STEVE HORRELL / SCIENCE PHOTO LIBRARY STEVE HORRELL / SCIENCE PHOTO LIBRARY
Braille and raised letters on a plastic bleach bottle. Raised letters on a plastic bleach bottle. This enables blind people to read the warning information. The braille writing and reading system was devised by the French teacher Louis Braille (1809-1852), who himself was blinded at the age of three. It is a universally accepted system that enables blind people to have access to written language. It consists of a sequence of cells, each of which contains a pattern of raised dots that can be sensed by touch through the fingers. Different patterns of dots represent letters, numbers, punctuation marks and several short words.
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