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The overall average graded foveal location in the subject with the most overall variability (top) and least overall variability (bottom) marked with an asterisk. The coordinates of the overall average foveal location of the most consistent image type, the Mean of the Parallel Detector Image, is marked in each of the 6 images with gray lines. The light or dark spot in the center of the images is a reflection artifact inherent in the GDx instrument.
