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Central 24 superpixels from the Posterior Pole algorithm of the Spectralis SD-OCT were categorized into three eccentricities according to distance from the fovea. Red superpixels: approximately 1.5° from the foveal center (red circle); green superpixels: approximately 4.5° from the foveal center (green circle); blue superpixels: approximately 7.5° from the foveal center (blue circle).
