From Mail Online:
It was only in 2012 that she was found to possess the genotype for tetrachromacy and she has been studied by the University of California, Irvine. Experts said that differences in color perception are hard to detect because they are small and tests are not designed for more than three pigments – blue, red and green.

For the full story, please visit http://www.dailymail.co.uk/sciencetech/article-2796992/the-woman-rainbow-vision-artist-sees-100-times-colours-average-person-genetic-condition.html.

 

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