Sunglasses can be divided into polarized sunglasses and ordinary sunglasses according to their functions.
Polarized sunglasses:
The lens can effectively block sunlight and ultraviolet rays. On this basis, there is also a polarizing film layer, which can block light in a certain direction, so as to achieve the effect of anti-glare.
Ordinary sunglasses:
Lenses are mainly tinted lenses, which can not prevent glare by reducing light transmittance, blocking sunlight and ultraviolet rays.
What is polarized glasses?
Polarized lenses are manufactured according to the principle of polarization of light. In addition to preventing ultraviolet rays and reducing the intensity of light, they can also filter out glare, allowing light in a specific direction to enter the eyes through the light transmission axis to form a visual image, which can effectively suppress the interference of outdoor cluttered light sources and allow direct viewing. The sun is not dazzling, and the vision is clearer.
In layman's terms:
Polarized function lenses are like blinds installed on the eyes, allowing only specific and comfortable light to enter, and suppressing the interference of cluttered light sources.
There is no difference in appearance between polarized sunglasses and ordinary sunglasses, but the visual effect after wearing them will be different.
Which scenes are polarized sunglasses suitable for?
Water sports (not fishing during office hours)
fishing (not fish farming)
driving (not driving fast)
Playing golf (playing badminton, tennis, anything)
Skiing, camping, rock climbing, mountain climbing
It can even be applied to medical fields such as eye diseases and surgery
Can people with prescription eyes wear it?
able. For myopic people, it is very necessary to choose a pair of sunglasses that can match the degree. At present, some sunglasses can be equipped with prescriptions, but there are still many restrictions when dispensing glasses. For example, if you want polarized sunglasses, the customization cycle can be as short as 7 days and as long as 25 days. Harm, waiting online is very urgent!
With the development and maturity of lens production technology, lenses with polarizing function and the advantages of off-the-shelf lenses have appeared on the market now! It can be said that it is very attractive. (except some customized products)
How to choose polarized sunglasses that really work?
(1) Check the polarization ratio
Polarization rate is the most important parameter to evaluate the polarizing function. Generally speaking, the higher the polarization rate, the stronger the ability of the lens to block glare, reflected light and other stray light; the polarization rate of excellent polarized lenses on the market can reach more than 99%, ouch, The performance is not bad~
(2) Understand the polarization process of lenses
In the past, the sandwich pressing process may have problems such as inaccurate prescriptions and excessively thick lenses. The new fusion process using "integrated fusion process" is more accurate and firmer, less prone to rainbow patterns, and at the same time makes the lens lighter and thinner. (The chemical reaction bonding between the polarizing film and the resin is less likely to delaminate and fall off than the ordinary glue bonding process, and the film layer is evenly distributed and the object is clearer.)
(3) Choose polarized sunglasses with a coating process on the surface
The coating process on the surface of the lens makes the polarized lens more divided. The vast majority of lens manufacturers do not coat the lenses of polarized sunglasses, and the waterproof, oil-proof and dust-proof performance is extremely poor; in fact, lens manufacturers themselves have excellent coating technology, which can also be used on polarized sunglasses lenses to make the lenses more usable ,more durable.
(4) Anti-ultraviolet effect
Don't forget that polarized sunglasses are also sunglasses, but there is a polarized effect on the sunglasses, which is the icing on the cake. So the basic conditions that sunglasses need to have, it must also have. An excellent polarized sunglasses also needs to reach UV380 or UV400, and the UV transmittance is 0.
Verify Polarization functionality?
This thing can be tested by yourself!
Here are a few pairs of polarized sunglasses:
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