He developed the first final code in 1824, at the age of 15. This Braille system was published in 1829, with an inclusion of musical notes too.
The three-year-old pressed quite hard, and the awl suddenly came through the piece of leather, hitting his eye. Despite the best possible treatment, his other eye got infected too, and he became completely blind by the age of five.
The Grade-2 Braille, or the English Braille used today was completely developed in 1905. Most earlier methods used raised prints, but the Braille system was particularly successful as it was designed primarily for fingertip identification, unlike other visual identification symbols.
There are in all 64 Braille cells (each made of 6 dots); different dot patterns and symbols express all alphabets, numerals, punctuation marks, abbreviations, and even mathematical characters, music, and foreign languages.
It used 12 dots - 6 vertical and 2 wide. Too long to be felt by the fingertip at once, Louis Braille improvised on it, and the 6-dot system was born.
A cellist and organist, he published his first book 'Method of Writing Words, Music, and Plain Songs by Means of Dots, for Use by the Blind and Arranged for Them', in 1829, which was made to suit the requirements of any instrument. His works also include 'Little Synopsis of Arithmetic for Beginners' and 'New Method for Representing by Dots ...'.