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A rapid, threshold-estimating test designed to quickly survey the entire peripheral visual field to detect any major or obvious areas of vision loss (scotomas). It is a pass/fail test.
read more about screening visual field test ...It is distinct from a Full Threshold Visual Field Test, which measures the exact minimum amount of light detected at specific points. A screening test is faster and less detailed.
Typically used as part of a routine, comprehensive eye examination to quickly identify patients who require more detailed, time-consuming diagnostic visual field testing.
The most common instrument is the automated perimeter (like Humphrey or Octopus), often using the supra-threshold testing method where stimuli are presented slightly brighter than expected.
A false positive occurs when the patient presses the response button when no stimulus was actually presented, suggesting an unreliable or over-anxious patient.
It primarily screens for conditions that cause peripheral vision loss, such as glaucoma, optic nerve disease, and neurological pathway damage (e.g., stroke or tumors).
A screening test is very fast, often taking only 3 to 5 minutes per eye, compared to 10-15 minutes for a full diagnostic test.