Canadian currency tactile feature

The feature indicates the banknote denomination in the upper left corner of the face side of the bill using a series of raised dots.

It was suggested by Bruno Thériault, an administrator for the Canadian National Institute for the Blind,[1] and designed by Susan Lederman, a professor of psychology at Queen's University.

The currency denomination must be recognized easily, thus the banknotes use full braille blocks (or cells) of 6 dots, ⟨⠿⟩.

[3][4] A very similar system of tactile raised dots is now being implemented in a new series of notes for the Costa Rican colón.

[5] The tactile feature consists of symbols of six raised dots (two columns of three) separated by a smooth surface.