Product Description

ISHIHARA BOOK 38 PLATES

• Dr Shinobu Ishihara introduced in 1917—almost 100 years ago—the most well known color blindness test.
• Our Ishihara Color Blindness Test book are perfect for testing the color deficiency.
• Every single color test plate of our 38 plates Ishihara Color Blindness Test charts is precisely printed to measure accurately.
• There exist four different types of plates:
  • Vanishing design: Only people with good color vision can see the sign. If you are colorblind you won’t see anything.
  • Transformation design: Color blind people will see a different sign than people with no color vision handicap.
  • Hidden digit design: Only colorblind people are able to spot the sign. If you have perfect color vision, you won’t be able to see it.
  • Classification design: This is used to differentiate between red- and green-blind persons. The vanishing design is used on either side of the plate, one side for deutan defects an the other for protans.

If you can see all of them you are definitely color abnormal, as some of them should only be seen by colorblind people and others only by non-colorblind ones

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