progression.schell2014 {vfprogression}

Schell 2014 VF progression

Description

progression.schell2014 returns the progression criterion after Schell et al. 2014, which is essentially like CIGTS but with MD, and only one follow-up is enough to confirm progression.

Usage

progression.schell2014(measmatrix)

Arguments

measmatrix

is a data frame. MUST contain the following columns: 'md' (mean deviation) and 'eyeid'. Rows represent the single measurements. The minimum measurements (rows) is 4.

Value

"stable", "worsening", or "improving" of measurements in measmatrix. Note: If a VF series is temporarily improving and temporarily worsening, it is assumed to be "stable" overall

See Also

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4495761/

Examples

data(vf.schell2014)
colnames(vf.schell2014)
progression.schell2014(vf.schell2014)
progression.schell2014(vf.schell2014[vf.schell2014$eyeid == 1,])
progression.schell2014(vf.schell2014[vf.schell2014$eyeid == 2,])