3D model of human primary visual cortex. Left: a view of stimuli in one display with fixation on a stimulus shown at center of a polar coordinate grid. Right: the same stimuli have been plotted on the surface of the model, showing the dramatic effects of cortical magnification. The fovea is located at the left tip of the model, and the hemifields have been seamlessly joined. Millimeter scaling is shown at cuts through the model, rather than distances along the surface. Credit: Brad Motter and Diglio A. Simoni, Veterans Affairs Medical Center in Syracuse