http://www.trishir.com
The designs and shapes enable simplified testing of children and those with cognitive conditions where identification of numbers may not be possible.
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 / colour 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.
Best to test colour blidness even at home.
