A bionic eye that allows blind people to read letters and words has been hailed as an "important breakthrough".
People with severe vision impairment due to retinitis pigmentosa are also now able to locate objects, a report by the British Journal of Ophthalmology has shown.
The technology works by turning images taken by a camera into electronic signals that the brain recognises.
Richard Barrett, who has had the implant for four years, told ITV News that being able to locate a salt shaker gave him a "sense of achievement."
ITV News' Faye Barker reports: