In addition, I would like to ask what is the difference between excimer therapy and femtosecond lase

Excimer laser and femtosecond laser are two different types of lasers. Excimer laser is a kind of ultraviolet light, its wavelength is 193nm, the main principle is to break the molecular bonds between cells, directly vaporize tissues, in myopic eyes, mainly by changing the corneal morphology to complete the correction of refractive error. Femtosecond laser is a far-infrared pulse, about 1053nm, the main function is to produce small bubbles between tissues, bubbles through the principle of blasting to achieve separation, in myopia eye surgery, mainly through the blasting of the upper and lower layers, take out the lens, to achieve the effect of correcting myopia, so the principle and mechanism of the two are different.

Nowadays, more and more people are doing femtosecond lasers, because they have advantages compared with excimers, such as their safety. The thickness of the valve, the position of the valve and pedicle can be adjusted according to the individualized differences of the population, and each person is treated with a sterile ** package, and the risk of infection is smaller.

In general, myopia surgery is divided into 2 steps:

1.Make a corneal flap.

Laser**. The difference between ordinary lasik and excimer is the first step, to put it simply.

The common excimer is: lamellar knife cut corneal flap + lasik

Femtosecond laser is: femtosecond laser incision corneal flap + LASIK

To add, in January 2010, there was a preferential activity for "good ophthalmology", and the femtosecond laser was only 6999 yuan, which was claimed to be the lowest in the country.

The femtosecond laser is a true all-laser operation, and the excimer ** also uses a knife to make a flap.

The difference in the effect is that femtosecond laser is myopia, more original, better visual quality, and better safety. This is a major technological breakthrough in myopia surgery.

You can call ** to consult the optometry clinic of the Fourth Hospital of Harbin Medical University, ** is 0451-82576588

The excimer is made with a blade, which is not very precise, and the femtosecond is made with a laser, which is very precise. In our Sichuan region, it seems that only Chengdu Preh Ophthalmology has femtosecond laser.

It's an old question. In the traditional LASIK surgery, a flap is made on the cornea with a lamella, and after the flap is lifted, the excimer laser is used to cut to treat myopia;

Femtosecond laser is to use femtosecond laser instead of lamellar knife to make flaps, and to use excimers to treat myopia. At this stage, the technology is mature, safe, and the postoperative vision is good. The da Vinci femtosecond laser has been operated on 80,000 cases in China, which is safe and has good postoperative vision.

The excimer is to use a scalpel to cut a layer of "flap" on the cornea, and then apply it after the laser cuts the cornea, femtosecond does not need a scalpel, and the femtosecond laser is used as a "flap", which is safer than the excimer, there will be no deviation, and the postoperative recovery effect will be better.

There is still a big difference between the femtosecond laser and excimer laser surgery process. Generally, excimer laser surgery requires a corneal flap to be done first, and then a laser is used to scan the corneal flap after the flap is lifted. ReLEx laser surgery generally does not require a corneal flap.

The differences between femtosecond laser and excimer laser are:

1. Different uses: femtosecond lasers have been widely used in physics, biology, chemical control reactions, optical communication and other fields. Excimer lasers are widely used in clinical medicine as well as in scientific research and industrial applications.

2. Different characteristics: femtosecond laser is the shortest pulse that we humans can obtain under experimental conditions, and its accuracy is 5 microns. It has a very high instantaneous power, and its instantaneous power can reach 100 trillion watts, which is hundreds of times more than the total power generated in the world.

Excimer laser is a mixture of fluorine and hydrogen gas that is excited to produce a kind of ultraviolet light that is invisible to the human eye, which is a cold laser, which can accurately ablate the cornea of the human eye and is expected to remove part of it, without damaging the surrounding tissues and other tissues and organs, and its effect is permanent.

3. Time is different: the femtosecond laser (the first ruby laser) came out in 1960. The excimer laser was invented in 1970 at the Moscow Institute of Physics.

If you want to do femtosecond laser and excimer laser, it is recommended to choose Guangzhou C-MER Ophthalmology.

The differences between femtosecond laser and excimer laser are as follows:

Excimer laser and femtosecond laser mainly refer to the different types of lasers, the penetration of excimer laser is relatively poor, but the ablation ability is relatively strong. Generally, the correction surgery of excimer laser usually requires making a corneal flap and opening the corneal flap to perform stromal ablation of the cornea, or using alcohol to remove the corneal epithelium, and then performing corneal ablation with excimer laser, because it has poor penetration, and there is no way to pass through the corneal epithelium for direct ablation. Femtosecond laser has strong penetration, but the ablation ability is relatively poor, usually to make a corneal flap, or full femtosecond surgery can make a corneal lens, but you need to make an incision in the limbus and take out the lens.

Therefore, it is generally necessary to choose the corresponding surgical method according to your own needs and the specific situation of the cornea.

Guangzhou C-MER Ophthalmology.

Based on providing high-end lean medical services for refractive correction and diversified diagnosis and treatment of eye health for children and adolescents, it has international equipment such as comprehensive refractor and imported femtosecond equipment, and has set up a special eye health science education base, and has also introduced a professional ophthalmology digital diagnosis and treatment system to build an ophthalmic transparent operating room and provide personalized visual diagnosis and treatment programs.