1983 invented the excimer laser therapeutic instrument, and 1985 applied it to the clinical treatment of myopia, which greatly improved the safety and accuracy of myopia treatment. PRK is mainly used to treat patients with moderate and low myopia below 700 degrees, but the disadvantage is that they will feel pain within a few days after operation. However, due to the destruction of normal corneal anatomical structure, complications such as corneal opacity, glare and refractive regression may occur after operation.
Extended data:
Unsuitable crowd
1, under 18 years old
The operation is not suitable for people under 18 years old, and the operation requires the patient's refractive state to be stable. Refractive states include myopia, hyperopia, astigmatism and other ametropia. Because/kloc-young people under the age of 0/8 are in the physical growth period and the diopter of their eyes is unstable, if they are operated blindly, their eyesight is likely to deteriorate after one or two years. The best age for surgery is 25 to 30 years old.
2. Congenital eye disease
Laser myopia surgery requires a certain corneal thickness, which varies from person to person. Some people cannot do laser surgery because of congenital deficiency.
3, presbyopia is not suitable for surgery.
Presbyopia is caused by the attenuation of accommodation with age. Even if it is cured temporarily, it will recur with age.
4. People engaged in water sports should not have surgery.
Therefore, excimer laser surgery for myopia must meet the following conditions: first, the age is between 18-50 years old; Second, the myopia degree should be stable for more than two years; Third, there is no history of other serious eye diseases and ophthalmic surgery; Fourth, there is no diabetes, collagen disease and scar constitution.
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