Question

What is the braille system? how it helps the visually impaired?

Answer 1

it is a kind of system in which letter are recognised by a board embedded with several nails which are organized in such a way that it forms a letter
many visually impaired people are able to read and learn through it because it is easy and cheap

Answer 2

braille system helps for visually impaired. It contains braille alphabet. The braille alphabets are helpful for visually impaired.