Sunglasses have become a must-have item to follow the trend of the generation of cool. But not everyone is so good at buying sunglasses. In fact, in addition to reducing the glare of sunglasses, the eyes are comfortable, the main purpose is to prevent ultraviolet rays from causing damage to the eyes. To this end, I teach you how to choose a pair of sunglasses that suit you and protect your eyes in 2020.
Choose sunglasses steps/methods
1, choose sunglasses material
The lens is made of glass and resin, and it is best to use polarized lenses. It is made of the same lightweight and precise synthetic resin as contact lenses. It is made up of seven layers of sheets. The outermost two layers are super-hard wear-resistant layers; the second and sixth layers are shatterproof layers; the third and fifth layers are UV rays. The filter layer, the middle layer is the polarizing filter layer. Polarized lenses can effectively filter out reflected light and harmful ultraviolet rays, and have the functions of shatterproof and anti-war. It is also the material of choice for the most popular sunglasses.
2, choose sunglasses color
First, you should wear sunglasses according to your skin color, face shape, and wearing.
Secondly, you should choose the color of the sunglasses according to the place of entry and exit.
In general, the black, brown, and gray filters have good filtering effects; the gray lenses absorb evenly in any chromatogram, and the scenes seen after wearing the mirror will only darken without a significant color difference; the brown lenses can filter out a large amount. Blu-ray can improve visual contrast and sharpness, especially when exposed to heavy air or fog.
3, choose the right color shade of sunglasses
The simple self-test method is to wear sunglasses on the mirror so that you can see your own glutinous rice as a limit. If the color is too light, the filtering effect is too small; if the color is too dark, it affects the vision and weakens the color. This year’s popular colorful light-colored sunglasses should not be used in the seaside water activities, in the strong snow，and in the sun with strong sunshine, but should be worn with sporty sunglasses, most of which are saturated with saturated colors, which can be absorbed or Reflect more visible light.
4, choose UV protection sunglasses
The color of the lens is different from whether it is UV-proof. Even if the lens is dark, it may not be effective against UV. Only sunglasses with UVA, UVB and CE marks on the mirror or tag can ensure a certain UV blocking. The UV index is usually between 96% and 98%. Generally, regular optical shops will have instruments that can detect the ability of sunglasses to resist ultraviolet rays. When buying, you may wish to test your sunglasses.
5, see if the lens is flat
Hold the two corners of the sunglasses against the fluorescent lamp, and let the reflective strips of the mirror roll gently. If the specular reflection of the fluorescent light appears wavy and twisted, it proves that the lens is not flat, and such a mirror will damage the vision.
Also observe the lens for scratches, impurities, bubbles, streaks, etc.
6, try to see if there are symptoms
The most common symptoms of discomfort are dizziness and headaches.
There are some myopia sunglasses with the indicated degree. Because the distance index varies from person to person, consumers should not choose this kind of sunglasses without the guidance of a professional doctor.
Check the outer packaging of the sunglasses. Regular sunglasses should be marked with the name, color, diameter, quality level, manufacturer name ，and trademark. At the same time, anti-UV sunglasses should pay attention to whether there is an anti-UV mark.