Currently, there is no treatment that slows the progression of age-related macular degeneration, which is the leading cause of vision loss in people over 65. An injection of stem cells into the eye may slow or reverse the effects of early-stage age-related disorder that causes vision loss, according to researchers.Age-related macular degeneration occurs when the small central portion of the retina, known as the macula, deteriorates. When animal models with macular degeneration were injected with induced neural progenitor stem cells, which derive from the more commonly known induced pluripotent stem cells, healthy cells began to migrate around the retina and formed a protective layer.This protective layer prevented ongoing degeneration of the vital retinal cells responsible for vision.