Stem cell-based retinal implant tested for common cause of vision loss - https://www.technology.org/2018/04/05/stem-cell-based-retinal-implant-tested-for-common-cause-of-vision-loss/ https://www.technology.org/texorgwp/wp-content/uploads/2018/04/retinal-pigment-epithelial-web-412x266-400x258.jpg