May 24, 2013
Most people can see a pretty wide range of colours – about a million hues, according to scientists.
We perceive all those gradations in colour using cells in our eyes called “cones”. Most people have three cones, making us “trichromats”. People with colour blindness have only two cones that function normally, so they’re called “dichromats”.
Now, a scientist in Newcastle, England has apparently discovered a woman who can see 99 million more colours than the average person. Her ability to perceive all those colours is extremely rare.
She’s a tetrachromat, with four cone cells in her eyes, and she’s able to see many colours that haven’t even been named, since trichromats can’t perceive them.