Figure 2.

Individual VF assessments for (A) all 11 new referrals (none of whom was believed to have glaucoma), and (B) 11 randomly selected follow-up patients (all with an established diagnosis of glaucoma). In each case, the HFA grey scale is given on the left and the two corresponding Eyecatcher heatmaps are given on the right (NB: Eyecatcher was performed twice). Red markers highlight regions of the HFA where VF loss was greater than the magnitude of the Eyecatcher stimulus (–6 dB). If concordance between the two tests was perfect, then red markers in the HFA should appear as red shaded regions on the Eyecatcher heatmap. Note that new referral ID 9 was non-glaucomatous, but was a cataract patient with a generalised loss of sensitivity across the visual field (MD = −5.6 dB). MD, mean deviation; SAP, standard automated perimetry; VF, visual field.