The ADA (Americans with Disabilities Act) helps remove barriers for people with disabilities. More than 2.5 million Americans suffer from a visual impairment – not just blindness. High contrast ADA compliant signs help ensure accessibility for seniors, the visually impaired and blind. Many (but not all) of these signs incorporate raised text and braille. To learn more about ADA codes and regulations click here.
Braille has provided many blind individuals with the ability to read and write utilizing a tactile system of raised dots. Following is an interesting article that provides a short history of the Braille system of communication that has evolved from a French military combat code to the method in use today as developed by Louis Braille in the mid-1800s. Read more here.