What are the main types of myopia laser surgery and which method is the safest?

Laser surgery for myopia mainly includes: ICL lens implantation, minimally invasive full femtosecond surgery and semi-femtosecond surgery. The safety factors are all high, and they are all safe and reliable.

1, minimally invasive full femtosecond surgery. This is a minimally invasive and safe laser surgery, which is valveless, silent, tasteless and painless. The operation process is short, the eyes only need 5 minutes, and there is no noise of laser grinding and burning smell. Because there is no need to open the cornea, there is no need to worry about the risk of corneal flap displacement or shedding caused by eye trauma; The cornea is more stable, and the corneal nerve is preserved to the greatest extent; Dry eye reaction is mild, and postoperative vision is predictable.

Within the range of good corneal morphology and allowable thickness, myopia can be corrected by 50~ 1000 degrees, and astigmatism can be corrected by 50~500 degrees. Full femtosecond requires doctors' skills, which is strict with the preoperative degree and corneal condition of patients. Patients must actively cooperate with gaze for 40 seconds during operation, so some gaze training is needed before operation.

2. Semi-femtosecond surgery. Also known as femtosecond full laser surgery, it is safe and painless. During the operation, the corneal flap was made by femtosecond laser, then the corneal stroma layer was polished by excimer laser, and then the corneal flap was reset. There will be a burning smell during operation, and the corneal flap will heal automatically after operation.

Semi-femtosecond correction has a wider range and is an important supplement to full femtosecond laser. Some patients are not suitable for full femtosecond surgery, but semi-femtosecond surgery can be performed through personalized settings, such as hyperopia, presbyopia, corneal thinning in a certain range, height and high astigmatism. Semi-femtosecond requires corneal flap, so there is a risk of corneal flap displacement, and once it happens, it needs a second operation. In addition, the incidence of dry eye after semi-femtosecond surgery is higher than that after full femtosecond surgery. ?

3.ICL lens implantation. The operation is to implant a fine and ultra-thin lens in the eye. The material has good biocompatibility and no adverse reaction to eyes. It is suitable for ultra-high myopia above 1000 degrees or moderate and low myopia with too thin cornea which is not suitable for laser surgery. As long as there is no limitation of the depth of anterior chamber and abnormality of corneal endothelium, it is suitable for ICL lens implantation in principle. The whole operation takes only 5~ 10 minutes without hospitalization.

The surgical incision is small, only 2~3 mm, and the crystal is soft and foldable, which does not change the structure and shape of eye tissue. He recovered quickly after operation and could work normally the next day. Because it is "addition", once there is a problem, the lens can be taken out at any time, which means that this operation has strong reversibility. But after all, it is intraocular surgery, and the risk of surgery is higher than that of myopia laser surgery, which requires a series of preoperative examinations to determine whether it is suitable. ?

Extended data:

In addition, other myopia operations, as well as some other types of operations, such as traditional LASIK surgery, can also obtain clear vision after surgery. However, due to the need to use lamellar knife to make corneal flap during operation, there may be pain and temporary blindness, and the risk of easy displacement of free flap and corneal flap after operation cannot be completely avoided, so fewer and fewer patients gradually choose this method.

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