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People with severe vision impairment due to retinitis pigmentosa are able to read letters and words with the help of a retinal implant, a report by the British Journal of Ophthalmology has shown.
Richard Barrett, who has had the implant for nearly four years, told ITV News he can "perceive certain objects" but not tell the difference between a knife and fork.
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A bionic eye that allows blind people to read letters and words has been hailed as an "important breakthrough".