Original: Though Braille is thought to be the main way blind people read and write, in Britain (for example) out of the reported two-million visually impaired population, it is estimated that only around 15-20 thousand people use Braille.
Simplified: Though braille is thought to be the main way blind people read and write, in Britain (for example) out of the reported 2 million visually impaired population, it is estimated that only around 15-20 thousand people use Braille.