The spherical shape and retina of biological eyes pose a huge challenge to the manufacture of bionic devices. British “Nature” magazine recently published a new study jointly completed by China and the United States, saying that scientists have successfully invented a bionic eye with super night vision.
The research was jointly completed by Fan Zhiyong, a professor in the Department of Electronic and Computer Engineering at the Hong Kong University of Science and Technology, China, and a team from the University of California, Berkeley and Lawrence Berkeley National Laboratory. The researchers embedded a tiny sensor made of perovskite (a photosensitive material used in solar cells) on the curved aluminum oxide film. The visual information collected by the sensor is transmitted to the computer for processing through nanowires that mimic the brain’s visual cortex. . These nanowires are extremely sensitive and can exceed the optical wavelength range of the human eye and respond to 800 nanometer wavelengths (a threshold between visible light and infrared radiation). This means that this kind of bionic eye can still see everything in the dark when we feel that we can’t see our fingers. In addition, the bionic eye responds to instantaneous light changes faster than the human eye, and the time required for “bright adaptation” or “dark adaptation” is extremely short. Not only that, the retina of the new bionic eye can accommodate 460 million nano-sensors per square centimeter (the human retina has only about 10 million cells), so its visual fidelity far exceeds that of the human eye, and it can see in a smaller volume and farther away Objects.
Fan Zhiyong said that the bionic eye is actually a three-dimensional artificial retina, which can help humans obtain super night vision. With the deepening of research, it is expected that one day better visual prostheses will be developed and applied to medical, artificial intelligence and simulated robots. The bionic eye is expected to be put into practical use in 10 years.
To live long without disease, 5 healthy habits must be cultivated in middle age
Researchers from Harvard University School of Public Health, Huazhong University of Science and Technology Tongji Medical School, and Erasmus University in Rotterdam, the Netherlands, found that insisting on adopting a healthy lifestyle (including not smoking, not overweight, and regular exercise, etc.) There are no major diseases (such as cancer, cardiovascular disease and diabetes) associated with increased life expectancy.
The findings of this research published in the British Medical Journal believe that public health policies that improve food quality and urge the public to adopt a healthy lifestyle, and implement strict regulations (such as smoking bans in public places or restricting trans fatty acids in foods) Content), plays a vital role in extending life expectancy, especially life expectancy without important chronic diseases.
The researchers selected 73,196 registered female nurses from the “American Nurses Health Study (NHS)” and 38,366 male participants from the “Health Professional Follow-up Study (HPFS)”. These people had no cancer, Cardiovascular disease and diabetes.
Never smoking, having a healthy weight, engaging in at least 30 minutes of physical activity a day, drinking moderately and eating a high-quality diet, the researchers used the above five low-risk lifestyle factors to calculate the participants’ healthy lifestyle scores. The five scores are added together to get the final low-risk lifestyle score, ranging from 0 to 5. A high score indicates a healthier lifestyle.
During the follow-up period of more than 20 years, the researchers regularly evaluated the participants. During this period, the researchers recorded cases of confirmed and deaths from cancer, cardiovascular disease, and type 2 diabetes.
After adjusting for age, race, family medical history and other potential influencing factors, the analysis showed that women who did not adopt low-risk lifestyle factors had a life expectancy of 24 years without cancer, cardiovascular disease and diabetes at the age of 50; and Women who adopt 4 or 5 low-risk lifestyles have a life expectancy of 34 years without cancer, cardiovascular disease and diabetes at age 50. Similarly, men with unhealthy living habits have a disease-free life expectancy of 24 years at age 50; men who adopt 4 to 5 healthy living habits have a disease-free life expectancy of 31 years at age 50. Men who smoke a lot (more than 15 cigarettes per day) and obese male and female participants (BMI over 30) have the lowest proportion of disease-free life expectancy at age 50 (less than 75%).