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A quantitative visual field uses automated perimetry to measure light detection thresholds at defined retinal locations. Algorithms adapt stimulus intensity to find sensitivity in decibels and generate probability maps. Serial tests reveal progression or improvement with treatment. The approach standardizes results for comparison across visits and against normative data.
read more about quantitative visual field ...The patient fixates while brief spots of light appear in various positions. Correct responses guide the next stimulus level until a threshold is found. Reliability indices track fixation losses, false positives, and false negatives. Clinicians select appropriate strategies based on the clinical question.
The device adapts stimulus intensity to find the dimmest detectable light at each point. Missed prompts raise the level, and seen prompts lower it. The resulting map highlights functional blind spots. Reliability scores flag distractions or fatigue.
They include grayscale maps, total and pattern deviation plots, mean deviation, and visual field index. Guided progression analysis flags significant change over time. Sector summaries support structure?function comparisons with OCT.
Early after diagnosis, more frequent testing establishes baseline variability. Intervals lengthen once stability is confirmed. Scheduling also depends on risk factors and therapy changes. Comfort and coaching reduce learning effects.
Media opacity, small pupils, fatigue, and poor understanding depress sensitivity. Proper refractive correction and breaks improve performance. Consistent device settings and encouragement help maintain reliability.
Is the test difficult? It is repetitive but manageable with coaching.
Are both eyes tested? Yes, each eye is tested separately.
Can children do it? Older children can, with simplified strategies.
Humphrey Visual Field. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK585112/. Updated 2023.
A Narrative Review of Different Perimetric Methods. Rai BB, et al. PubMed. https://pubmed.ncbi.nlm.nih.gov/38730989/. Published 2024.
Advancements in Visual Field Testing: A Systematic Review of the 24-2C Test Grid. Jin E, et al. PubMed. https://pubmed.ncbi.nlm.nih.gov/40722403/. Published 2025.
Standard automated perimetry for glaucoma and diseases of the retina and visual pathways: Current and future perspectives. Phu J, et al. PubMed. https://pubmed.ncbi.nlm.nih.gov/39413870/. Published January 2025.
Visual Field Examinations for Retinal Diseases: A Narrative Review. Kim KE, Ahn SJ. PubMed. https://pubmed.ncbi.nlm.nih.gov/40806887/. Published July 25, 2025