Hong Kong has created a bionic eye with sensitivity better than that of humans. According to researchers, in the future this technology will be used to create prostheses and humanoid robotics. You can read more about this development in the journal Nature.
The bionic eye, created by developers from the Hong Kong University of Science and Technology, has already passed the relevant tests and tests and has shown itself not just on a par with the human eye, but even better. In fact, this device is a three-dimensional artificial retina, which has a very dense array of extremely sensitive to light nanowires. The curved membrane is made of aluminum oxide and equipped with miniature sensors made of perovskite, a photosensitive material that is used in solar cells.
Wires simulating the visual cortex of a brain transmit visual information collected by these sensors to a computer for processing. And nanowires are so sensitive that they can exceed the optical wavelength range of the human eye, allowing the bionic eye to respond to wavelengths of 800 nm, that is, to work on the threshold between visual light and infrared radiation.
This means that the device can see things in the dark when the human eye no longer distinguishes anything. According to the developers, the owner of such an eye will acquire the ability of night vision. Researchers also argue that the eye can respond to changes in light faster than the human eye, allowing it to adapt to changing conditions in less time.
Each square centimeter of artificial retina can accommodate about 460 million nanoscale sensors. Then in the human retina there are approximately 10 million cells per square centimeter.
Now scientists intend to concentrate on being able to connect this bionic eye to the human visual system.