Braille was invented by a young man named Louis Braille (1809-1852).
Following an accident, Louis Braille became blind at the age of 5.
Braille is a tactile reading and writing system of raised dots, designed for use by blind or visually impaired people.
The Braille alphabet is a complete reading and writing system comprising 6 dots, arranged in 2 parallel vertical lines of 3 raised dots each. There are as many different combinations as there are letters of the alphabet, punctuation and arithmetic symbols, etc, as well as being in all languages.