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In 1917 Dr. Shinobu Ishihara invented the Ishihara Color Perception Test, a way to decipher if a person is likely to be colorblind. Disjointed bundles of polka dots form numbers and lines, only visible if you can differentiate certain similar hues from one another. This simple yet incredibly accurate test is still used today.
This video tests how many numbers you can accurately identify and this in turn deciphers whether you are very likely to be colorblind or not. How many did you get correctly? Tell us in the comments below!