How to identify the function of sunglasses with banknotes

by:Timeless Eyeglasses     2021-06-09
u003cbru003eIntroduction: Whether it is an optical shop or a stall in the streets and alleys, you will see a variety of glasses.com/sunglasses-1.html' target='_blank'>sunglasses in various colors. When buying sunglasses, ordinary consumers don't know how to identify whether the seller's sunglasses can protect against ultraviolet rays. This makes it easy to buy inferior products. Buying sunglasses depends on the quality of their lenses, especially the anti-ultraviolet function of sunglasses. So, how to identify whether sunglasses have anti-ultraviolet function? According to experts, the main function of sunglasses is to prevent glare and string light, especially UV radiation, to protect eye health from damage in summer. Therefore, you must pay attention to whether there are 'UV400' and 'UV protection' signs on the lens and packaging when purchasing, and also do a UV protection identification test. Simple identification method: Take a hundred yuan banknote and put it into the light zone of the purple light. After turning on the light switch, the pattern on the renminbi will be displayed in yellow under the light, which is very clear. At this time, put the sunglasses on the RMB, and the pattern will disappear immediately due to the anti-UV effect, which shows that the sunglasses have the function of blocking ultraviolet rays. If the pattern does not disappear in the reflective area, it indicates that the sunglasses do not have the function of preventing ultraviolet rays. Conclusion: Buying sunglasses depends on the quality of their lenses, especially the anti-ultraviolet function of sunglasses. When buying, be sure to pay attention to whether there are 'UV400' and 'UV protection' signs on the lens and packaging, and also do a UV protection identification test. Article Title: How to Use Banknotes to Identify Sunglasses Function Article Arrangement:
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