The Official Ishihara Color Blindness Test developed for color vision testing. Unlike the Ishihara patterns that may be found online and viewed over a computer monitor, this color vision test is designed to produce accurate test results in determining color blindness and the degree of color blindness. Since color reproduction may vary from computer monitor-to-computer monitor, the best and most accurate method of testing for color blindness still comes from official Ishihara album-type books. Unless the computer monitor display administering the test is capable of CRT ICC calibration and regularly degaussed and recalibrated, accurate color and test results may not be possible. Additionally, home printed versions of the test may yield inaccurate results due to variation in ink cartridge color. Printing of Ishihara color tests should only be done on imaging devices accurately calibrated to CMYK or Pantone color charts.

The Official Ishihara Color Blindness Test is accepted by leading authorities as a simple and accurate method for discovering congenital color blindness and red-green blindness in both complete and incomplete forms. Also known as Protanomaly and Deuteranomaly, "red-weakness" and "green-weakness", respectively, are the two most common types of color deficiency. It is said that 1 out of 100 males are subject to "red-weakness" and approximately 5 out of 100 males are subject to "green-weakness". In a test, those suffering from red-weakness fail to see the color red with the same power
( saturation or depth of color ) as a normal observer. It is said that Males, in general, experience color blindness at the rate of 12 in 100 while color blind females reportedly test at a rate of 1 in 200.

With this color blindness test, you will be able to test for not only Protanomaly and Deuteranomaly, but Dichromasy, Protanopia and Deuteranopia. Testing for color blindness is important. The responsibility of a mis-diagnosis should not be taken lightly. Ensure accurate test results by only using quality testing products. This professional color blindness test includes four special plates for tests to determine the kind and degree of defect in color vision. Color plates are encased in specially designed album-type books for ease of handling. Additional test plates can be purchased to enhance the comprehensiveness of the test.

Prof N L Shraman- Treating Colour Blindness with Mind mapping Successfully in India.

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