How much harm does laser treat myopia? Try to talk about what you have done.

The biggest difference between femtosecond laser therapy and ordinary excimer laser therapy is that the corneal flap is made by laser instead of lamellar keratome, so the corneal flap made by lamellar keratome has unique problems, such as knife sticking, corneal flap falling off, corneal flap incompleteness, flap fracture, corneal flap being too small or too large, etc. It will not happen again during femtosecond laser treatment, so the safety is greatly improved compared with ordinary LASIK, but the following situations may still exist.

1. During femtosecond laser treatment, eyes should not be squeezed or rolled, otherwise there may be negative pressure. If it happens, it is necessary to redo the corneal flap or postpone the operation.

2. If there is oozing blood, secretions, fibers, etc. Under the corneal flap, it needs to be rinsed again. Frequent blinking and eye turning after operation will increase this possibility. In severe cases, the corneal flap will be displaced and need to be re-flushed and reset, which generally will not affect the surgical effect.

3. Inflammation between corneal flaps, epithelial implantation and corneal flap melting after operation. Need medication or surgery.

4. Due to the sensitivity of the individual to laser and the degree of corneal biomechanical changes after surgery, there may be overcorrection, undercorrection and refractive regression after surgery. Generally speaking, refractive regression is related to the refractive state of patients before operation. The higher the degree, the greater the possibility of postoperative regression.

5, high myopia, astigmatism is a pathological state, myopia is a stage or continuous progressive development, medically known as progressive or pathological myopia. The condition can not be completely diagnosed before operation, but it may continue to develop after operation, and glasses are still needed if necessary.

6. Surgery does not improve or aggravate complications (such as fundus hemorrhage, retinal detachment, degeneration, hole, complicated cataract, etc.). ) caused by myopia (especially high myopia). Therefore, it is still necessary to check the fundus regularly after operation in order to find the fundus lesions complicated by high myopia at an early stage.

7. During the postoperative recovery period, dry eyes, reading difficulties, glare, decreased night vision ability, and difficulty in driving at night may occur. And the above symptoms may persist in some patients.

8. Avoid sewage and foreign bodies from entering the eyes after operation, do not go to the environment with dust and unclean floating objects in the air, and apply anti-inflammatory eye water in time and correctly, otherwise the cornea may be infected, which will seriously affect vision.

9. After the operation, some people will have redness of the eyes (subconjunctival hemorrhage), which is caused by the patient squeezing his eyes hard during the operation, and the absorption is slow, which will not affect his vision.