Are You Color Blind?!

Written by Rolf

I myself am not colorblind, but I have long been fascinated by the concept that some people would perceive the world as if they are on LSD. As a little kid, I was proud to get a good result on the Ishihara color perception tests. Yes, I know that's stupid.

Professor Ishihara from Tokyo published a series of plates in 1917 to diagnose color blindness. The Ishihara color perception test was designed to detect red-green color deficiency in people. The test comprises a number of plates, consisting of a bunch of colored circles of different sizes, hidden in which is 1 or 2 digits, represented in dots with a slightly different color tone. The person to be tested should call out the hidden number. If he (or she) is unable to, he is either color blind, or numerically challenged. This test is not ideal for small children obviously.

Ishihara color perception tests

Plate 1 - '12'

Plate 23 - '42'

Plate 9 - '74'

Plate 11 - '6'

Plate 19 - '2'