The Ishihara Color Blindness Test was developed in 1917 Japan by Dr Shinobu Ishihara and is the most well known Color Blindness Test worldwide. The Ishihara Color Blindness Test consists of color dotted plates which show either a number or a path. Available in either 14 Plates; 24 Plates or 38 Plate Books.
The Ishihara Color Blindness Test has 4x different types of tests:
Vanishing - Color Blind People will not see the figure.
Transformation - Color Blind People will see a different figure.
Hidden Digit - Only Color Blind people are able to see the figure.
Classification - Used to determine Red or Green color blindness.