None of them were short-sighted and could walk out of the barbershop with a smile.
As soon as you put on your glasses...
If you accidentally forget to take your glasses out, it is simply five meters away from six relatives do not recognize, ten meters away from male and female do not distinguish, thirty meters outside the animal is not distinguished.
It is said that the eyes are the windows of the mind, but the myopic people, the eyes are loaded with "frosted glass".
For many people, wearing glasses is inconvenient, but also may seal the value of the face, wear contact lenses and it is often uncomfortable, there are still eye health hazards, so they moved the idea of doing myopia surgery, but they did not make up their minds for a long time, and the tangled points including but not limited to -
How is myopia surgery done? Does it hurt? Which is best for me? Is it risky? Will it bounce back?
Don't worry, we went to the hospital to take pictures of the whole process of volunteer laser myopia surgery, and took you to "painless experience".
Image credit: Permissioned shooting
First of all, no matter what kind of surgery, a detailed eye examination should be carried out before surgery, in addition to basic refraction, corneal topographic map, corneal thickness detection, according to different personal conditions, corneal morphological analysis, dry eye examination, endothelial cell examination, eye axis measurement and other tests, preoperative examination as many as dozens of items.
Image credit: Permissioned shooting
The whole process of laser myopia surgery is recorded
Simply put, laser myopia surgery is to use a laser to thin the cornea a little. The higher the degree, the thicker the cornea that needs to be cut, which is why this type of surgery requires the cornea to reach a certain thickness.
Image source: Do it yourself
At present, the mainstream surgical methods of laser surgery are half femtoseconds, full femtoseconds, etc.
In the case of full femtosecond surgery, for example, the first step is to put on an isolation suit, isolation cap, and shoe cover and lie on the operating table.
Image credit: Permissioned shooting
The nurse will then disinfect your eyes and inject anesthesia eye drops into your eyes, so that after anesthesia, there will be little pain during the operation. Next, the doctor will use a small device to break your eyelids.
Image credit: Permissioned shooting
Everything is ready. At this time, you have to stay relaxed and look in the direction of the bright light above, and then the instrument will slowly descend close to the eyeball.
Image credit: Permissioned shooting
When a green dot of light appears, the doctor will tell you to keep an eye on the spot and let the eyeball locate, and then the instrument will suck the eyeball.
Image source: Instrument video
In 30 seconds, the laser scans the inside of the cornea across the surface of the cornea and cuts a small piece of "lenticular corneal tissue" with a small opening on the surface.
After doing these jobs, the instrument releases your eyeballs and slowly leaves you. The doctor then uses a tool to extract the cut corneal tissue.
Image credit: Permissioned shooting
At this point, the full femtosecond surgery is complete, and the overall time is about 10 minutes.
Another commonly used laser procedure is called "half-femtoseconds". Listening to the name, it seems to be a low-end version of the full femtosecond, but it is not so, and the main difference between the two is the difference in the surgical method.
In addition to femtosecond lasers, excimer lasers are also used.
Both lasers have their own advantages, femtosecond laser cutting tissue edges are smooth and smooth, can also cut directly through the surface layer in the interior, and excimer lasers can "customize" the cutting method according to the personal cornea situation to ensure postoperative cornea smoothness.
Image source: Dr. Lilac
The preparation for surgery is similar, but the process is not the same. First, the femtosecond laser creates a lid (corneal flap) on the cornea, and then the doctor manually lifts the lid.
Image credit: Permissioned shooting
You will then be moved to another instrument, where the corresponding degree of corneal tissue will be cut off with an excimer laser. Sometimes you will smell a burnt-like smell during the process, which is due to the cornea being vaporized by the laser.
Image credit: Permissioned shooting
Finally, the doctor will put back the corneal flap that was previously lifted and let it heal on its own.
The advantage of half-femtoseconds over full femtoseconds is that it cuts corneal tissue thinner, but because its incision is larger than full femtoseconds, it damages more epithelial nerves, so it is more likely to occur dry eyes than after full femtosecond surgery.
At present, the diopter that can be corrected by laser corneal refractive surgery ranges within 1200 degrees of myopia, 600 degrees of farsightedness, and 600 degrees of astigmatism.
But because you have to cut the cornea, so full femtoseconds and half femtoseconds have requirements for corneal thickness, if your cornea is not thick enough, or the degree of myopia is too deep, more than 1000 degrees, the doctor will recommend you to do another surgery -
ICL lens implantation
An ICL is when a doctor puts a special "contact lens" into your eye. If laser surgery is to subtract the cornea, then the ICL is equivalent to "addition" in the eye.
Image source: from the internet
Surgery requires only a small incision at the edge of the cornea, so the damage to the cornea is minimal, and if there is a problem after the operation, the lens can be removed.
According to students who have done ICL, the moment the crystal is implanted in the eyeball, you will feel that the whole world is open. However, it should be noted that ICLs are more expensive and not completely reversible as some ads claim.
Every implant and removal is accompanied by the risk of surgical complications, and there is also a certain degree of loss of corneal endothelial cells. In addition, it belongs to the inner eye surgery, which means that once complications occur, they are often more serious.
Image source: from the internet
In general, if the eye conditions are sufficient for laser surgery, especially the low and medium degrees, there is no need to choose ICL for the so-called "reversible" at this stage; if the eye conditions are more suitable for ICL, there is no need to worry, and the safety of this surgery has been fully verified.
No matter what kind of surgery, you must choose a reliable medical institution, you can consult with multiple parties when you are not sure, and do not rush to make a decision.
Postoperative recovery will also affect the effectiveness of surgery
After the operation, the anesthesia will persist for a period of time, but after the anesthesia has passed, you will obviously feel uncomfortable, similar to the feeling of a foreign body in the eye. But don't worry, this situation usually lasts for 2 to 3 hours, and it will be more comfortable to close your eyes and rest.
Usually when they wake up the next day, most people will feel a new look in front of them, opening up a clear new world.
But don't rush to have fun! If the postoperative care is not in place, and some bad eye habits are not changed, it will affect the effect of the operation. For example, some people catch the eye after surgery, and then the degree rises again, thinking that the operation did not completely cure myopia and will rebound.
In fact, it is not accurate to say so, myopia surgery can not "cure" myopia, can only correct the symptoms of myopia. For example, if myopia is 500 degrees, then cut 500 degrees for you. If you go up 100 degrees later, the past surgery won't work.
Therefore, after surgery, we should cherish the clear vision, listen to the doctor's words, and do not do it. In addition, in order to reduce the symptoms of dry eyes after surgery, it is also necessary to control the time to see electronic products in the short term, pay attention to eye hygiene on weekdays, blink more to avoid excessive evaporation of tear fluid, and maintain suitable temperature and humidity in the daily environment.
Finally, we help you summarize the advantages and disadvantages of several common myopia surgeries and price comparisons:
Image source: Dr. Lilac
Still stunned, hurry up and collect it! And don't forget to share it with your near-sighted friends.
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