When is it recommended for children to wear glasses, when they must wear them, how exactly should they be dispensed, and should they be worn often or only indoors?
On the Internet, doctors have different accounts, and many parents are confused about these problems.
Some people say that myopia should be quickly dispensed with glasses, and glasses can prevent development; Some people also say that you can't wear glasses, and once you wear glasses, you will wear them deeper and deeper.
In fact, the above two statements are not correct, after the eye myopia, the shape of the eyeball has changed, from spherical to ellipsoidal with a long diameter before and after, and looking near and far will produce peripheral imaging lag, which is the reason for the accelerated development of myopia.
For ordinary glasses, wearing or not wearing, can not change the surrounding imaging lag, that is, wearing glasses or not wearing glasses, myopia will increase, can not be used as an effective means of myopia prevention and control.
How exactly should I dispense glasses? Hear me out.
Purpose of glasses:
1. Add points for myopia prevention and control: reduce the growth rate of the eye axis
2. Improve visual function: clearer vision
Types of glasses:
Myopia: OK lens, peripheral defocus lens, ordinary single vision lens Non-myopia: low-degree convex lens flat peripheral defocusing lens
Ordinary single vision lens:
Ordinary myopic glasses have peripheral imaging lag
Who is suitable for single vision lenses:
Juvenile amblyopia, strabismus, large astigmatism, peripheral myopia, defocus
Orthokeratology lenses:
Orthokeratology lens, also known as OK lens, prevention and control score of 50~55 points, the principle is similar to peripheral myopia defocusing lens, through night wearing, a defocusing ring is shaped on the cornea, which can be maintained for a day, and then continue to wear at night, and so on.
Children over 8 years old with myopia will be clinically preferred OK lenses, which can help children remove lenses during the day, prevention and control and correction 2-in-1.
Defocus soft lens:
Worn during the day, the prevention and control score is 40~50 points, because it is a daily throwing type, compared with orthokeratology lens care is much simpler, the following figure shows the peripheral imaging effect of the defocusing soft lens.
AUGUST:
RGP can be understood as orthokeratology lenses worn during the day, with a prevention and control score of 40~50 points, which also requires careful care.
RGP is preferred for children with high myopia and astigmatism, especially young children with myopic amblyopia.
Recommended order of optical correction:
In the case of meeting the wearing conditions, first recommend orthokeratology lenses, can not wear can choose defocus soft lenses, if the child is more resistant to these two contact glasses, you can choose functional frame lenses, these three belong to the defocus method, the last is ordinary glasses.
When should I get glasses?
The naked-eye visual acuity ≤ 0.6, glasses should be dispensed with;
0.6< naked-eye visual acuity ≤ 0.8, in order to obtain the prevention and control points of peripheral defocusing lenses, you can actively dispense glasses;
The naked-eye visual acuity > 0.8, which can be combined with the child's wishes.
Do frame glasses need to be worn all the time?
≤ 125 degrees of myopia, you can wear glasses only when you need fine vision in class, etc., and you can see near and outdoor activities without glasses.
If the child is wearing functional frame glasses, you can see far and near indoors, wear glasses when looking at the blackboard and writing homework, and only take off the lenses when outdoor sports activities are inconvenient;
When outdoor activities are sunny, the pupils of the eyes are small, and the small hole effect can compensate for low-grade myopia, and the child usually has no problem seeing. When the pupil is small, the effect of peripheral defocus is relatively weak, the efficiency is low, and it is inconvenient to wear glasses for physical activities.
150 degrees ~ 250 degrees myopia, defocusing lens: recommended to wear often; Ordinary glasses: if there is implicit oblivia, high AC/A, etc., you can wear glasses when looking far, and do not need to wear near vision; If there is exotropia, you need to wear glasses often to avoid the development of exotropia;
For myopia above 250 degrees, it is recommended to wear glasses often.
How can children who are not yet myopic use glasses to prevent myopia?
Farsighted reserve of more than 50 degrees, no need to wear prophylactic glasses; 50 degree farsightedness reserve ~ 25 degree myopia, you can use flat light peripheral defocusing lens, wear at home;
When using a teleimaging device, a low-degree convex lens or a fog peripheral defocus lens can be superimposed for television treatment.
Well, today's sharing is here, about how to match glasses, do you still have anything you don't understand? Welcome to leave me a message, I will help you answer and guide.