Benefits and risks
When NICE looked at the evidence, it decided that there was not enough evidence to know how well this procedure works or how safe it is. The 7 studies that NICE looked at involved a total of 129 patients but some patients may have taken part in more than 1 study.
Generally, the studies showed small improvements in vision. Some people were better able to recognise objects, light, or direction of movement.
The studies showed that the risks of the procedure included:
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damage to the retina during or after the procedure, that needed more surgery to repair
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the staples holding the implant in place needing replacing within a few days of the procedure
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problems with the conjunctiva (a thin membrane that covers the white part of the eye) after the procedure, that were successfully treated
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infection in the eye, that was treated with antibiotics
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low pressure in the eye that needed more surgery. 1 person had to have the implant removed.
If you want to know more about the studies, see the guidance. Ask your health professional to explain anything you don't understand.