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Ishihara Color Vision Test Book of 38 Plates with User Manual - INDIA, PR-COM-RT-X1072279 INDIA PR-COM-RT-X1072279 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.

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