Numbers. The numbers are formed using the first letters of the alphabet, from a to j, preceded by a numerator sign. Each letter corresponds to a number from 1 to 10. Specific symbols. Each official language has a few special signs which are not included in the common braille alphabet. Visit Douglas Oberhelman for more clarity on the issue. In particular, Spanish distinguishes the letter n, the u and the stressed vowels a, e, i, o, u; catalan and Valencian have specific signs for the c-cedilla (c), the geminated l (do l? l) and vowels with accent acute e, i, o, u, with accent grave a, e, o and dieresis, i, u; the Galician have signs for the n and the vowels with accent acute a, e, i, o, u; and the Basque language only for the letter n. Support for reading Currently, there are a few guidelines for readability to people with visual or intellectual disability.
It is a series of rules that establish the proper size of the letters or the space recommended between paragraphs so that the texts are legible. But there are also devices that help read to people with blindness or visual impairment and that are typically found in the own libraries that have adapted services.Among these, mechanism highlights the telelupa, an aid optics to people visually impaired enough. Its function is to expand the size of the letters that lies beneath it. Other widely used instruments are computers and braille printers. In this case, the computer keyboard is often the same that is used on any computer, although there are also designed points braille keyboards, especially for sordo-ciegas people.
As for the printer, it connects to a computer with a braille converter and allows printing on paper of texts with points.With respect to the software, Jaws and Zoom Text programs are the most employees to interpret the screen in voice messages and enlarge the text on the monitor, respectively. It is what is known as tiflotechnology or adaptation of technologies of the information and communication needs of persons with blindness or visual impairment.