Colour Blindness (Colour Blind Awareness) : This website shares a plethora of information about the deficiency. Make sure to check out the tabs on the left to learn more about causes, variations, treatment etc.
What is Color Blindness? (American Academy of Ophthalmology) : This website does a great job breaking down color blindness in a comprehendible way. For more information, check out the tabs on the left.
Color Blindness (UXL Science, 2008) : Encyclopedia article provides a basic understanding of color blindness.
“The Science of Color Blindness.” YouTube, Life Noggin, 8 June 2015, www.youtube.com/watch?v=7Apx-mTeLQE.
Example of an Ishihara color test plate. With properly configured computer displays, people with normal vision should see the number "74". Many people who are color blind see it as "21", and those with total color blindness may not see any numbers.
Unknown [Public domain], via Wikimedia Commons
XlinkRecessive.jpg: National Institutes of Healthderivative work: Drsrisenthil [Public domain], via Wikimedia Commons