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Lenses enable both organizations and individuals to give their stamps of approval to content in the repository, allowing for user-driven quality control of modules and collections. Through these lenses, users can provide their own tags and comments for items in the repository. Lenses can also be used as "bookmarks" within the repository to keep track of related or otherwise interesting content.

A list of all publicly-viewable lenses can be found at Lenses are available in four different forms:

  • Endorsement Lenses - Organizations, such as professional societies, can create endorsement lenses containing content they have carefully reviewed and deem to be of high quality. Organizations use their own criteria for endorsement and are encouraged to describe their selection process on the lens home page. You can view a list of endorsement lenses at
  • Affiliation Lenses - Organizations can also create affiliation lenses identifying content created by members of that organization (but not necessarily reviewed). Though not as rigorous as an endorsement lens, content in an affiliation lens is assumed to be of a quality on par with other members of that organization. You can view a list of affiliation lenses at
  • My Favorites Lens - Each user account has a private My Favorites lens which can be used to keep track of a user's favorite modules and collections. In addition to bookmarking content of personal interest, the My Favorites lens also allows readers to start reading from where they last left off within a bookmarked collection. You can access your personal My Favorites lens by selecting the MyRhaptos tab and clicking on the "My Favorites" link (login required).
  • Member Lists - An account holder can create member list lenses to organize related content, such as to keep track of referenced source materials or to use as a course reading list for students. A list of all public member lists can be found at

All lenses except for the My Favorites lens can either be made privately viewable for personal use only or publicly viewable for anyone to see. The My Favorites lens is always private.

Lens information is shown in a "Lenses" pane appearing on the left hand side of modules and collections. This pane lists the various lenses in which the content being viewed appears. (Figure 1)

Figure 1: "Lenses" pane in module and collection interface.

Clicking on any of the lens links will take you to a page about the lens and the person or organization who created it, as well as all other content selected in the lens. (Figure 2)

Figure 2: Lens page for an individual's lens.

Lens owners can provide a set of one-word tags for content added to a lens as well as comments about the content. These allow lens users to learn more about why the lens owner chose to add this content to the lens; however, these are not to be confused with keywords and summaries, which are provided by the author of the module or collection.

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