Kowa AP-7000 Manual Do Utilizador
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6.6.14. VFI (Visual Field Index)
The VFI is an index which is conscious of patient’s QOV (Quality of Vision) and shown in units of percentage. It is 100%
when the visual field is normal; it is 0% when the visual field is completely lost. The pattern deviation p–value (total
deviation p–value when MD is –20dB or less) is used to show the result of each examination point in the range of 0 to
100%, weight for each examination point, and then calculate the score into a VFI value.
when the visual field is normal; it is 0% when the visual field is completely lost. The pattern deviation p–value (total
deviation p–value when MD is –20dB or less) is used to show the result of each examination point in the range of 0 to
100%, weight for each examination point, and then calculate the score into a VFI value.
6.6.15. Classification
From the examination result of the center threshold, the degree of glaucomatous visual field disorder is classified into
the following 8 levels.
the following 8 levels.
I/II/IIIa/IIIb/IVa/IVb/IVc/V
As the level goes from the left to the right, the visual field disorder is more advanced.
When “Artifact” of [setting] is ON, the value with “Artifact” considered is shown in [ ]. (P. 60)
When “Artifact” of [setting] is ON, the value with “Artifact” considered is shown in [ ]. (P. 60)
6.6.16. Total of Quadrant/Whole
For 4 quadrants of upper nasal side, lower nasal side, upper ear side, and lower ear side, the total value of thresholds
of each quadrant and the total value of whole thresholds are displayed. Even if no error is found in p–value of the total
deviation or pattern deviation, carefully watching the thresholds allows you, for example, to compare the quadrants of
the upper and lower nasal sides to find a difference, which may imply an early symptom of glaucoma and the like.
When “Artifact” of [setting] is ON, the value with “Artifact” considered is shown in [ ]. (P. 60)
* The point with threshold＜0 is calculated as –2.
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of each quadrant and the total value of whole thresholds are displayed. Even if no error is found in p–value of the total
deviation or pattern deviation, carefully watching the thresholds allows you, for example, to compare the quadrants of
the upper and lower nasal sides to find a difference, which may imply an early symptom of glaucoma and the like.
When “Artifact” of [setting] is ON, the value with “Artifact” considered is shown in [ ]. (P. 60)
* The point with threshold＜0 is calculated as –2.
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Reference book】
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Ophthalmology practice 15 perimeters bunko-do-.
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A Visual Field Index for Calculation of Glaucoma Rate of Progression. Am J Ophthalmol 145:343–353, 2008
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Advanced Glaucoma Intervention Study. 2: Visual field test scoring and reliability. Ophthalmology 101: 1445–1455, 1994
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Gillespie, BW et al : The Collaborative Initial Glaucoma Treatment Study : Baseline Visual Field and Test – Retest
Variability. Invest Ophthalmol Vis Sci 44: 2613–2620, 2003
Variability. Invest Ophthalmol Vis Sci 44: 2613–2620, 2003
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Asman, P et al: Glaucoma Hemifield Test: Automated Visual Field Evaluation. Arch Ophthalmol 110: 812–819, 1992