Blinding diseases lead to permanent vision loss by damaging photoreceptor cells, which humans cannot naturally regenerate. While researchers are working on new methods to replace or regenerate these cells, the crucial question is whether these regenerated photoreceptors can fully restore vision. By studying zebrafish, an animal naturally capable of photoreceptor regeneration, a team showed that regenerated photoreceptors are as good as original ones and regain their normal function, allowing the fish to recover complete vision.
