Clinical researchers reported that a wireless subretinal implant (PRIMA) restored functional central vision in patients with late‑stage geographic atrophy from age‑related macular degeneration. In a one‑year study led by Dr. Jose‑Alain Sahel and collaborators at the University of Pittsburgh, participants gained an average of 25 letters on standard eye charts and many used the device at home for reading numbers and short words. The device substitutes photovoltaic pixels for lost photoreceptors and requires intact inner retinal circuitry; investigators note the restored vision is device‑dependent and limited to central detail.