The heat is unbearable, but there are always some things to go out. As long as you go out, you must face the bright sun in the sky. At this point, of course, you need a pair of stylish and professional sunglasses. But do you really choose the right sunglasses? What are the common misunderstandings of wearing childrens glasses? Let's take a look.
The two major mistakes of buying sunglasses
- Colored glasses ≠ sunglasses
Many people think that as long as there is color, can block the sun, is a pair of qualified sunglasses, in fact, a pair of qualified sunglasses can block strong light, but also can block UV. The main function of the lens color is to block strong light, so that people can see things without dazzling, and can not block ultraviolet light.
- Dark color ≠ strong sun protection
In general, the darker the color of the lens, the stronger the ability to block strong light, but this does not mean that its ability to prevent UV rays is also stronger. Whether the lens can prevent ultraviolet light, mainly depends on its material and coating.
How to choose sunglasses
- Choose sunglasses should look for the UV400 logo
Because the wavelength of ultraviolet light is below 400 nanometers, the logo UV400 indicates that the lens can resist ultraviolet light. When buying sunglasses, do not be cheap, it is best to go to a regular place to buy.
- Choose the right pair of glasses for you
In general, it is best to choose brown, brown and green sunglasses in summer.
- When shopping, you can place the glasses in front of your eyes
Look through the lens at distant objects to see if there are any deformations. At the same time, it is also necessary to see if you can distinguish red, yellow and green colors after wearing sunglasses.
"Special needs" crowd selection precautions
Myopic people are best to choose resin lenses, try to pay attention to whether there is dizziness and other discomfort, it is best to go to a professional eye hospital optometry.
It should also be noted that colored lenses are not suitable for wearing indoors for a long time, so it is necessary to have a pair of ordinary glasses worn indoors.
Children under 6 years of age should not wear sunglasses for a long time, because children in this age group are in a critical period of visual development, too much wearing sunglasses will lead to retinal imaging is unclear, long-term so may have adverse effects on vision development.
The right thing to do is to put it on when the sun is strong and take it off when the sun is weak. You can also choose a sun hat or umbrella to block out the sun.
