Myopia is a common vision problem, and in order to control the progression of myopia, defocus glasses have become one of the preferred products for parents. However, some children do not control their myopia well after wearing defocused glasses. Here's a look at the reasons that might lead to this.
1. Failure to insist on wearing defocus glasses for a long time
The principle of defocus glasses is to control the progression of myopia through the defocus of myopia around the retina periphery. Therefore, the longer you wear it, the better the control. It is generally recommended to wear them for at least 12 hours a day, and some children only wear glasses during class or when they can't see clearly, which has little effect on controlling myopia.
Second, your child's lenses may not be paired correctly
There are many tiny lenses embedded in the defocused-frame glasses, which some children may find uncomfortable wearing. Although most children will gradually get used to it after wearing it for a while, if the prescription is forcibly lowered to improve comfort, it may seriously affect the control of myopia.
3. Wear or unfit of lenses will also affect the control of myopia
Most of the defocal lenses on the market are PC lenses, which are impact-resistant and unbreakable, but not wear-resistant. When the surface of the lens is worn, the refractive effect of the microlens is affected. Therefore, we need to get into the habit of taking off the glasses with both hands, and clean the lenses properly and avoid using tissues or clothing.
In addition, a child's inappropriate frame selection or incorrect lens processing can also lead to unsatisfactory myopia control. It is important to choose the right frame, to measure the interpupillary distance and pupil height correctly, and to process the lenses correctly. In addition, incorrect wearing positions can also affect the positioning of the out-of-focus area, reducing the effectiveness of control. It is necessary to regularly check and adjust the position of the frames.
Fourth, some children's conditions may not be suitable for defocus glasses
For some very young children, with a high family history of myopia, large astigmatism, and abnormal visual function, the control effect of defocus glasses may be skewed. For these children, it may be better to adjust the myopia prevention and control regimen in time, such as using orthokeratology lenses, defocusing soft lenses, combined with low-concentration atropine, or assisted visual function training.
Defocus glasses are a safe and effective myopia prevention and control product, but there are some rules and restrictions that need to be paid attention to during use. After wearing defocus glasses, children must have regular check-ups in strict accordance with the requirements, and adjust the prevention and control plan in time according to the changes in the eye axis and power. If the child's myopia control effect is not satisfactory after wearing defocus glasses, it is recommended to consult a doctor or professional optometrist in time to seek a more suitable prevention and control plan.