Question

how was Braille script invented ?​

Answer 1

Braille is a system of touch reading and writing for blind persons in which raised dots represent the letters of the alphabet. It also contains equivalents for punctuation marks and provides symbols to show letter groupings.

Braille is read by moving the hand or hands from left to right along each line. The reading process usually involves both hands, and the index fingers generally do the reading. The average reading speed is about 125 words per minute. But, greater speeds of up to 200 words per minute are possible.