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This module describes what a Lens on Connexions is, how authors may use them to highlight certain content, and how instructors or learners may use them to find quality content.

What is a lens?

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 under the Lenses tab. 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.
  • 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.
  • 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 MyCNX 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.

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.

Using lenses

Clicking on the name of a lens will take you to its lens page , which includes information about the lens (and the organization, if the lens was created by an organization), a listing of all the content within that lens, and a tags portlet on the left side of the page.

Example of an organizational lens page.
Lens page for an individual's lens.

Notice the content selected by this lens is displayed like the results of a search. This is useful, because you have access to all the sorting , filtering, and pagination options for any search return listing on Connexions. The "Detail" view will display the lens creator's comments for each of the selected content.


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.

The Tags portlet displays a cloud of the tags used within this lens, with each tag sized relative to the number of times it is used. Click on a tag in the Tags portlet to filter the lens page to only show content associated with that tag. Tags here have a lens-wide scope, as opposed to the Tags portlet on the "Viewing Content" page, which will search the repository for all content in all lenses associated with this tag.

Tags portlet.
Tags portlet on the lens page.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Connexions tutorial and reference. OpenStax CNX. Feb 23, 2012 Download for free at http://cnx.org/content/col10151/1.27
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