Blindness gene therapy trial: 'I don't trip over things any more'

Researchers in Oxford say they have improved the vision of patients that would otherwise have gone blind.

BBC News reported the start of the trial two years ago - the results of which have now been published in the Lancet.

The so-called gene therapy is for a rare form of blindness called Choroideremia, but the doctors say it could potentially be used to treat the more common form of age-related blindness which affects 300,000 people in the UK and millions across the world.

Jonathan Wyatt was on the verge of losing his sight when he received the treatment two years ago. He told BBC News how his vision has improved.