The difference between half femtosecond and full femtosecond is also the price of 20

Femtosecond lasers can be used not only to make corneal flaps for excimer laser lamellar surgery, but also to perform refractive correction, combining flap making and laser cutting into one. The function of the excimer laser is generally only to correct the diopter, and there is no valve-making effect. If a flap is needed, a micro-keratome or femtosecond laser is required.

Full femtosecond, half femtosecond, and excimer laser, this is a folk saying, in fact, the surgical classification is not exactly so divided, full femtosecond and excimer are actually two sets of content, full femtosecond, it is a surgery done with femtosecond laser, the principle of surgery, surgical method and excimer laser surgery, there is a fundamental difference, often said that this femtosecond laser, and excimer laser, it is actually two kinds, different types of lasers, they do myopia principle, but also completely different, full femtosecond laser, It is to take out a lens, it is also called lens extraction, that is, to use a laser knife, to make a mirror in our eyes, and then through a small incision, the mirror is taken out, this is a full femtosecond surgery, our excimer laser, it is an ablative surgery, that is, acting on the surface of the cornea, shaping the corneal surface into a shape, is a kind of surgery, it carries many surgeries, like LASIK or half femtosecond laser, or some puncture PRK, all of which belong to the excimer type, This kind of surgery is in the femtosecond process, which is to use femtosecond laser to make a corneal flap, after the corneal flap is opened, the excimer laser is used to cut a myopia, so as to achieve the purpose of the whole process, so that the LASIK surgery is completed.

ReLEx laser surgery, femtosecond laser surgery and excimer laser surgery are all commonly used surgical methods to correct myopia, but there is a big difference between the three.

Excimer laser surgery is currently the most widely carried out method of hand disturbance search, through the mechanical corneal lamellar knife to make the corneal flap, and then use the laser in the corneal membrane matrix to carve out the myopia degree that the patient needs to correct, which has the advantage of being cheaper, but the postoperative recovery is relatively slow and the accuracy is relatively poor.

Femtosecond laser surgery uses a laser to create a corneal flap, which has the advantages of high precision and fast recovery.

However, ReLEx laser surgery does not require the production of corneal flaps, but by making a tiny incision of no more than 4mm on the cornea, the corneal lens cut out by the laser in the corneal stroma is removed, thereby changing the refractive power of the cornea, which is currently the least invasive and fastest recovery surgical method.

Half femtosecond, full femtosecond and excimer laser have their own advantages, patients must choose the surgical method according to their occupation, age, eye needs, and then according to the actual value of their eyes, so that the doctor can analyze the most suitable surgical method. [Click to test whether I am suitable for myopia surgery].

Excimer laser, femtosecond, and femtosecond are generally the best excimer laser and femtosecond laser surgery, but both surgical methods also have their own advantages and disadvantages.

The advantage of ReLEx laser surgery is that the latest laser magnification technology can be used to make a very precise lens in the cornea, and then this lens can be taken out to effectively correct myopia. In addition, there is only a small incision of 2 mm on the surface of the eye during surgery, so it is an ophthalmic surgery with relatively high surgical safety. The advantage of excimer laser surgery is that it is the most accurate surgery.

If you want to know more about myopia hand-style surgery, it is recommended to consult Guangzhou Yinghua Ye Teasing Ophthalmology. As a chain brand ophthalmology, Yinghua Ophthalmology strictly implements the diagnosis and treatment standards and charging standards led by the first department, and ensures that each patient does not spend a penny of unjust money, sees a doctor clearly, and clearly eliminates the envy of the sales fee through the charging form of surgery, customized plan, and clear price.

Femtosecond and femtosecond are also referred to as femtosecond laser surgery and femtosecond laser surgery, and the difference between the two is that the operating principles are different, the characteristics are different, and the suitable people are different.

1.The principle of surgery is different:

The femtosecond laser is a femtosecond laser that makes an 18mm corneal flap, and then the corneal tissue is cut by an excimer laser to change the curvature of the cornea, thereby correcting myopia.

The whole process of femtosecond laser is operated by femtosecond laser, which uses femtosecond laser to scan the corneal J stromal layer to form a lens, and then takes out the lens through a 2-3mm micro-incision in the cornea to achieve the effect of correcting myopia.

2.The characteristics of the surgery are different:

The femtosecond laser can be accurately corrected according to the patient's myopia degree and astigmatism axis, but the trauma will be larger, and the chance of infection and dry eye will be greater.

ReLEx laser does not need to make corneal flaps, which can avoid postoperative corneal flap dislocation, and the damage to the corneal nerve is relatively small, and dry eye is not easy to occur after surgery, with high safety and accuracy, low probability and fast recovery. However, due to the operation in the stromal layer, it is difficult to deal with if infection occurs, and the probability of infection in actual clinical practice is extremely low.

3.Suitable for different groups of people:

Half femtosecond laser correction has a wide range and is suitable for people with myopia below 1200 degrees, and the price is relatively cheap.

The ReLEx laser is suitable for people with eyes below 1000 degrees, and it cannot correct high-order aberrations that affect night vision.

Half femtosecond and full femtosecond have their own advantages and disadvantages, and you need to go to the relevant departments of regular hospitals for treatment, and choose a suitable correction plan according to your own situation under the guidance of a doctor.

ReLEx surgery is an effective solution to myopia, and the main technique is to use a laser to locate the cornea, and then use the laser to change the refraction of the cornea. This type of surgery has its own advantages and disadvantages, including the advantages of less risk, the correction of the problem is more extensive, and the disadvantage is that it may cause sequelae. Next, the three sequelae of ReLEx surgery are analyzed in detail.

1. Dry eye syndrome.

Dry eyes are one of the common sequelae of ReLEx surgery, mainly caused by conjunctival tissue lesions, due to the lack of tear gland secretion, so the eyes are sour and dry, especially after using electronic products and staying up late. During this period, the patient's eyes have a foreign body sensation, and there are adverse eye reactions such as photophobia and wind intolerance, so they need to wear goggles when traveling outdoors.

2. Vision problems.

The doctor's operation level is an important factor affecting the success rate of surgery, and surgery cannot guarantee that the patient's vision will return to the best state after surgery, and some patients still need to wear glasses for correction although their vision has improved after surgery. If the cornea or nerves are damaged by improper operation by medical staff, the patient may develop night blindness after surgery, which may affect night walking.

3. Inflammation. People laugh at the fact that before doing the ReLEx surgery, they must find a regular hospital. If the patient does not do a good job of disinfection during the operation, the postoperative patient does not protect the wound, and the germs can easily enter the eyes, so it causes keratitis and other diseases, which are manifested as local pain, increased discharge and eye redness.

Patients in the early stages of the disease usually need to be treated with medication to control the disease.

All in all, myopia surgery has certain risks, and in order to reduce the occurrence of sequelae, people need to undergo a comprehensive physical examination before surgery, and surgery should not be done in case of eye trauma or inflammation. If the patient unfortunately has sequelae after surgery, it must be done as soon as possible to facilitate the recovery of the eyes, such as using drugs to relieve dry eyes, and supplementing the nutrition of the ocular nerves.