Online Testing

• There are many websites offering online testing for color blindess. According to Color Vision Testing, these tests can be effective for establishing that a person is (or is not) color blind; however, because computer monitor colors can vary, the tests are better suited for screening and not diagnosing. If you believe you are color blind, you should visit an eye doctor.
  
  

Isihara Plates

• One type of colorblind test usually found online is the Ishihara Plates test. This test involves an image made out of a series of colorful circles. Within the circle is an image, such as a number, that only a person with regular eyesight will be able to see. If you cannot see the image, you are most likely color blind. Sample tests can be found by searching for Ishihara Plates color blind testing on any search engine.
  
  

City University Dynamic Colour Vision Test

• The City University Dynamic Colour Vision Test was developed by Professor John L. Barbur from the City University London as a computer color vision test. Based on the same principles as the Ishihara test, Barbur's test can also be found by searching online with any search engine.
  
  

Color Blindness Test

• A color blindness test, available at www.biyee.net is based on the Confusion Lines of the CIE 1931 Color Space. This particular test can provide you with more insight into which specific color deficiency you may have.