Tetrachromacy:
Rich Lee, a biohacker in Utah who is colour-blind, says he wants to use Zayner’s kit to not only cure his colour blindness, but take his eyesight to the next level. He wants to see into the ultraviolet spectrum, a rare genetic mutation called tetrachromacy that is sometimes found in women. [“Biohackers are using CRISPR on their DNA and we can’t stop it,” Alex Pearlman, NewScientist (18 November 2017, paywall)]
