I feel that many people actually lack a basic understanding of this procedure, and some of the problems are not directly related to a lack of profound expertise. Instead of using very specialized terminology to describe the so-called laser myopia correction surgery, I will just give an easy-to-understand analogy so that the general public can quickly understand it. The surgery uses a laser to thin the human cornea, commonly known as the center of the black eye, and the effect is equivalent to a reduction in the degree of myopia. The main reason why a laser is used instead of a blade is that the former can control the depth of the cut more precisely than the latter, and the damage is less, and the surface of the cut is neat, equivalent to using a fast knife to cut tofu, and the surface and edges will be smooth and neat. We know that the laser shines on the surface of the eye as a point of light, about how this point of light of the laser “cut” the cornea, let’s draw an analogy, when the stonemason carves on the stone, he uses a chisel, one point to chisel, countless points will become a piece, the stone will remove a layer, the laser is the same, except that the laser point is very small, invisible to the naked eye, dense. The laser is also the same, except that the laser dots are very small, invisible to the naked eye, densely packed, and eventually connected into a piece, the cornea is also cut off a thin layer, the problem is that too much can not be cut off, otherwise, the eye will not be broken. Some people have concerns about the thinning itself, which is justifiable, because, after the cornea is thinned, the strength of the cornea itself is discounted, which is like buying a new house, bought a rough house, usually need a basic renovation before moving in, which is also the actual need, but if you always feel that the simple basic decoration is not enjoyable, you must come to a new type of innovation, so, smashing the The bearing wall, the new decoration, looks very beautiful, but, one of the most damaging problems came out – the strength of the house at the same time was also discounted, if encountered with an earthquake, may be a problem, so patients who have done this kind of surgery, should pay special attention to eye protection, beware of eye injuries, rubbing the eyes is actually a certain risk. During the surgery, the “black eye” is lifted up to a very thin flap, and after the surgery, this flap is “covered” back, or is pasted back, originally one piece of tissue, was cut open and then closed, the strength is naturally not as strong as the original one when This is also easy to understand, people who have driven cars know that once the tires are punctured, go to the 4S point to fill the tires, although the car can still drive, but you will often be told, try not to run long distance on the highway, if you have to run long distance, it is best to replace the tires with new tires, the reasoning is also the same. In addition, there is another long-term hazard that the general public does not know much about. Many of us are prone to cataracts in our old age, which is a disease that requires surgery. At this point, you should understand that after laser surgery, the cornea has been “renovated” and is no longer “pristine”, so this measurement related to the IOL is bound to be disturbed, and the result is a deviation in the measured IOL. Although there are many methods of correction in modern measurement, the deviation cannot be eliminated. Some people may still be confused as to why so many people are so enthusiastic about this procedure and why they are able to achieve 1.0 vision after the procedure. Before explaining this doubt, first of all, we need to clarify a basic concept, the quality of human vision does not simply include a visual acuity, a person is comfortable to see objects or targets, 1.0 visual acuity is not enough, visual quality also includes such optical factors as color vision, dispersion, aberration, etc., but in daily life, these factors are not as easy to measure as the simple visual acuity, often ignored. On the contrary, these factors are important and necessary to ensure the quality of your vision, and any one of them can cause visual discomfort. For normal eyes, these factors are generally within the normal range, just like a new machine or equipment, its operating parameters are pre-set and the interrelationship between the parameters is matched and coordinated, basically in the best condition to ensure that you can have normal quality of vision. However, after laser surgery, the balance between the various factors is broken, and although the improvement of vision is highlighted, other factors are not taken into account, and the problem will naturally follow. It is like a biased student, who only pursues a single subject grade, but the other courses are all in a mess, and will certainly encounter great trouble when they finally go to the society to seek employment. More annoying is that these symptoms of discomfort, often your own subjective feeling is very strong, to the doctor, the general eye examination but can not find out what obvious signs, so the situation is often, you repeatedly look for running various hospitals, always can not get a son or daughter, so that we are very annoyed.