There is a reason to hide one eye ... A great combat technique hidden in the "pirate" eye patch (Diamond Online) --Yahoo! News

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　Where does saliva come out? , The mysterious power that controls eye movements, the biggest factor that people die, what is the fart made? , "Deep feeling" is amazing ... The structure of the human body is beautiful and well made. Author who has a total of over 10 million PV and more than 90,000 followers in a total of more than 10 million PV in a surgeon, the story of the great people of medical, the discovery of the great people in the human body, the discovery of viruses and bacteria, and the episode of vaccine development. The "wonderful human body" that introduces unexpected common sense related to modern medicine and conveys the fun of the human body and the depth of medicine. Mr. Toshio Sakai (anatomist, professor at Juntendo University) "The human body is still full of mystery. This book will lead readers into a deep world while providing attractive topics about various knowledge about the human body and medicine." Here are some of the acclaimed content. Click here for the back number of the popular serialization. ● Your horizons are quite narrow now, not only this character, but also a wide range of surroundings. Even if you don't move your eyes, the scenery on the top, down, left and right should be in your eyes. Then, I want you to fix the viewpoint to the characters you are reading now and try to read other characters without moving your eyes. Perhaps you can't read it blurred? And you'll notice that the "range of characters" is very narrow unless you move your gaze. Our horizons are not clearly reflected in every corner, like the view on the TV screen. Knowing the mechanism of the eyes can be clearly understood. Let's compare it to a camera. The lens is equivalent to the lens (the center of the pupil), the lens cap that the squeezed is iris, the film is attached to the retina, and the camera attached to the camera. By the way, the film that covers the white eyes from the back of the upper eyelid and the lower eyelid is called the corneal, and the film that covers the iris is called a cornea. We recognize the scenery because the image reflected on the retina is transmitted to the brain, but it is not actually clear throughout the retina. I look at only one point in the center of the retina. This one point is a point called a macula, and is called the center, the center fossa. The diameter of this part is only $ 3 mm. If you come off a little from here, your eyesight will decrease significantly. Our vision depends on this narrow part. It is hard to notice this because I unconsciously move without gaze and always capture the objects. The retina is lined with cells called visual cells, and the number is more than 100 million in one eye. This cell turns the stimulus of light into a signal and transmits to the brain through nerves. The visual cells have two types of cells: rod cells and pyramidal cells. Each is a name derived from the shape of the cell. "Rod" means "Sao" and "stick", and "pyramids" are forms in which the tip is thinner, such as a conical or square pyramid. Since the rod cells are captured by slightly light, they mainly create the eyesight in the dark place, but the color is not identified. On the other hand, pyramidal cells do not function in dark places, but can recognize colors and shapes, and mainly create visual acuity in bright places. Surprisingly, more than 90 % of the visual cells with more than 100 million are rod cells and about five percent of pyramidal cells. These pyramidal cells are extremely biased to the center fossa, which creates visual acuity in bright places. In addition, the eyesight in a bright place decreases rapidly as the center fossa and the nose side or the ear side are separated. That's why you can read the letters clearly only in the center of the vision. Conversely, if the central fossa is damaged by illness or trauma, the eyesight will drop significantly. It is often said that you should not look at the sun from an early age because you may damage the center of the center. In this case, using glasses will never increase your eyesight. Even if the refractive index is changed depending on the lens, and a statue can be connected to the retinal surface, it cannot be clearly recognized.

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