What is the experience of having a pair of super-powered eyes

  As the old saying goes, “Eyes are the windows of the soul.” People familiar with each other can recognize each other through their eyes. It can be seen that eyes are very important and unique in the five senses. In anime, we often like to show superpowers through our eyes. The golden eyes of “Journey to the West” can see through demons and monsters at a glance; the white eyes of “Naruto” have the ability to see through and see objects from a distance; It is also against the sky, all the things in the world, as long as you have seen it with your own eyes, you can fully understand and use it skillfully.
  There are too many super-powered eyes in art works. What if we can acquire one of these abilities? Let’s start by seeing light that others cannot see.
   Not all, we see
   that we have seen the light radiated from the object actually is an electromagnetic wave, the wavelength range of electromagnetic waves between 0.001 nm to 3000 m, the human eye can see only the wavelength of electromagnetic waves in the range 380 nanometers to 780 nanometers between. For example, if we magnify the longest electromagnetic wave wavelength to the distance between the moon and the earth, the wavelength of human visible light is only between 5 and 10 cm, which is only a very small section. This electromagnetic wave converts the signal through the human eye, and we see the colorful world, but other animals see different light from ours, and their world is also different from ours.
   Rattlesnakes have the habit of going out at night, and their eyes are adapted to this. They can’t see colors during the day, but at night they can see fast-escaping mice. This is because they can distinguish infrared light, that is, they can see the wavelength. Electromagnetic waves that are longer than visible light. The rattlesnake possesses a special sensory tool called a “socket”-a pair of small holes located on both sides of the snout between its eyes and nostrils. The nest device can sense the temperature of the object and the infrared light radiated by it, and then convert the sensed infrared light into a nerve signal. Because the infrared light radiated by different parts of the mouse has different wavelengths, the rattlesnake can see a rattlesnake in the dark. A colorful mouse.
   The squid only has two kinds of photoreceptors, one makes the world in its eyes appear gray, and the other photoreceptor senses polarized light. Normally the natural light we receive comes from all directions, and polarized light refers to a beam of light whose propagation direction is determined. Humans can only see clearly when they wear polarized glasses and filter out the light propagating in other directions. When watching 3D movies The special glasses I wear are for viewing polarized light, and the direction of the polarized light received by the left eye and right eye is exactly perpendicular, so that the left eye and right eye will receive different images respectively, which makes people have a strong three-dimensional feeling. Squid can see polarized light clearly without wearing glasses. They produce polarized light patterns on the body surface to communicate with other squids. These patterns are invisible to other creatures and are their unique way of communication.
   If we can all see
   if the size range of electromagnetic waves can be seen as a strength of the eye visual indicator of the ability of a word, some animal eye vision ability than humans, while others are weaker than humans, but in fact the animals and The eyes that humans have now are the best, because the part of the electromagnetic waves that can be seen is the most useful for survival. It is not a good thing for living things to see all the electromagnetic waves, and it is impossible, because electromagnetic waves of different wavelengths, The energy carried is not the same. The shorter the wavelength of the electromagnetic wave and the higher the energy, it will be harmful to people. Even if it is ultraviolet light, long-term exposure will also cause harm to people. Not to mention X-rays and higher-energy gamma rays, so our eyes are affected. No more. On the contrary, the longer the wavelength of the electromagnetic wave, the lower the energy, which cannot stimulate the visual cells in the human eye, so the human eye cannot see it, only special instruments can detect it.
   If we want to see more electromagnetic waves and ensure clarity, we need a pair of very big eyes and a big head, because only big eyes can ensure that there are enough pixels to process the received electromagnetic waves. The brain can store the converted light signal and analyze it. Perhaps this is the reason why people imagine humans with big eyes and big brains in the future.
   If we can see infrared light radiated by objects, ultraviolet rays from the sun, and WiFi signals all over the world in addition to the visible light that we can see now, then the universe will no longer be pitch black, it will be full of various high-energy rays. All objects with temperature emit infrared light. The higher the temperature, the brighter the infrared light. We can see the temperature of the object at a glance. Maybe we will communicate like this: “Be careful, you see that its’color’ is so dark!” “Today I was so cold that I was so cold that I lost my color.” When we can see ultraviolet light, we no longer need to check money. The machine can check money, and it can also walk around places that radiate ultraviolet rays.
   It’s a pity that all this is just a beautiful imagination. The fact is that if we can see all these electromagnetic waves, we will only be “blinded by light”! Even if we can only see infrared light and ultraviolet light, it is equivalent to seeing electromagnetic waves between 1 mm and 120 meters. That is, we used to only accept light between 5 and 10 centimeters, but now it has expanded thousands of times. When the sun rises, all objects will reflect light, and your world will become a bright spot of light. When the air has a color, its color will also be mixed with other objects. How do you distinguish between a road that only air can pass through, and a wall that cannot pass through?
   There may be some benefits at night. Objects with temperature emit infrared light. At night, they can be as bright as daytime, so we can see objects clearly like a rattlesnake. But I don’t know if you would like to see a colorful person made up of red, green and yellow, or would you like to be a person with a colorful mosaic in the eyes of others?
   In fact, the eyes we have now are the most suitable. After all, this is the result of our adaptation to nature for thousands of years. However, human beings always hope that they can get more. Scientists are studying how to make people see infrared light.
   Get a pair of eye can be achieved
   if we have a pair of infrared eye can see how wonderful! Now, scientists have begun to work in this direction.
   We already know that it is the rod cells that can see things in the dark. The photosensitive pigment in the rod cells is vitamin A. So scientists in the United States thought of a way to do the opposite. They don’t take vitamin A. They only eat vitamin A2, because they believe that vitamin A2 can increase the wavelength that visual cells can absorb more than vitamin A, and extend the range of visible light to infrared light. Participants in the experiment mixed a certain dose of vitamin A2 with nutritional powder, and drank the water brewed with this powder throughout the day to ensure that they did not take any vitamin A. This persisted for 25 days, and the final result showed that their Eyes really respond to infrared light with a wavelength of 950 nanometers.
   Although this experiment has indeed achieved results, there are also great risks, because the lack of vitamin A in the human body will cause night blindness, and this effect may be irreversible. Chinese scientists have found a safer method.
   For human eyes, the energy of infrared light is relatively weak and cannot stimulate the receptors in the eye to generate signals. In order to make human eyes feel infrared light, scientists need to find a material to increase the energy of infrared light, rare earth nanoparticles It is the most suitable material they have found.
   Scientists have used two rare earth elements, erbium and ytterbium, to prepare nanoparticles. In this combination, ytterbium atoms are responsible for absorbing infrared light. The energy of infrared light will cause electrons and photons inside the ytterbium atoms to continuously collide, resulting in a source of non-uniformity. Absolutely undulating energy waves. This energy is transferred to nearby erbium atoms. The erbium atoms have a strong traction force and can gather more energy, and then release them in the form of high-energy green visible light photons. When the photons of the light are caught by the receptors in the eyes, people can see the green light.
   To prove this theory, they conducted experiments on mice. The eyes of mice and humans are similar. They can only sense light with a wavelength between 400 nanometers and 700 nanometers, and cannot see infrared light. But when the scientists injected nanoparticles into the eyes of mice, and then irradiated them with infrared light, they found that the mice had miotic responses to infrared light! The scientists also used infrared light to guide the mice to find the floating board in the pool. The mice with modified eyes responded to the infrared light and could find the hidden floating board. The mice that did not receive the nanoparticle injection were just in the pool. Flop aimlessly in the middle.
   This experiment was successful in mice, but more research is needed to implement it in humans, because its safety and efficiency will take time to test, but the use of rare earth nanomaterials to make visible infrared glasses Maybe it will be a good choice.
   Infrared light can penetrate the human body to places where visible light cannot penetrate and produce therapeutic effects. It can also be used to study how light interacts with our internal organs. If a doctor has a pair of smart eyes that can see infrared light, it will be useful to patients This is good news.