Librarians as information professionals are involved in the acquisition and processing of information, maintenance of information sources, services and systems and provision of information to end-users demands that they stay up-to-date on trends in the field, as well as participate in discussions of philosophies of service especially in an age heavily influenced by technological changes. Although some researchers such as Brzozwski (2009) and Gruber (2008) have associated work benefits with use of online social networks (OSNs), Hane (2008) and Gaudin (2009) express concern over their use by professionals especially as it affects their job performance.

Job performance is a crucial issue for librarians in university libraries, as they are expected to assist libraries achieve their major objective which is the provision of information for members of the university community (Okere and Onuoha, 2010).

Alternative formats present the visually impaired with the opportunity to read and communicate like sighted persons. These materials are usually not available in quantities desirable to persons with visual impairment. Sighted persons can naturally read and communicate using the types of information materials available such as books, reference sources, serials, internet etc. But for persons with visual impairment, reading and communication comes in alternative formats such as Braille, talking books and large prints. Without alternative formats, persons with visual impairment cannot read and function well as members of the society. This is why it is crucial for every country to have a well organised arrangement for the production and utilisation of information materials by its visually impaired citizens.