Preliminary research suggests that a small percentage of people can perceive about 100 million colors, as compared with the roughly one million colors most of us can see.

Većina ljudi vide trihromatski, što znači da imaju tri tipa kupastih ćelija uz pomoć kojih vide oko milion boja.

Određene vrste riba, ptica i insekata vide tetrahromatski, tačnije imaju četiri tipa kupastih ćelija što im omogućava da vide sto miliona boja, a ovo je slučaj i kod nekih žena:

Tetrachromacy would likely appear in women with sons or fathers who are colorblind. The genes for the cone cells that process red and green are found on the X chromosome, of which females have two. Tetrachromatic women are believed to carry the genes for three normal cone cell types and one mutant type.

Utvrđivanje ovog stanja je veoma teško, jer osobe sa ovim “poremećajem” retko kada su svesne sopstvene posebnosti, te stanje ostaje nezapaženo jer one jednostavno smatraju da svi ostali vide na isti način kao i one.

Tetrachromatic ‘Super Vision’ May Help Some Women See 100 Million Colors