At present only a small minority of visually impaired people are proficient in reading. This is due to the
circumstance that the majority of them suffer from loss of sight when they are young, or adult, that is
too late in order to master the Braille reading method, based on the sense of touch.
Learning a foreign language in the traditional way, that is combining spoken and written words,
becomes very difficult or impossible, owing to the fact that the individual can no longer rely on his
ability to manipulate written words (reading /writing).