Khaberni - Scientists from Yonsei University in South Korea have developed an innovative artificial retina capable of partially restoring vision for people suffering from degenerative eye diseases.
According to the Tech Xplore website, the new retina operates with two main components: the first is an array of phototransistors that receive near-infrared rays (invisible to the human eye) and convert them into electrical signals, and the second is cylindrical microelectrodes made from liquid metal that transmit these signals to the ganglion cells in the retina responsible for relaying visual information to the brain.
The liquid metal microelectrodes ensure close contact with the retinal cells, which contributes to the efficient transfer of charge and reduces tissue damage due to their smoothness and low Young's modulus.
In experiments, the scientists tested the device on excised retinal tissues and live blind mice, showing high biocompatibility without damaging the tissues. A partial recovery of light sensation was observed in the blind mice, confirmed by behavioral tests and analysis of brain activity.
The researchers say, "In the future, this retina could be used to create a near-infrared visual channel for patients suffering from degenerative blindness caused by damage to the photoreceptors, without affecting any remaining natural vision they have."
The developers of this technology noted that while the initial results are promising, more testing is needed before the technology is ready for clinical application on humans. If successful, the artificial retina could not only restore sight to the blind but also enhance human sensory capabilities by enabling the perception of infrared radiation.
