Braille is a system of communication for those who are blind or who have severe low vision. It is a system of raised dots which represent letters and numbers. Braille takes its name from its creator, Louis Braille. Louis, born in France in 1809, lost his sight at age three, the result of an accident. At the age of fifteen, he had completed an alphabet consisting of raised dots in groups of six.
The Braille alphabet is formed within a Braille cell. A Braille cell is a group of six dots. Braille letters are made by raising one or more dots in the cell. The six dot positions within the cell are numbered and referred to as dot 1, dot 2, dot 3, dot 4, dot 5, and dot 6.
Source: WBU & ICEVI. (2016). Joint position statement: Braille literacy. Available from http://icevi.org