Parents are always worried about the increasing myopia of their children, and middle-aged and elderly people are often troubled by blurred vision Can these people have myopia surgery?Why when going to the hospital for examination, the medical staff has been emphasizing:People who are too old or too young are not suitable for myopia surgery!
The age at which myopia surgery is appropriate, in general, is18 to 45 years old。Why are myopia surgery not suitable for other age groups?
The answer is to ensure the effectiveness of the surgery!
First of all, we need to be clear about one thing: myopia surgery can only "correct" but not "** myopia".
Myopia surgery allows us to achieve clear unaided vision, but,The axis of the eye, which causes myopia, becomes longer, but does not shorten as a result, I have finished the operation,There is also no guarantee that myopia will never increase after surgery
Minors who are developing their bodies and older people who are deteriorating have unstable visual refractionIf you have myopia surgery, you may become nearsighted or presbyopia again soon after surgery.
Because growth is a process of "facing up"!
Newborn babies are hyperopic (about 300 degrees) with an eye axis of about 16 mm. As you grow, your eye axis grows longer and longer, and it doesn't slow down or stop until you become an adult。The refractive state of adults tends to be emmetropic and the eye axis is about 24 mm.
For every 1 mm increase in the eye axis, the degree of myopia increases by about 300 degrees.
In adolescence, the growth of the eye axis is a dynamic process, if myopia surgery has been done at this timeIf the eye axis continues to grow after surgery, it will cause the myopia to deepen, unable to achieve the desired correction effect.
Similarly, even for adults, if the refractive power is unstable within 1-2 years, myopia surgery is not recommended for the time being.
BecauseForty or fifty-year-olds will naturally be "old-fashioned"!
Generally at the age of 40-50 yearsThe physiological regulation function of the human eye is weakened, and the ability to see near objects will be reduced, which is called "presbyopia"., which is what we commonly call "presbyopia".
Presbyopia is a normal physiological phenomenonAfter the age of 65, most people will completely lose the ability to adjust their eyes, and the presbyopia will be fixed at about 300 degrees.
BecausePresbyopia will continue to deepen, and the diopter will be unstable。Even if you have myopia surgery, you may need to wear reading glasses soon, so it is not recommended for people over the age of 45 to have myopia surgery.
The age limit for myopia surgery is a relative contraindicationThere are exceptions!
People under the age of 18, if:In the near future, the diopter is basically stable, and the ocular condition is suitableConsidering the physical examination and vision requirements for joining the military or individual entrance exams, the age limit may be relaxed as appropriate.
People who are above or close to 45 years of age, if:I have a strong willingness to take off my glasses, and I understand and accept that I still need to wear reading glasses in the futureYou can also have myopia surgery. When formulating the surgical plan, doctors usually reserve 50-100 degrees of myopia for people of this age group, which can alleviate the fatigue of presbyopia in the early stage, or design different degrees for their eyes, the main eye is completely corrected to see far, and the non-main eye retains a certain degree of myopia to see near.