Groundbreaking gene therapy has restored vision to two men with a rare inherited eye disease who were expected to go blind.
Now, scientists hope early intervention with the surgical treatment will halt progression of the devastating disorder, choroideremia, before patients are robbed of their sight.
It is the first time gene therapy has successfully been applied to the light-sensitive photoreceptors of the retina, the digital camera at the back of the eye.
More top news
The contract that set the Beatles on their way to superstardom is to go up for sale for the first time, and could fetch as much as £500,000.
The shortest man ever to have been measured has died aged 75, Guinness World Records has announced.
Britons have stepped forward to offer help to refugees after a photo of a drowned three-year-old boy prompted an outpouring of support.