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Submission + - Colour-blind monkeys blind no more (scientificamerican.com)

lessthan writes: Two naturally color-blind squirrel monkeys, Dalton and Sam, can now see their food—and the world—in full color, after a decade of study by a husband and wife research team who treated them with gene therapy.

The researchers injected the gene-carrying virus into the monkeys' eyes. In about 20 weeks they attained full color vision and have shown no harmful side effects. Although their vision didn't quite reach that of monkeys born with normal genes, Neitz notes that the weakness might be attributable to the need for improvement on the human end in perfecting the treatment.

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