Tetrachromacy is a rare genetic trait that ... Most people are trichromatic, meaning the three types of cone cells in their eyes are sensitive to three wavelengths of light – red, blue, and ...

On 28 February 2015, an online test for tetrachromacy (a rare condition of a person's having four cone cells in the eye) went viral after being shared on the LinkedIn social media site.

Tetrachromacy is a condition which allows people to see colours invisible to most of us. Almost everyone has three types of cone cells in their retina - which all respond, albeit slightly ...

But the bigger issue that Jordan thinks most true tetrachromats would never need to use their fourth cone cell type, and so would never realize they had special vision. "We now know tetrachromacy ...

When most of us look a buttercup, we simply see yellow. But one artist sees a whole host of extra colours around the flower's edge, because she is a tetrachromat and can see 100 times more hues ...

Concetta Antico has tetrachromacy - meaning she has a fourth colour receptor, or cone cell, in her eyes compared to the normal three receptors. Ms Antico's ability to see the dazzling array of ...

The author's eyes have an extra cone class for color perception ... One of the benefits of tetrachromacy research would be the development of stem cell therapies for the color blind.

The mystery of tetrachromacy: If 12% of women have four ... so-few-of-them-actually-see-more-colours / Humans have three cone cells in their eyes: red cones (L cones), green cones (M cones ...

It is thought that, because two of the cone cells are coded for on the X chromosome, women are more likely to have tetrachromacy then men, but exactly how many people affected is still unknown.

Tetrachromacy is a condition which allows people to see colours invisible to most of us. Almost everyone has three types of cone cells in their retina - which all respond, albeit slightly ...