The Humphrey visual field (HVF) test is a standard automated perimetry test that maps central and peripheral vision. It is widely used to diagnose and monitor glaucoma and many neurological and retinal disorders.
Test Procedure
The patient looks into a dome and fixates on a central target while dim lights are presented in different positions.
- Each time a light is seen, the patient presses a button; the machine adjusts stimulus intensity to determine sensitivity.
- Tests are performed one eye at a time and typically take several minutes.
- Reliability indices (false positives, false negatives, fixation losses) help judge test quality.
- Different programmes (for example, 24‑2, 10‑2) sample different regions of the field.
Interpreting Results
HVF printouts show grey‑scale maps and numerical plots of sensitivity loss.
- Glaucoma often produces characteristic arcuate or nasal step defects.
- Neurological lesions may cause altitudinal or hemianopic patterns.
- Serial tests are compared to detect progression or improvement.
- Field results are interpreted alongside OCT and optic nerve findings for comprehensive care.
