It is a very tough task to select kid's eyeglasses
One of the reasons why children's prescriptions change within a short interval of time is the improper adjustment of different optical powers like pupillary distance, horizontal axis, astigmatism axis, etc. All the specifications prescribed by the doctor are often not adjusted accurately leading to problems in vision, which ultimately leads to the change of optical power. Making prescription eyeglasses is all about adjusting the light properly. If the light enters the retina of a child in the recommended way, the power will not change frequently.
The second reason should be the irregular habits of wearing eyeglasses .Not only kids but also many adults are not fond of wearing eyeglasses and that is a reason their optical power changes within a short interval. Select cheap prescription glasses and see that the wearer is comfortable and help him get into the habit of wearing glasses. Once the habit is developed, it will not be a tough job at all to make your child wear glasses.
In short, you should pay great attention to the quality of the lens if you are planning to purchase cheap prescription glasses for kids. If you really care about the health of your kid's eyes, you should not sacrifice the lens quality for money. And before getting a pair of prescription eyeglasses for your kid, you should know their choices in that children care more about looks.