Generally speaking, young people and those with low myopia before operation recover quickly; In addition, vision (such as reading, watching fine objects, etc. ) recover earlier than the recent one. Generally, you can live and work normally after a day or two of rest. But in the process of postoperative vision recovery, attention should be paid to eye hygiene to avoid eye fatigue and discomfort.

2. Optical transmission principle of laser surgery.

Before the operation, the doctor inputs the patient's basic information and operation data into the computer (including the depth of laser focusing, that is, the distance from the bottom of the cone lens to the laser focusing point; The diameter of corneal flap, the size and width of pedicle; Energy of laser cutting, etc. During the operation, the doctor operates the femtosecond laser and fixes the cornea with a cone lens, so as to keep the precise distance between the laser head and the laser focusing point in the corneal tissue.

Laser focus depth, that is, the distance from the bottom of the cone lens to the laser focus, the femtosecond laser emits laser pulses according to the mode set by the doctor, and makes various targeted cuts on the cornea. In a word, what impressed us most about the optical transmission principle of femtosecond laser is the precise orientation and precise positioning of optical transmission.

3. The risk of laser treatment of myopia

Myopia treatment surgery is to remove the cornea of eyeball, change the refractive index and thickness of cornea, and make the focus of light fall on retina accurately. However, the regeneration effect of the organism itself is irresistible. Although the process of corneal regeneration is relatively slow, generally 2-3 years, at that time, it was like a person's epidermis was cut off and grew up slowly, and the cornea was no longer smooth and shiny and became a mirror. What you see at this time is also deformed, leading to eye edema, fatigue, headache and other uncomfortable symptoms.

What does laser surgery need to pay attention to in treating myopia?

Infection. Any corneal surgery with a wound will have a chance of infection. After the cornea is restored, the wound is exposed to the air, and careless hygiene will cause inflammation and infection.

Too thin cornea causes corneal dilatation. Treating myopia is to flatten the cornea, but the peaceful cornea will be squeezed by intraocular pressure, which will make the cornea protrude forward. This kind of pressure is not felt by people, but the consequence will aggravate myopia and even produce irreversible astigmatism, instead of treating myopia.

Precautions after laser myopia correction surgery: On the day after myopia surgery, there will be symptoms such as tears, photophobia and foreign body sensation in the eyes. A few people will feel slight eye pain or subconjunctival bleeding after surgery, which is also a normal phenomenon after surgery. The severity and duration vary from person to person, and subconjunctival hemorrhage usually disappears in about 2 weeks. The following are some nursing measures after laser myopia correction surgery:

Please wear goggles or sunglasses and an eye mask within 2 days after operation to protect your eyes from the displacement of corneal flap caused by external force.

Don't go into nightclubs and dance halls within 1 week after operation, and don't eat irritating food (so as not to aggravate eye discomfort). There is no special requirement for diet after 1 week.

Who is not suitable for laser surgery?

/kloc-people under 0/8 years old: As a part of the body, eyes are constantly developing./kloc-people over 0/8 years old are usually considered mature, including eyes. Although laser treatment of myopia is minimally invasive, it is a traumatic operation after all. If the operation is performed before the eyes are mature, it may have unpredictable consequences.

Unstable vision: Those who undergo laser myopia surgery must have stable vision for at least one year. This is because, in the case of unstable vision, the effect after the operation at that time was no problem. However, due to the deepening of the patient's myopia, the cornea of the patient's eye has become thinner and it is impossible to perform laser surgery again. Therefore, patients have to wear glasses again, or even wear myopia glasses for life. Vision stability refers to myopia patients whose degree increases by no more than 50 degrees every year.

Eye disease: Suffering from acute active inflammation, dry eye, eyelid insufficiency, glaucoma, cataract, uveitis, retinal detachment, ischemic eye disease, herpes simplex and other viral eye diseases.

Systemic diseases: such as KF3, collagen diseases, people with scar constitution (some hospitals may not pay attention to this, but it is very important, so be sure to tell the doctor in detail.