Providing Web accessibility for the visually impaired

Web accessibility means ensuring that online content, services or applications can be accessed and used by everyone, including those with special needs. Usability, on the other hand, is a multidimensional concept that depends on the application, the user context and on the goal itself, and its aim is to provide a fully satisfactory user experience. Although closely related, accessibility and usability are frequently addressed as two separate issues. Nevertheless, it is very important to apply them synergistically from the earliest phases of design in order to guarantee satisfactory interaction for users with disabilities.