1. How to distinguish the quality of sunglasses lenses?
The quality of sunglasses lenses directly determines people's viewing effect. Only lenses with good quality and materials can be used comfortably and the glasses will not be damaged.
Some counterfeit sunglasses, if worn for a long time, the glasses will be painful and uncomfortable, and some may even cause vision damage.
Therefore, when we distinguish the quality of the lens, we can point the sunglasses at the light to check whether the surface of the sunglasses lens is smooth, free of bumps, wear marks and bubbles.
Lenses with the above problems will often cause discomfort symptoms such as dizziness and damage the eyes. When purchasing, you should avoid the selection of these lenses.
2. How to tell if the lens of the sunglasses is deformed?
In addition to paying attention to the material and workmanship when purchasing sunglasses lenses, you should also pay attention to whether the lenses are deformed. Deformed sunglasses will affect the viewing effect and cause great damage to vision.
Of course, to identify whether the lens is deformed, we can first carefully compare the two lenses of the sunglasses to see if the warpage of the lenses is the same. Then, hold the sunglasses 45 cm away from the eyes, and observe the surrounding vertical and horizontal lines through the glasses. Then move the glasses up and down, if the straight line is distorted or swings, it means that the lens of the sunglasses is deformed. Myopia lenses can also be selected by this method.
3. How to distinguish the quality of sunglasses frames?
In addition to the crucial lens in sunglasses, the quality of the frame is also an important factor affecting the quality of the sunglasses. Usually a good frame is comfortable and relaxed to wear, will not affect the skin, and will not loosen or slip sideways after wearing for a long time.
The opposite is true for inferior frames. The choice of frame is also critical when choosing sunglasses.
First of all, regarding the metal sunglasses frame, we should pay attention to whether there are cracks in the welding point and whether it is strong; we can dig it with our nails to see if there will be scratches on the paint surface; for the sunglasses frame made of sheet material, carefully observe its surface Whether there are plastic particles, whether there are scratches, and whether it is rough. Whether the frame is distorted, etc.
Paying attention to these details is helpful for choosing a good pair of sunglasses.
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4. How to tell whether sunglasses are UV-resistant?
As we all know, the biggest feature of sunglasses is UV protection. And a sunglass with excellent performance has an anti-ultraviolet rate of more than 99%.
Good anti-ultraviolet effect is a crucial factor for us to decide whether to buy sunglasses. Therefore, it is necessary to test the UV protection effect of sunglasses.
Generally, 100% UV protection is UV400. To test whether the sunglasses have anti-ultraviolet function without an instrument, first take a hundred yuan, put the sunglasses lens on the anti-counterfeiting watermark, and use a money detector pen or money detector to irradiate the anti-counterfeiting watermark on the lens, if it is still possible If you see the anti-counterfeiting watermark, it means that the sunglasses are not UV-resistant; if you can’t see it, it means that the sunglasses are UV-resistant.
5. How to tell whether the sunglasses are polarized sunglasses?
Purchasing polarized sunglasses is a hobby of many friends, because polarized sunglasses can effectively exclude and filter the scattered light in the beam.
Let the light enter the visual image of the eyes on the light transmission axis on the right track, so that the vision is clear and natural. Just like the principle of blinds, the light is adjusted to the same direction and enters the room, which naturally makes the scenery look soft! And it can filter out 99% of glare and random reflections and 96% of harmful ultraviolet rays.
It makes people's eyes less prone to fatigue when they are active under strong light for a long time, and achieves the function of real protection, and can make things seen more clearly and three-dimensionally.
Therefore, it is more suitable as the first choice for driving, fishing, cycling, hiking, mountain climbing and other activities.
The easiest way to distinguish is a mobile phone with LCD screen, observe the LCD screen through polarized sun lenses, and rotate the LCD screen at the same time, the LCD screen you see will turn black with the rotation, this is because the polarized lens filters the single light emitted by the screen Caused by the direction of the light, then congratulations, is the real polarized sunglasses.
Of course, it will be more effective to use a large-screen LCD monitor.
6. How to identify the details of the sunglasses?
In addition to the important position of sunglasses, attention should also be paid to the details. You can observe whether the two sides of the stipules of the sunglasses frame are symmetrical; observe whether the two temples are flat, and place the frame flat on the table to see if the contact point is suspended. If one side is high and the other is low, you must ask a professional Adjust the temples of the sunglasses; there are also open and close temples, feel the elasticity.
Usually everyone thinks that the tighter the better, it is actually wrong. It only tells you that the screw is not lubricated enough, which may easily cause damage to the temples. .
7. How to distinguish the quality of sunglasses can be seen on the tag
Generally, regular sunglasses have a small tag, which contains quite a lot of information about the quality of the sunglasses, such as: the place of origin of the sunglasses; For UV effect, generally UV400 is the best, and UV380 is slightly worse; information about the materials of sunglasses lenses and frames, etc.
8. How to tell if the sunglasses are good or bad? You can read the small words on the temples
Most genuine sunglasses will have positions, letters, etc. marked on the temples. In addition to printing the item number, specification and size, the brand name is also printed. Many trademark-registered frames are also printed with the word "R", and if they are second-class or third-class products, the words "2" or "3" are printed on the frame to publicly tell consumers that this is not a genuine product. Protect the reputation of manufacturers and products. Therefore, when purchasing sunglasses, you can pay more attention to the words on the temples to help you choose sunglasses.
Believe that people who read this article already know how to choose sunglasses. Follow me for more knowledge.
