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Researchers from China Developed an Artificial Retina That Partially Restored Vision to Blind Rats by Directly Stimulating the Optic Nerve with Tellurium Nanowires, Opening the Way for a New Treatment for Retinal Blindness.
The experiment was conducted by a multidisciplinary team from Fudan University, Beijing University of Posts and Telecommunications, Shanghai Institute of Technical Physics, and Shaoxin laboratory. The innovation lies in creating a flexible mesh of tellurium nanowires, installed over the damaged retina.
This structure acts as an autonomous phototransducer, capable of converting light into electricity without the need for external batteries. The current generated directly activates the optic nerve, allowing visual signals to reach the brain, promoting partial image perception.
Progress Registered in Tests with Rodents
During the tests, scientists implanted the artificial retina in rodents with induced blindness and monitored their reactions. The results showed that the animals reacted to light again, displaying pupillary reflexes and even recognition of visual patterns.
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The neural signals captured by electrodes indicated a reactivation of activity in the visual cortex, something absent in control groups. The animals’ response to LED light was one of the most consistent indicators of the implant’s effectiveness.
The research also highlighted that these behaviors were not observed in rats without the prosthesis, reinforcing the viability of the method as a real alternative to traditional retinal devices.
Night Vision and Beyond Human Perception
Another promising aspect of the technology is its ability to capture light in the near-infrared spectrum, something beyond the reach of human vision. This raises the possibility of future use to enhance vision in low-light environments.
Such functionality could be applied not only in medicine but also in security contexts, nighttime mobility, and even military operations, offering advantages beyond merely restoring vision.
The idea of an artificial retina that enhances natural visual capabilities might, in the future, alter the very concept of normal vision, going beyond sensory rehabilitation.
Strategic Advancement in the Use of Semiconductor Materials
The choice of tellurium as a key element is one of the technical highlights of the project. This semiconductor has unique photovoltaic properties and is biocompatible, making it ideal for intracorporeal medical applications.
The fact that the device works without external power sources represents a break from traditional prosthetic models, which are generally dependent on electric power and rigid structures, less compatible with ocular tissues.
According to a report published by the portal HDblog, researchers emphasize that although the tests are in the early stages and limited to animal models, the potential of the technology is undeniable and is already attracting attention from the international scientific community.
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