These commands can include opening a document, reading documents, navigating web pages, and opening and closing programs. Since most users are not able to navigate with a mouse. As the information on the screen changes, the screen reader informs the braille display to change. A refreshable braille display contains one or more rows of cells and each cell can form the shape of a braille letter. The second way in which the screen reader can provide the information is through an external device known as a refreshable braille display. With this method the screen reader program translates the on-screen information into speech that can be listened to via computer speakers or headphones. There are two ways in which a screen reader can covey information. The user simply uses a different combinations of key stroke commands to instruct the screen reader to read a line of text, a string of text, announce the location of the cursor, read dialog boxes and so on. Users are notified of text, images, buttons, and other elements on the screen. The screen reader converts text into speech or braille.

Blind accessibility screen reader