How to choose sunglasses for Mengwa in holiday travel?

The sunshine in winter is equally dazzling. Parents put sunglasses on their children when they go out to play during the holidays. After all, in addition to eye protection, sunglasses also have the property of "crazy cool"! With both face value and strength, how can people not love it? However, are the sunglasses bought by parents up to standard? Unqualified sunglasses can't protect the eyes, but also have a bad influence on the children's eyes. Zhou Jun, deputy director of CUHK optometry eye health management office, reminds you that you must pay attention to the following points when purchasing sunglasses ~

Tips for buying sunglasses

Lens quality

The main purpose of wearing sunglasses is to prevent ultraviolet rays, which is often said to prevent ultraviolet rays. Children's eyes are more fragile than adults. Short-wave ultraviolet rays in ultraviolet rays, with high energy, will damage the corneal epithelium outside children's eyes, while long-wave ultraviolet rays have strong penetrating power, which will directly damage the lenses in children's eyes and even the retina. When parents buy sunglasses, it is best to choose lenses that can isolate UVA and UVB ultraviolet rays at the same time, so as to protect their children's eyes best.

It is recommended to choose PC lens or resin lens as lens material, and never choose glass, because even the cleverest child will have a "bear". After all, playing is a child's nature. If you accidentally fall down, choose a lens with greater hardness and strength, which can prevent the child from being scratched by the lens.

Lens color

Gray or brown is recommended for lens color, because gray only reduces the light intensity and makes the light lower, and does not obviously change the color of things, which is beneficial to the development of children's eyes. Brown is close to gray and has some characteristics of gray lenses. High-energy blue light in sunlight can damage the retina, and brown can also filter high-energy blue light to some extent.

Frame material

The picture frame should be soft and elastic, and it is best to have some elasticity to protect the delicate skin of the child from being scratched. Do not choose a metal frame. It should be noted that because the frame will contact the child's skin for a long time, it is necessary to ensure that the frame passes the desensitization test and there is no allergic phenomenon.

Image frame

The choice of frame should pay attention to "big" and "light", which can fit the child's face. Because ultraviolet rays can be reflected, matching a larger frame that fits the face can reduce ultraviolet rays from entering the child's eyes from the edge of the frame. Choosing a lighter frame can reduce the burden on children's nose and ears, and can also avoid throwing away heavy sunglasses when children feel uncomfortable. ...

Sunglasses function

The outdoor sunshine is strong, and the children themselves have large pupils and a large amount of light, which makes them more afraid of light than adults. Children's eyes are more delicate than those of adults. Ultraviolet rays can directly damage the retina through the lens while damaging the lens, aggravating the damage. Qualified sunglasses can block ultraviolet rays, protect children's eyes from ultraviolet rays and prevent glare caused by strong light.

It is important to note that children under 3 years old are not recommended to wear sunglasses at the peak of visual development, and should be mainly sheltered; Children aged 3-6 are in the period of perfect eye development and can wear sunglasses, but they need to be controlled within 2 hours; Children over the age of 6 should also pay attention to controlling the time of wearing sunglasses and use them as needed.

Comparison of advantages and disadvantages of sunglasses

Some parents think: "How can children's sunglasses be so particular? I don't expect to wear it for long. It is good to buy a toy sunglasses with special style and' good quality and low price' on the roadside. Taking children out in summer can also block the sun? "

Eye Health Jun: "Many parents have this idea, but the main purpose of children wearing sunglasses is to protect their eyes, not just to decorate them. Toy sunglasses are not only impractical, but also have adverse effects. "

The lenses of "toy" sunglasses are mostly just dyed plastic pieces. Although the surrounding environment will darken after wearing it, the pupil of the child will become larger because the light penetration and illumination become smaller. The dyed sheets have no anti-ultraviolet effect, which will not only reduce ultraviolet rays, but also let more ultraviolet rays enter the child's eyes, which is not good for the eyes. The frame of "toy" sunglasses is generally hard plastic and has no elasticity, so it may break with a buckle. If the child falls, it is easy to poke his eyes.

Precautions for wearing sunglasses

1. Children love to play, wearing sunglasses is easy to fall off, and glasses rope can be added.

2. Children should wear sunglasses when ultraviolet rays are strong, and don't wear them when ultraviolet rays are weak. Generally speaking, it is not necessary to wear sunglasses in winter, early morning or evening. Every year from April to 10, and every morning from 10 to afternoon 16, when ultraviolet rays are strongest, you should wear sunglasses in moderation.

You don't need to wear sunglasses when you enter the room, because it is darker indoors than outdoors. If you wear sunglasses, it will lead to the tension of children's eye adjustment and cause eye fatigue.

4. Children with family hereditary diseases, such as high intraocular pressure and glaucoma, are forbidden to wear sunglasses. Because of wearing sunglasses, the pupil of the eye becomes larger and the angle of the room shrinks, which leads to an increase in intraocular pressure, which may aggravate the condition.

5. When there are ultraviolet rays in rainy days, you should also pay attention to protection, but the light is weak in rainy days. It is recommended to wear sunglasses with high light transmission, or cover them with hats and umbrellas.

6. Keep sunglasses lenses clean. It is not advisable to wipe it by hand. It's best to wash it with water and dry it.

7. Sunglasses are not resistant to high temperature. Pay attention to maintenance. Don't leave it in the car at will, and don't wash it with hot water.

8. Sunglasses are mostly PC sheets or resin sheets, which belong to organic lenses. After oxidation, the anti-ultraviolet effect will gradually weaken, and it usually needs to be replaced in 2 to 3 years.

Knowing this knowledge about children's sunglasses, will you be surprised to choose sunglasses for your children? There's too much pressure. Next time you buy sunglasses, don't forget these dry goods that Yan Jianjun taught you ~