The raised printing that can be felt with the fingers and read that way by people who are blind or visually impaired is called braille.
Braille appears as a system of embossed dots, a tactile language that can be learned by those with limited vision. Books, articles, and letters can all be transcribed into braille by hand or with the help of a braille typewriter. You might see braille printed on elevator buttons, apartment numbers, and in other public places. The writing system gets its name from its inventor, Louis Braille, who developed it at the age of 15.