The Ishihara Plate test can only signal red-green colour blindness — just because you can decipher the proper numbers on the Ishihara plates does not mean that you have completely normal vision.

A color vision test, also known as the Ishihara color test, measures your ability to tell the difference among colors. If you don’t pass this test, you may have poor color vision, or your doctor ...

Being color blind isn’t black and white. ... This vision issue usually doesn’t make you see things in shades of gray. ... Cambridge color test. This is a lot like the Ishihara test, ...