Wireless eye implant helps blind patients read again
Mar 9th 2026
A tiny wireless retinal implant restored enough central detail for many older adults with advanced macular degeneration to read letters and short words in a European trial. The PRIMA chip improved acuity on average but brought surgical risks, limited scope, and the need for ongoing rehab and headset use.
- In the PRIMAvera trial of 38 volunteers, 32 completed follow-up and 26 showed meaningful vision improvements.
- Participants gained on average 25 letters on a standard eye chart, roughly five lines of vision.
- The PRIMA implant is a 2 mm photovoltaic chip placed under the retina and works with specialized glasses that wirelessly project images to the device.
- Twenty-seven participants used the artificial central vision at home to read numbers or short words, showing real-world benefit for some daily tasks.
- The restored sight is limited to artificial central detail, requires the headset to be active, and often needs training plus head scanning to use effectively.
- Safety data recorded 26 serious adverse events in 19 participants, mostly within two months of surgery, with most resolving within two months and investigators attributing many to the procedure.
- The trial had no sham control, long-term durability and broader functions like face recognition or driving remain unproven, and regulators in Europe and the U.S. are still evaluating approval paths.