Chuck Close suffers from Prosopagnosia, also known as face blindness, he is unable to recognize faces. Painting portraits, helps him to recognize and remember faces. He records minute close up detail. Photographic quality of his work. To create his work Close puts a grid on a photo and on the canvas and copies cell by cell. Each square within the grid is filled with roughly executed regions of color which give the cell a perceived 'average' hue which makes sense from a distance.