The Ishihara Colourblind Book 24 Plate is the leading diagnostic tool for identifying various types of colour blindness. This test produces results up to 98.8% accuracy, offering reliable data to assess the severity of your colour vision deficiency. It involves toggling a number of plates with unique patterns, which those with normal colour vision can easily identify, and those with colour blindness have difficulty seeing. Make sure you get a precise diagnosis with this trusted colour blindness test.