Performance of the Visual Field Index in Glaucoma Patients With Moderately Advanced Visual Field Loss

Rates of Glaucomatous Visual Field Change in a Large Clinical Population

“…27 We elected to use MD and not the Visual Field Index (VFI), 28 because of the ceiling effect in the VFI and potential loss of sensitivity due to its reliance on pattern deviation values. 29 Furthermore, because the VFI resorts to total deviation when MD is approximately À20 dB, there are abrupt changes in its value, 30,31 rendering it less appropriate for computing the rate of visual field loss.…”

How to detect progression in glaucoma

“…This suggests that the VFI is likely insensitive for detecting early visual field loss. Additionally, due to the change in the VFI algorithm, in visual field series in which MD crosses À20 dB, there is a stepwise worsening in VFI and an increase in its variability, reducing the reliability of VFI in these cases (Lee et al, 2014;Rao et al, 2013; Fig. 1).…”

The Fast Component of Visual Field Decay Rate Correlates With Disc Rim Area Change Throughout the Entire Range of Glaucomatous Damage

“…47 We found that some evidence suggested that VFI may be associated with structural change in the moderate/advanced glaucoma group. However, Lee et al 48 reported that the VFI becomes highly variable in advanced glaucoma, because of the change from the use of the pattern deviation probability value to the total deviation probability value in calculations of VFI at or below À20 dB of MD. Mean deviation rate, VFI rate, and FC rate were significantly worse in the more advanced groups.…”