If your eyes are more or less like most people’s; you can only see about one million colors. Which does seem like a lot...until you compare it to the 100 million colors that can be perceived by one English woman. You see, our powers of color vision come from cells in our eyes called cones. There are three types in all, and each is triggered by different wave lengths of light.
However, some people have four cones, which scientists like neuroscientist Gabriele Jordon predicted, could mean that they have the ability to see more colors. To test this hypothesis, Jordon and her team constructed a test where three circles flashed on a screen. To a normal person, they’d all appear the same. Only a person with “supervision” could distinguish between the three.
Jordon gave the test to 25 women who all had a fourth cone. One of these women, code named cDA29, got every single question correct. While we can never truly know what this women sees, according to Jordon’s theory, her eyes are in ultra-HD.