Only after the age of 40, people will be presbyopia. The principle of presbyopia is that the elasticity of the lens becomes worse, and then the strength of the ciliary muscle becomes weaker, so it is difficult to see near. Because normal people will have presbyopia when they are over 40 years old, they can solve it with presbyopic glasses at this time. There is also that after people are over 40 years old, some people will gradually develop cataracts. Cataract is serious in the future, and another cataract operation is needed. After cataract surgery, vision can return to normal, so don't worry too much. Myopia surgery is generally safe and effective at present. Although there are complications and contraindications, it will not happen basically if it is well controlled, so myopia surgery is safe and effective.
After 18 years old, if the myopia degree of patients has not changed in the past two years, corneal refractive surgery can be considered to correct myopia. Because the patient's myopia has been corrected, with the growth of age, especially after 40 years old, there will be symptoms of blurred vision and fatigue, which is called presbyopia, which is also referred to as presbyopia in clinic. Presbyopia is an age-related disease, and myopia can be corrected by wearing reading glasses. So it is an obvious mistake to be blind at the age of 40 after laser surgery. Wearing reading glasses requires optometry. The degree of reading glasses is not constant for life. With the growth of age, optometry correction degree is needed every two years. With the increase of age, the degree of the eyes will gradually deepen. Generally, when the patient is around 70 years old, the degree of reading glasses will tend to be stable.