Jeremy M Wolfe1,2. 1. Ophthalmology & Radiology, Harvard Medical School, Boston, MA, USA. jwolfe@bwh.harvard.edu. 2. Visual Attention Lab, Department of Surgery, Brigham & Women's Hospital, 65 Landsdowne St, 4th Floor, Cambridge, MA, 02139, USA. jwolfe@bwh.harvard.edu.