Three patients with Leber’s Congenital Amaurosis (LCA) that received gene therapy to introduce functional copies of the RPE65 gene in a second eye have reported inprovements in their vision. The patients had received gene therapy in one eye back in 2008 and follow-up treatment to the second eye has proved safe and successful. For more on this story, see www.bbc.co.uk/news/health-16942795.