Dalton the squirrel monkey treated for color blindness with the image on the left representing vision before treatment (Photo: Neitz Laboratory)
The Cambridge Colour Test uses plates similar to the Ishihara color test shown here
When English chemist John Dalton first wrote about color blindness in 1798, he must have wondered how science would improve the quality of life for people living with the condition. Today, spectacles, contact lenses and revolutionary corrective eye surgery combat the effects of a myriad of vision disorders, yet people with color blindness still live in quiet acceptance of this common genetic disorder. Now researchers have delivered promising results by successfully treating two squirrel moneys with defective color perception using a gene therapy that could also safely eradicate color blindness in humans.
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