test that measures the entire area a person can see — known as
the visual field — including peripheral (side) vision. The Humphrey Field Analyzer (HFA) is
the gold standard in automated perimetry and is widely used worldwide for detecting and
monitoring glaucoma and other neurological or retinal disorders.
HFA testing provides a precise, computer-generated map of the visual field, enabling early detection of vision loss that might not be noticed during daily activities.
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