Figure 1.

Extraction of OCT data from Ganglion Cell Analysis (GCA) deviation maps and 10-2 VF data with and without application of Drasdo displacement, with data from an example participant shown. All data are displayed in right eye and VF format. (A) Averaged color pixel values were extracted from areas enclosed by the small circles. (B) The corresponding 10-2 pattern deviation probability map. Locations were extracted from the grey shaded areas for Drasdo displacement and the blue shaded areas for no displacement. (C) VF data superimposed onto the deviation map, depicting the corresponding VF and OCT locations compared in later analyses. (D) The 10-2 VF clusters, per Choi et al.,²² showing locations over which data were pooled for cluster-based analyses, with cluster 1 being the most central and cluster 3 being most peripheral. Note that comparisons between Drasdo and no displacement could not be performed for cluster 3 as these did not fall within the GCA measurement area with Drasdo displacement.