Thanks to gene therapy, people who could previously only detect shades of grey can now distinguish red objects from a darker background
, achromatopsia disturbs the eyes’ cone cells, which are otherwise responsible for colour vision.
The participants, of whom three were adults and one was 7 years old, all had a version of the condition caused by a single genetic mutation. The researchers therefore hoped that inserting working copies of the faulty gene into cone cells would provide some degree of colourTo test the idea, they injected a virus carrying the correct gene into the subretinal area, home to cone cells, into one eye of each participant.
No major changes were seen in the participants’ vision in the hours after the procedure, but in the months that followed, some reported seeing shades of grey that “glowed” differently to before the injection, says Mckyton.researchers found that the participants could see red objects against dark backgrounds in their treated eye, when they couldn’t see the colour at all beforehand.Get the most essential health and fitness news in your inbox every Saturday.
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