10/08/2024
Eight Precautions for Choosing Sunglasses
Firstly, observe whether there are scratches, impurities, bubbles, or stripes on the lenses, and check the outer packaging of the sunglasses. Regular sunglasses should be labeled with the product name, color, diameter, quality level, manufacturer name, and trademark. Sunglasses with anti UVA, UVB, and CE markings on the mirror or tag can ensure a certain degree of UV blocking.
Secondly, when choosing sunglasses, try wearing them to see if there is any feeling of dizziness or headache. There are some nearsighted sunglasses on the market that indicate the degree of myopia, but because indicators such as pupil distance vary from person to person, it is best for consumers not to choose these sunglasses with degree without professional guidance.
Thirdly, hold the two corners of the sunglasses with your hands towards the fluorescent lamp, and let the reflective strip of the mirror surface roll smoothly. If you find that the shadow of the fluorescent lamp reflected by the mirror surface appears wavy or twisted, it proves that the lens is not flat, and such a mirror surface will damage vision.
Fourthly, the lenses should be flat and have high transparency. There are two types of materials for solar lenses: glass and resin, and the best ones should use polarized lenses. It is made of lightweight and precise synthetic resin, similar to contact lenses, and is composed of 7 layers of thin sheets. The outermost two layers are super hard wear-resistant layers; The second and sixth layers are anti shatter reinforcement layers; The third and fifth layers are ultraviolet filtering layers, and the middle layer is a polarizing filtering layer. Polarized lenses can effectively filter out reflected light and harmful ultraviolet rays, and have functions such as shatterproof and anti-wear.
Fifth, the color of sunglasses should not only be matched according to one's skin tone, face shape, and clothing, but also chosen according to the place of entry and exit. Generally, dark gray is preferred, followed by dark brown, brown, and black, and blue and purple are the worst because these two types of lenses will transmit more ultraviolet light. Gray lenses can evenly absorb any color spectrum, and the scenery seen after wearing the lenses will only darken without significant color difference; Tea colored lenses can filter out a large amount of blue light, improve visual contrast and clarity, and are particularly effective when worn in severe air pollution or foggy conditions. They can also block the reflected light from smooth and bright surfaces of objects, allowing wearers to see fine details clearly. This is the driver's choice; The dark green lenses absorb heat and provide a cool feeling, but their transparency and clarity are low, making them suitable for wearing in the sun and not suitable for driving; Try not to use yellow, orange, and light red as much as possible.
Sixth, the color depth of sunglasses lenses is divided into 15%, 34%, 50%, and 70%. 15% can be worn both indoors and outdoors; 34% are suitable for ordinary outdoor environments; 50% suitable for scorching sun and seaside; 70% of them belong to special purposes such as welding. How to choose the color depth of sunglasses? A simple self testing method is to put on sunglasses in front of a mirror, with the limit of being able to vaguely see one's own pupils (also known as "pupils", the person in the pupils is the person looking at it). If the color is too light, the filtering effect will be too small; Colors that are too dark can affect vision and weaken color perception.
Seventh, in addition to reducing strong light stimulation and making the eyes comfortable, the main purpose of wearing sunglasses is to prevent UV damage to the eyes. The color of the lens and whether it is UV resistant are two different things. Even if the lens color is dark, it may not effectively prevent UV, so it is necessary to choose lenses with UV protection function. The UV index of sunglasses is usually between 96% and 98%.
Eighth, regular eyewear stores usually have instruments to test the UV resistance of sunglasses. Through this test, you can know whether the glasses in your hand are helpful for your eye health.
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Specifications Buyer Questions & Answers (10) What is the size of it? The lens width is 142 mm. How is the design of it? It has a goggle style design. Is it durable? Yah, it is made of polycarbonate which is known for its durability.
