\n<\/p>\n
An electronic eye implant half the thickness of a human hair has helped people with incurable sight loss to see again, opening up a potential \u201cnew era\u201d in tackling blindness.<\/p>\n
Doctors who implanted the sim card-shaped prosthetic devices say they have helped many of the 38 elderly patients in the trial regain their ability to read letters, numbers and words.<\/p>\n
\u201cIn the history of artificial vision, this represents a new era, said Mahi Muqit, a senior consultant at Moorfields eye hospital in London, one of the 17 sites involved.<\/p>\n
\u201cBlind patients are actually able to have meaningful central vision restoration, which has never been done before. Getting back the ability to read is a major improvement in their quality of life, lifts their mood and helps to restore their confidence and independence.\u201d<\/p>\n
The trial found 84% of participants were once again able to read letters, numbers and words after being fitted with the implant, called the Prima device.<\/p>\n
Eye specialists hailed the results as \u201cremarkable\u201d and said the device could help people with the \u201cdry\u201d form of age-related macular degeneration (AMD), the leading cause of sight loss in the over-50s.<\/p>\n
Moorfields said: \u201cThe revolutionary new implant is the first ever device to enable people to read letters, numbers and words through an eye that had lost its sight.\u201d<\/p>\n
The 38 patients all had geographic atrophy with dry AMD, which over time progressively deprives someone of their sight and for which there is no treatment. Most people with the condition lose some of their central vision and in some cases it progresses to full sight loss as the cells in the macula die and the central macula melts away.<\/p>\n
All had lost their central vision and had only limited peripheral vision before they had the device implanted in an operation lasting less then two hours. Five were treated at Moorfields and the others at hospitals in Germany, France, Italy and the Netherlands.<\/p>\n
Sheila Wilson from Wiltshire, one of those who had the chip implanted at Moorfields, said: \u201cBefore receiving the implant it was like having two black discs in my eyes, with the outside distorted. I was an avid bookworm and I wanted that back. There was no pain during the operation but you\u2019re still aware of what\u2019s happening.<\/p>\n
\u201cIt\u2019s made a big difference. It\u2019s a new way of looking through your eyes and it was dead exciting when I began seeing a letter. It\u2019s not simple, learning to read again, but the more hours I put in, the more I pick up.\u201d<\/p>\n
The Prima device, a super-thin microchip that is just 2mm by 2mm in size, is inserted under the centre of the eye\u2019s retina in a procedure known as a vitrectomy.<\/p>\n
To help them to see and write, patients were given augmented reality glasses containing a video camera connected to a small computer, which they attached to their waistband. It included a zoom feature to make text bigger and easier to read.<\/p>\n
Patients can use the glasses to focus and scan the object in the projected image that they want to read. The glasses project the scenes as an infra-red beam across the chip, which activates the device. Artificial intelligence in the waistband computer processes the information and converts it into an electrical signal, which passes through the cells in the retina and optical nerve into the brain.<\/p>\n
Muqit stressed that patients had to undergo training and intensive rehabilitation of their eye in order to realise the benefits of the technology.<\/p>\n
\u201cIt\u2019s not like you\u2019re popping a chip in the eye and then you can see again. You need to learn to use this type of vision,\u201d he said.<\/p>\n
The results of the trial are reported in the New England Journal of Medicine.<\/p>\n","protected":false},"excerpt":{"rendered":"
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