Transplanted retinal cells can restore some vision in mice with degenerative eye disease, experiments show. The new findings could point the way toward treatments for several forms of progressive blindness, including macular degeneration, which affects an estimated 6 million people nationwide.
For years, researchers have aimed to transplant stem cells to replace light-sensitive rod cells that had degenerated. Rods provide vision in near darkness and are usually the first photoreceptor cells to die in blindness.
Animal experiments, however, have shown limited success, in part because stem cells tend not to develop into rods after transplantation. Mature rod cel