(click on the stamp for an enlarged picture)
People who are blind or have low vision use a special white cane for two purposes:
a. to feel obstacles, as well as the curbs when crossing a street, etc.;
thus it "lengthens" one arm.
b. to alert others of the individualís blindness.
Blind people have used a cane as a tool for travel for centuries but it was not until after
World War I that the white cane was introduced.