Images A and B show wide-field FAF views of a patient with widespread involvement of the retina in STGD. White arrows point to the foveal regions which demonstrate uniform fluorescence bilaterally i.e. relative foveal sparing. SD-OCT image C corresponds with the white dashed line seen in image B through the central macula. The black doubled-headed arrow indicates relative ISOS sparing in the fovea and parafoveal macula. The white double-headed arrows overlie regions of loss of ISOS. Images D and E are the fundus photos correlating with images A and B respectively. The extent of disease and sparing is underestimated by the fundus photos. 165×173mm (72 × 72 DPI)