Refractive Surgery Issues
Regarding the previous chapter on the issue of refractive surgery, I saw a comment saying that this novel could easily be regarded as a popular science book.
Yes, it is precisely because of this that I am very cautious when writing the professional part. I will check a large amount of information and literature before starting to write. If I really can't find anything clear, I will ask friends who have learned this kind of professional knowledge.
First of all, before talking about refractive surgery, I want to say that I am not recommending everyone to have refractive surgery, but I emphasize the point of myopia of 700 degrees.
Myopia of more than 700 degrees is severe myopia, which will bring huge troubles to their lives, and will worsen as they age.
This degree of myopia is actually a congenital defect, and to some extent a "disease".
This is just like everyone who has had the experience of reading with a flashlight in the dark, watching the screen against the TV, and staring at the mobile phone for 18 hours. However, some people's vision has always been 1.5, and some people's vision has dropped sharply.
Therefore, myopia is not just due to your failure to protect your eyes.
So let’s talk about the risks that everyone is worried about.
First of all, everything has two sides, and myopia surgery is the same. It has both advantages and risks. When it comes to eye surgery, what everyone is most worried about is blindness.
From a scientific point of view, myopia laser surgery is only performed on the surface of the eyeball. It uses a cold laser to act on the surface of the eyeball. During the surgery, the laser cannot penetrate the cornea and will not enter the eye and damage the eye structure and tissue, so there is no blindness or blindness. risks of.
In addition, some people worry about whether blindness will occur after old age. In fact, it is the same reason. Laser surgery for myopia only improves vision and does not damage the retina of the eye and cause blindness. Blindness mainly occurs in diseases caused by damage to the retina and optic nerve. Surgery It does not touch the inner eye, nor does it change the structure of the eye. Therefore, from the principle of myopia laser surgery, there is no serious harm from myopia laser surgery, let alone blindness.
Finally, there is keratoconus, the so-called most serious complication.
In the literature, the definition of "keratoconus" is that keratoconus is a congenital corneal developmental abnormality characterized by non-inflammatory progressive thinning of the central or paracentral cornea and forward cone-shaped protrusion.
Some patients have autosomal recessive inheritance, usually develop in adolescence and progress slowly. In the early stage, it only shows myopia and astigmatism. As the disease progresses, the cone-shaped bulging of the cornea gradually increases, leading to deepening of myopia and astigmatism. The irregular astigmatism component of the cornea gradually increases, and the corrected visual acuity gradually decreases.
To put it simply, the disease of keratoconus is mostly determined by its own genes. Most of the disease of keratoconus is determined by its own genes. It mainly manifests as progressive thinning in the center of the cornea.
Its incidence rate is about 1/2500. In the general population, 4 to 5 out of 10,000 people may develop keratoconus. It can be seen that keratoconus is a congenital developmental abnormality related to genetic genes. In other words, if a person carries this gene, he will develop the disease regardless of whether he has myopia surgery. Myopia surgery does not cause keratoconus. reason.
Of course, keratoconus can be avoided, and the key to solving this problem lies in preoperative screening and surgical design. Before having myopia surgery, a very comprehensive preoperative examination must be done, especially the anterior segment analyzer, which is very important. Some cases in the early clinical stage and in the latent period can be screened out in time. The sensitivity of screening is so high that Even some normal myopia is excluded from the surgical door.
Therefore, in summary, after strict screening and careful analysis before surgery, the probability of keratoconus is extremely low.
In addition to these relatively basic principles, the data is also a relatively objective statement of facts, so I checked it out.
First of all, everyone should know that any medical behavior, especially surgery, requires repeated medical theoretical demonstrations, animal experiments, volunteer clinical observations, and multiple phases of clinical observations in multiple countries and centers.
Finally, it must be jointly certified by authoritative organizations such as the US FDA, European CE, Japan's Ministry of Health and Welfare, and China's SFDA. Only after approval can it be widely used in clinical practice. The science is rigorous, the demonstration is repeated, and the procedures are complex, leaving no room for error.
Myopia laser surgery also passed these procedures as early as 1995. It is a safe and effective medical technology. Nearly one million myopia patients worldwide receive laser surgery every year. According to incomplete statistics, so far, about 40 million people around the world have received myopia laser surgery, and the average post-surgery satisfaction rate is 95.4%.
In 2009, "Cornea World Literature Report" reviewed and analyzed the quality of life and satisfaction of patients after LASIK in the past 20 years. The patients were aged 18 to 67 years old and had diopters of –22.75 to +7.00D. The article points out that the global average patient satisfaction rate after LASIK surgery is 95.4% (87.2% ~ 100%), the satisfaction rate in the United States is 95.2% (91.4% ~ 100%), and the satisfaction rate in other countries outside the United States is 95.6 % (87.2%~100%). The study counted 1,581 articles from around the world, and 16.3 million people who underwent surgery achieved good visual effects in life.
The results of a retrospective study conducted by Peking Union Medical College Hospital on 26,743 patients (14,691 male eyes, 29,889 female eyes, aged 19 to 57 years old, average 27.2 years old) who underwent myopia laser surgery between 1993 and 2003 are: actual The correction degree was within the expected correction degree error of ±1.00 D, and the quality of life satisfaction reached 98.7%.
Finally, there is of course negative news about refractive technology.
More than ten years ago, due to the huge population of myopia, the demand for myopia surgery market was strong. When myopia surgery was just launched in my country, due to the lax supervision of relevant departments, individual medical institutions, driven by commercial interests, almost did not treat myopia surgery patients. They accept all comers, ignore contraindications, and vigorously promote expensive surgical methods, exaggerating the advantages of laser surgery and avoiding possible problems.
In addition, some institutions, in order to pursue greater profit margins and reduce surgical cost investment, use second-hand equipment, reuse consumables, etc., which still endangers surgical safety from time to time, directly leading to an increased chance of postoperative complications.
But I believe that after so many years of development in the country, medical companies have become more standardized. As long as you find a big hospital, you will receive the best and most formal surgery.
Of course, this chapter represents only my personal opinion. I am willing to believe the information fed back to me by data and science.
After all, it is really difficult to definitely control the truth.
No one knows everything, but when you ask someone who knows, you will worry that they will lie to you.
These days, problems such as unscrupulous doctors and doctor-patient conflicts have directly caused the credibility of doctors’ speech to be lower and lower, but I always believe that most doctors still study this profession because of their love for life.
As for the large amount of negative news... Just like what I wrote about microwave ovens before, the most popular thing about black microwave ovens at that time was gas, and the glasses industry should be the one to take the lead in correcting vision surgeries (personal opinion, personal opinion)
What should I say, don't let the war of interests between industries affect your judgment.
(Don’t worry, this chapter is free, show your heart)