South Korea’s 3D-bioprinted retina breakthrough pushes the frontier of restoring sight closer to reality. Researchers at POSTECH and partner institutions have created a 3D-bioprinted retina-on-a-chip containing vascular and neural layers, using specialized retinal bioink. The model can reproduce retinal vein occlusion, a serious condition that can cause irreversible blindness. The achievement is remarkable, but the viral claim goes further than the published science: the team has not printed an entire living human eye and implanted it into a blind patient. What they’ve built is a sophisticated retinal disease model that could accelerate treatments for conditions that currently have no way to fully restore damaged retinal tissue. It’s still a major glimpse of where regenerative eye medicine could be heading.