That's not true, actually. Tetrachromats see the same range of electromagnetic w...

frosted-flakes on April 2, 2019 | parent | context | favorite | on: The Difference Between ‘Violet’ and ‘Purple’ (2015...

That's not true, actually. Tetrachromats see the same range of electromagnetic wavelengths as everyone else—there's just an extra cone in there that's mostly useless. There's a great video on YouTube called Tetrachromats Don't Have Superpowers that explains it quite well: https://youtu.be/fDoAs0qN7lU

OscarCunningham on April 2, 2019 [–]

Lots of animals have the useful form of tetrachromacy though.