Four do not buy sunglasses for children

u003cbru003eSummer is coming soon. Many parents not only buy their own glasses.com/sunglasses-1.html' target='_blank'>sunglasses, but even their children. However, the relevant eyewear experts remind you that you must be careful when choosing sunglasses for your children. You can't just focus on the style, but ignore the quality of the sunglasses themselves. Do not wear the following four types of unqualified sunglasses. 1. Sunglasses with anti-ultraviolet function. Good sunglasses lenses can block more than 99% of ultraviolet rays, while lenses marked with UV400 can block 100% (99.99%) of ultraviolet rays. Wearing sunglasses with poor UV protection can make the eyes look like in a dark room. At this time, the pupils will become larger, and the residual ultraviolet rays will be injected into the eyes in large quantities, causing damage to the eyes. Good to go to the specialty store to buy or buy in the well-known glasses network or flagship store. You must not buy enough from the small stalls. Although those sunglasses can also block ultraviolet rays, the lenses are not made in place, which means they are substandard. Do not buy them because they are cheap. Inferior eyes can cause different degrees of damage to the eyes. 2. Sunglasses with unqualified transmittance. After wearing this kind of sunglasses, it will cause traffic signal identification obstacles, which can easily cause traffic accidents. All sunglasses, including professional driving glasses, sports glasses, fishing glasses... (except near-sighted glasses and reading glasses) The easy way to identify is to put the sunglasses in front of your eyes and observe the distant objects through the lens, such as window frames or door frames Wait, and then move the glasses up and down back and forth, the target should not swing and wavy deformation. 3. Sunglasses without category identification. Sunglasses are generally divided into three categories, namely, sun-shading mirrors for sun protection, light-colored mirrors for decoration, and special mirrors for preventing snow blindness or water-proof plane radiation. If there is no product category mark, consumers cannot correctly identify the purpose of sunglasses when buying, which will affect the effect of use. 4. Sunglasses whose resistance performance does not meet the requirements. The lens is easily broken when impacted by an external force, and the fragments can cause fatal damage to human eyes. The material of the frame is also very important. Generally, there are plates, aluminum-magnesium alloys, and pure titanium. Different needs have different requirements for the sun. There are polarized sports mirrors, polarized driving mirrors, and polarized fishing glasses that are specially used for sports. When buying, you can ask about the professional use of sunglasses. Experts remind consumers that when buying children's sunglasses, you should go to regular stores to buy well-known brands; you should try them first when buying, and compare whether the color difference changes before and after wearing them are obvious, so that the colors of the objects seen after wearing the sunglasses are not distorted Appropriate.

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