Before Louis Braille developed the tactile braille system, the most common method of teaching blind students to read was through raised or embossed letter systems. The modern system, called Braille, is similar and consists of raised dots that can be read with the fingertips.
Helen Keller used block printing to write her first letter as this was an easy method for creating individual letters and characters. In 1904, she became the first blind and deaf person to graduate from college. This was no easy task because she needed to learn many different reading and writing methods. This prompted her to write a letter to William Wade at the Perkins School for the Blind: “There is nothing more absurd, I think, than to have five or six different prints for the blind.”
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Source: Good e-Reader
