Dr Forbes said: “The men [in the study] were treated in one eye, and what we showed is that in various different aspects of their vision — in particular in dim light, there appears to be an improvement in their ability to see.
“One of the big problems with this disease […] is that early in the disease, as people start to go blind, they can’t see in the dark. It gets progressively bad and they eventually go blind.”
However, she added, “the patients that we’ve treated, some of them were able to do things like navigate through a maze more rapidly, they reported that they could see better in dark conditions.
“And when we measured the sensitivity of their retinas, they appeared to have an increase.
“All of those things together suggest that replacing this gene has a benefit for those patients who are missing it.”
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Article source: https://www.express.co.uk/news/science/1659838/blindness-uk-gene-therapy-meiragtx-inherited-eye-disease-shoreditch-london