The sensitive Cluster Trend groups visual field defects along nerve fiber bundles and combines high sensitivity with good specificity to detect early glaucomatous changes. Significant cluster worsening is highlighted with red downward arrows. Cluster Analysis is available in both single field and trend view.*
With the global progression analysis for a single eye, you can look at all relevant progression data of one eye on a single screen. This display includes the global trend view of the four indices MD, sLV, DD and LD, as well as the Cluster and Polar Trend Analysis. For a meaningful interpretation of results, unreliable tests can be excluded from the analysis by a simple click on the respective visual field.
The global progression analysis for both eyes shows the trend analysis of the four global indices Mean Defect MD, sLV, Diffuse Defect DD and Local Defect LD. Red downward arrows show significant change at the two significance levels p <5% (unfilled red arrow) and p < 1% (filled red arrow), while the slope indicates the rate of change in dB per year to identify fast progressors. By just looking at the symbols and the slope, visual field progression assessment can be completed in an appropriated time.
The Cluster Trend Analysis is sensitive to detect small local glaucomatous changes. It groups visual field defects along nerve fiber bundles in ten visual field clusters. Red downward arrows show significant cluster change at the two significance levels p <5% (unfilled red arrow) and p < 1% (filled red arrow). The rate of change per cluster in dB per years is shown inside each cluster to detect rapidly progressing clusters.
The Polar Trend Analysis shows single point worsening in the same orientation as a structural result. Red lines indicate the amount of worsening over the selected period.
The Optic Nerve Head (ONH) Projection Analysis combines the sensitivity of the Cluster Analysis with the display of the Polar Analysis for structure-function correlations. All the data is equivalent to that displayed in the Cluster Trend Analysis but shown as OCT segments. Interpretation is made simple: just look for a correlation at the same location in an OCT segment to confirm progression.
