What is the difference between half flying and full flying myopia eye surgery?

Both femtosecond laser surgery and femtosecond laser surgery are surgical procedures called lamellar corneal laser surgery, which, as the name suggests, involves hitting a laser into one of the lamellar layers of the cornea. Full femtosecond laser surgery, in which femtosecond laser is used throughout the laser process. The femtosecond laser uses femtosecond laser in one part of the first method, and the other part uses excimer laser, so it is called semi-femtosecond.

There is no exact standard for which of these two surgical methods is superior or inferior, as they are different surgical methods and are suitable for different groups of people. Therefore, it is recommended that patients go to the hospital for a formal examination to determine which surgical method is more suitable.

Do full femtosecond and half femtosecond. This surgery depends on the power of your own eyes and the condition of the cornea, generally speaking, the power of full femtosecond is relatively low, and the power of half femtosecond can be slightly higher. When you choose this laser surgery, you must remember that it is not a surgery, the more expensive this surgery is, the better, it is just a matter of cost.

Some patients also have very good results from excimer lasers, which should be chosen according to your prescription.

Full femtosecond laser and half femtosecond laser are different surgical methods for corneal laser surgery. The femtosecond laser is used to complete the whole operation, and 2 femtosecond laser cuts are done at different depths of the cornea to make a transparent cornea, and a small arc-shaped incision is made at the limbus of the cornea, and the transparent cornea is removed from the cornea, so as to change the refractive state of the cornea and achieve the effect of correcting refractive error. The femtosecond laser is completed by using the technology of excimer laser and femtosecond laser, first using femtosecond laser to make corneal flap, and then using excimer laser to cut the cornea under the corneal flap to remove a certain angle thickness to achieve the effect of correcting refractive error.

One of the biggest features of the ReLEx laser is that there is no need to make a corneal flap, and there is no risk of corneal flap displacement. ReLEx and femtosecond surgery have their own advantages and disadvantages, and different surgical methods can be selected for different corneal and power conditions.

Half femtosecond:The first step is to make a corneal flap with a femtosecond laser, usually 110 microns thick. The flap is then lifted, laser cutting, and the debris is rinsed at the end of the cutting, and the corneal flap is repositioned, and the operation is over.

The indications for half femtosecond are wider, and there are different surgical methods according to the patient's conditions, such as Zeiss thin flap half-flight, wavefront aberration-guided half-flight, topographic map-guided half-flight, etc.

ReLEx:Instead of making a corneal flap first, the machine performs two laser scans of different depths directly on the corneal stromal layer to form a complete lens-shaped corneal tissue. The surgeon then uses instruments to separate the lens in the corneal stromal layer, and then removes the corneal tissue of the lens, and the operation is complete.

ReLEx surgery requires myopia and astigmatism, which not everyone can do. Compared with half femtosecond, with the same power, in different ways, full femtosecond requires more corneal tissue. At present, ReLEx does not allow for personalized surgery.

Because there is no corneal flap, the incision is only 2 mm, which is higher in terms of safety.

The main difference between the two surgical methods is the size of the incision, because ReLEx does not have a corneal flap, and the postoperative recovery is faster.

Advantages of Half Femtosecond:

1.Personalized surgical methods can be formulated under topographic map guidance and Q value design, and the postoperative visual quality is high;

2.Femtosecond laser makes a corneal flap, and the corneal flap is made evenly and is embedded in the occlusion;

3.Intraoperative negative pressure is low, comfort is high, and recovery is fast;

4.Mild postoperative discomfort;

5.Knifeless surgery reduces the number of infections.

Half-femtosecond disadvantages:

1.The corneal incision is large and there is a flap, and there is a risk of subvalvular foreign body, flap displacement, and flap elevation after surgery;

2.The biomechanical changes of the cornea are greater than those of the full femtosecond.

Advantages of full femtosecond:

1.Small incision, no corneal flap, avoid corneal flap-related complications, and fast postoperative recovery;

2.Maximizes corneal integrity, tolerates antagonistic movements, and has stable long-term vision;

3.Low intraoperative negative pressure, high comfort, and safe operation;

4.Postoperative corneal dryness and other uncomfortable symptoms are mild;

5.It is suitable for patients with small eyelids and has a wider range of indications.

ReLEx Cons:

1.The cost is higher;

2.Ultra-high myopia and astigmatism are not suitable for this surgical method;

I was going to do it before, so I did some homework.

Generally, the doctor will leave our cornea thickness at least 400, if the corneal thickness is less than 400, it is very dangerous, either accidentally blind, or vision loss, and myopia, so the doctor will judge what you are suitable for according to the condition of your own eyes.

The trauma of the full femtosecond is only 2-4mm, cut the cornea, make corneal lenticules in the corneal stroma, the surgeon only needs to take out the lens, the corneal base layer is relatively cut, so the state of the eye is more demanding, not everyone can do it, the requirements for the doctor's surgery are also high, the probability of complications I feel will be smaller, half femtosecond to open the corneal flap, the wound is 20mm, and then make a corneal flap, the excess corneal stromal layer is cleaned out, the relative cut is a little less, but the wound is larger, And there is a risk of corneal flap displacement and folding, but there is no such risk as Quanfei. After the procedure, it will be fitted, but the wound will not heal because the stromal layer will not regenerate, so the surgery is irreversible.

Complications include: 1. The corneal flap is off-center, folded, and will be ghosted when looking at things, which is basically a waste of the eye.

2. The laser cuts through the cornea, or the effect is not achieved, which is overcorrection or undercorrection, and there is no way.

3. Glare, generally high myopia will appear, that is, there is a halo when looking at things.

4. After surgery, the vision decreases, but generally unless it is low-grade myopia, it is 0-300 degrees, otherwise the vision will decrease after doing it.

5. Dry eye syndrome, floaters, this is a common problem, some people disappear, some people are still there for a few years, and it is serious, but I think normal people have a little floaters in their eyes, but it is not serious, everyone has not found it, but some people will be serious after doing it, and it will be induced.

And so on small problems, there are more types, I will not list, pure hand, I hope to help you, I personally think don't worry about which way, if the eye is suitable, I think the doctor can do the full flight if the skill is good, but the doctor can't do it, just do the half fly, after all, the eye is too precise, can not have too much error, otherwise it is very troublesome, but now the machine is very good, but also in the safety range class, you know the consequences and then do it, otherwise there is a problem afterwards will regret it, and it is not good for life, consider it well.

In myopia surgery, "full femtosecond" and "half femtosecond" are often mentioned, but in fact, there are two different myopia surgery methods, what are the differences between the two, and which one is better? How do you choose?

ReLEx laser correction surgery and femtosecond laser correction surgery are now widely used in medical treatment of myopia surgery, the effect of femtosecond surgery is better, and the accuracy is higher, the safety is high, in addition to the operation time is very short, the possibility of sequelae is also the smallest among many surgeries, but it is more expensive, and the femtosecond is slightly worse than femtosecond in terms of effect and more, but it is cheaper and easy for patients to accept.

ReLEx has the characteristics of no flap, which is more suitable for people who like confrontational sports, but it has higher requirements for corneal thickness, while femtosecond laser LASIK surgery has a corneal flap, but it can retain more corneal tissue, and superficial surgery has more advantages in patients with moderate and low myopia, especially thin cornea.

Therefore, different surgical methods have their advantages and disadvantages. Choosing the right surgical plan for you is a powerful guarantee for surgical safety and postoperative visual results.

At present, there are more and more patients with myopia, and myopia mainly includes wearing glasses, surgery, etc. There are pros and cons to each way, so be cautious.

Many patients with myopia feel that wearing concave lenses affects their daily life and work, so they want to do laser surgery to help the symptoms of myopia.

With laser surgery, the patient is able to return to normal vision after **myopia, which is no different from a normal person. However, laser surgery can also come with a range of after-effects. As patients age, the cornea ages, which may induce blindness.

The main differences between full femtosecond and half femtosecond are as follows:

Corneal wounds: Femtosecond wounds are smaller

The operation time of full femtosecond and half femtosecond is very short, the whole operation is less than 10 minutes, and the time required for the patient's cooperation is almost half a minute. If performed by the same skilled doctor, the operation time of full femtosecond will be slightly shorter than that of half femtosecond.

Surgical results: basically the same

Because the cornea has no blood vessels, the recovery after incision will be slower and the growth will not be as strong as the original, so half femtosecond does not recover as fast as full femtosecond.

Daily care: Half femtosecond should pay more attention to eye protection.

Due to the large incision of the femtosecond grade, an eye patch should be worn on the first day after surgery to prevent the cornea from being inadvertently touched and lifted. There is no need to wear an eye patch after ReLEx surgery.

In addition, the safety and stability of the cornea after half-femtosecond healing are not as good as those of full femtosecond, such as inadvertently scratching the cornea with a fingernail while playing basketball or in life, there is no problem with full femtosecond, but half femtosecond may pry the wound open. During some sports, such as bungee jumping, diving, and swimming, there is no problem after the recovery of the full femtosecond, but the half femtosecond may require more attention to protect the eyes.

The difference between half femtosecond and full femtosecond for myopia surgery:Postoperative reliability and stability, trauma and recovery time, scope of application.

1. Postoperative reliability is different from postoperative stability

Femtosecond laser surgery mainly uses femtosecond laser to make a corneal flap, and the excimer laser ablates the corneal stromal layer to change the corneal reflexion rate, thereby correcting refractive myopia.

ReLEx laser surgery is mainly used to make corneal lenticules on the corneal stromal layer through femtosecond lasers, and the surgeon only needs to remove the lens, and the operation is completed.

2. The recovery time is different for different traumas

Femtosecond laser surgery involves creating a corneal flap and opening the flap to ablate the corneal stromal layer. Therefore, the corneal edge incision made by femtosecond laser has an incision of about 20 mm.

The operation of Quanfei Laser only requires a 2-4mm incision, which ensures that the doctor can remove the lens.

3. The scope of application of full femtosecond and half femtosecond is different

The applicable range of ReLEx is myopia from 200 degrees to -1000 degrees. The range of application for half femtosecond is 600 degrees of hyperopia to 1200 degrees of myopia.

In terms of the scope of application, the range of half femtosecond is larger than that of full femtosecond, which also reflects that half femtosecond has lower requirements for patients' own conditions than full femtosecond.

The difference between femtosecond and femtosecond: 1. The main difference is that the whole process of femtosecond laser surgery is completed by femtosecond laser, and half-minute second laser surgery is completed by femtosecond laser and excimer laser; 2. The femtosecond laser surgery is less invasive, that is, minimally invasive surgery, after the completion of the femtosecond laser, the femtosecond laser is first used to make a small corneal incision, the incision is usually about 2mm, and then the previously made intracorneal lens is removed to complete the operation. The half-minute laser uses a femtosecond laser to create a corneal flap, and the corneal flap is lifted and the excimer laser corneal ablation is performed below.

After the operation is completed, the corneal flap is restored, so the wound and trauma of the corneal flap are relatively large. It is recommended to consult Guangzhou Aier Ophthalmology, which has not only won the reputation recognition of patients "seeing eye diseases, going to Aier", but also won the recognition of all walks of life. The click test is not suitable for myopia correction.

Femtosecond is a special type of laser, which uses a laser to vaporize tissues between the layers of the cornea, producing carbon dioxide and water to form bubbles, which can cause separation between the two tissues. Femtosecond lasers are mainly used in refractive surgery, corneal transplantation, cataract surgery, etc. Its main use is myopia, using femtosecond laser on the cornea to separate the interlaminar tissues of the cornea, changing the refractive power of the cornea, and myopia.

If you want to know more about the full femtosecond and half femtosecond, it is recommended to consult Guangzhou Aier Ophthalmology. In the implementation of the quality management of the hospital, the hospital formulates the quality control assessment standards of the hospital based on the rules and regulations, staff codes, routines and indicators formulated by the Ministry of Health and the relevant departments at higher levels, and combines the actual situation of the hospital, including medical quality standards, teaching and scientific research quality standards, medical ethics and spiritual civilization construction, conduct assessment standards, logistics work quality assessment standards, financial work assessment standards, quality and efficiency annual activity assessment standards, and professionalism is trustworthy.