Figure Legend: From: Eidolons: Novel stimuli for vision research Journal of Vision. 2017;17(2):7. doi:10.1167/17.2.7 Figure Legend: Comparison of an eidolon (obtained with fully coherent disarray and 0.5 reach) and a mongrel (seed corrupted with high-passed noise). Even if the two instances look relatively similar, some qualitative differences are evident, such as the fact that features (e.g., edges) can appear or be enhanced at random positions in the mongrel image, whereas each feature can be traced to the fiducial image in the eidolon. Photograph of Albert Einstein reprinted from http://www.loc.gov/pictures/item/2004671908/. Copyright Orren Jack Turner. Date of download: 10/16/2017 The Association for Research in Vision and Ophthalmology Copyright © 2017. All rights reserved.