There are many reasons why a blind person needs to be able to read Braille!
Braille is a system of representing characters and words by patterns of dots. A six dot 'cell' is used giving 63 possible braille symbols, plus space, which is no dots present.
Braille is relatively simple to learn. Such difficulty as may exist relates to sensing the dots by touch. All too often when a person loses their sight no serious attempt is made to introduce them to braille. To the trauma of loss of sight is thus added the further and equally serious handicap of loss of literacy.