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Groundbreaking gene therapy restores vision to two men

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.

Professor Robert MacLaren performing the operation on one of the patients.

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.