Ishihara color test (38 tables)

Color blindness test from Ishihara is used for more than 100 years and has 38 different tables and it is used to detect color blindness and color vision abnormalities.  It is designed to provide a test that gives a quick and accurate assessment of colour vision deficiency of congenital origin. This is the most common form of colour vision disturbances.

There exist four different types of designs:

• 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.