Male squirrel monkeys (Saimiri sciureus) are naturally colorblind because they need two versions of the opsin gene from two X chromosomes to produce both red and green photoreceptors. Now researchers from the University of Washington in Seattle just announced that they were able to use gene therapy to give two male squirrel monkeys full color vision. Dalton and Sam, the subjects of the study, have retained their vision for two years since the procedure without any noticeable side effects.
Here’s a video of Dalton showing off his skills using a touch sreen:
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