The loss of photoreceptors, the cells responsible for converting light into neural signals, leads to various types of blindness. However, the ganglion cells, which relay these signals to the brain, often remain functional. Researchers in South Korea have tapped into these remaining cells to not only restore vision but also to provide enhanced capabilities, at least in mice for the moment. They developed a retinal device featuring a matrix of phototransistors that amplify near-infrared light, paired with flexible liquid-metal microelectrodes that send signals directly to the ganglion cells.
With this innovative implant, blind mice started responding to infrared light flashes. Furthermore, sighted mice were able to incorporate the device effectively: they maintained their normal vision while also gaining the ability to perceive infrared light.
Crucially, the device does not disrupt regular eyesight. If only a portion of the retina is compromised, the healthy regions can still process visible light. However, researchers are still investigating how the brain would integrate these two distinct types of visual information.
Currently, the artificial retina is in the prototype stage, featuring a resolution of merely 6×6 pixels and needing an external power source. Before moving forward with human trials, researchers must first establish its safety. Would you be interested in having infrared vision? Many consider it a remarkable addition to human capabilities, while others are content with standard vision.
Informational material. 18+.
