Abstract
Artificial retinal implants have the potential to restore some vision to people with degenerative eye diseases, but the technology faces a range of daunting challenges—not least the difficulty of replicating humans’ sensitive color vision. Now researchers led by Hao-Wu Lin at National Tsing Hua University have used perovskites to create a small, flexible device that closely mimics the performance of human photoreceptors (Adv. Mater. 2019, DOI: 10.1002/adma.201900231). Retinal implants have had initial clinical successes. The Argus II, made by Second Sight of Sylmar, California, relies on a video camera mounted on a pair of glasses. The camera transmits visual signals to an implant at the back of the eye, which stimulates retina cells, enabling the wearer to see patterns of light and dark. Some researchers hope to eliminate the bulky glasses and improve the quality of vision by installing light sensors directly into the eye. But these devices need to
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