Figure 7 Contour sensitivity plots obtained in one normal subject (column 1) and in the same three patients described in figures 5, 6, and 10 (columns 2, 3, and 4) under photopic (row 1) and scotopic (row 3) conditions. Three dimensional threshold plots represent values obtained at corresponding retinal locations under photopic (row 2) and scotopic (row 4) conditions. Labelling (x) shows correspondence between the orientation of contour and threshold plots. Abscissa shows retinal location (degrees), ordinate axes show threshold (log units). Three dimensional plots in column 1 show averaged data from 10 (photopic) and eight (scotopic) normal subjects.