Is the quality of Kosha Rose Sebert sunglasses good?

Inferior sunglasses can't see clearly and can't resist ultraviolet rays. It causes pupils to dilate and the lens of the eye absorbs more ultraviolet rays, so you must choose a reputable store to buy it. So what should I pay attention to when buying sunglasses?

First observe whether the lens has scratches, impurities, bubbles and stripes, and check the outer packaging of sunglasses. Regular sunglasses should be marked with product name, color, diameter, quality grade, manufacturer's name and trademark. Sunglasses with anti-UVA, UVB and CE signs on the mirror or tag can guarantee to block some ultraviolet rays.

Second, try wearing sunglasses to see if you feel dizzy or have a headache. At present, there are some myopia sunglasses with degrees on the market, but because the pupil distance and other indicators vary from person to person, consumers had better not choose these sunglasses with degrees without professional guidance.

Third, point the two corners of the sunglasses in your hand at the fluorescent lamp and let the reflective strip of the mirror roll gently. If you find that the shadow of the fluorescent lamp reflected by the mirror is wavy and twisted, it proves that the lens is uneven, and such a mirror will damage your vision.

Fourth, the lens should be flat and transparent. The materials of sunglasses are glass and resin, and the best sunglasses should be polarized lenses. It is made of light and precise synthetic resin like contact lenses, and consists of seven thin layers, the outermost two of which are superhard wear-resistant layers; The second layer and the sixth layer are shatterproof reinforcement layers; The third and fifth layers are ultraviolet filter layers, and the middle layer is polarization filter layer. Polarized lenses can effectively filter reflected light and harmful ultraviolet rays, and have the functions of shatterproof and wear resistance, so they are the most popular sunglasses.

Fifth, the color of sunglasses should be matched according to skin color, face shape and wearing, and should also be selected according to the place of entry and exit. Generally speaking, black, brown and gray have good filtering effect; Gray lenses can absorb any color spectrum evenly, and the scenery you see after wearing them will only darken without obvious color difference; Brown lenses can filter out a lot of blue light and improve visual contrast and clarity, especially when the air pollution is serious or foggy.

Sixth, what shades of sunglasses are suitable for us? The simple self-test method is to put on sunglasses in front of the mirror and let yourself see your pupils vaguely. If the color is too light, the filtering effect is too small; If the color is too dark, it will affect the vision and weaken the color sense. Colorful and light-colored sunglasses, which are popular this year, should not be used in seaside water activities, snow with strong reflection or strong sunshine, but should be worn with sports sunglasses, mostly colorful and saturated, which can absorb or reflect more visible light.

Seventh, in addition to reducing the strong light stimulation and making eyes comfortable, the main purpose of wearing sunglasses is to prevent ultraviolet rays from hurting eyes. The color of the lens and whether it protects against ultraviolet rays are two different things. Even if the lens is dark, it may not be able to effectively resist ultraviolet rays. So be sure to choose lenses marked with anti-ultraviolet function. Usually the UV index of sunglasses is between 96% and 98%.

Eighth, general optical shops will have instruments to test the anti-ultraviolet ability of sunglasses. Through this test, you can know whether the glasses in your hand are helpful to your eye health.

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What's the difference between sunglasses

The latest research shows that the shielding degree of different styles of sunglasses to strong light stimulation is very different. As far as the size is concerned, it can be appropriately larger when choosing. Most travel sunglasses have no luminosity and are not limited by pupil distance. A slightly larger mirror can broaden the field of vision, but the weight of the glasses arms should also be evenly distributed on the ears and the bridge of the nose. Generally speaking, it is better for traveling glasses to be slightly larger than ordinary glasses by 4-6 mm..

As far as color is concerned, dark sunglasses can effectively block strong light, and its transmittance in the visible region may be only 10%-30%, while the transmittance of light sunglasses in the visible region is generally 40%-80% (the transmittance of ordinary colorless glasses in the visible region can generally reach 90%-99%). Sunglasses of different colors should have the same effect of blocking ultraviolet rays, and there will be no difference because of the depth of colors.