1. A method comprising: generating a graphical user interface for presentation on a user device, wherein the graphical user interface comprises a plurality of image icons, and wherein each image icon comprises at least a portion of a medical photographic image of an example characteristic; receiving a selection of one or more of the image icons; receiving a request for reference information associated with at least one of the selected image icons; and retrieving a first set of reference information from a database based on at least one of the selected image icons, wherein reference information in the database is indexed based at least partially on one or more relationships to one or more of the image icons in the plurality of image icons.