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Are Polarized Lenses Necessary for Sunglasses?

Are Polarized Lenses Necessary for Sunglasses?


We all know that sunglasses help protect our eyes from UV rays and generally reduce eye strain. A question that seems to come up a lot is whether it's worth paying extra for polarized lenses, The answer is: they're totally worth it!


What is the Difference between Ordinary Sunglasses and Sunglasses with Polarized Lenses?


Nowadays, many sunglasses are made with polarized lenses. Because when driving, polarized sunglasses are more effective.


Ordinary sunglasses take dyed lenses, which can only reduce the intensity of light but cannot completely block harmful light so that glare, refracted light and scattered light can enter the eyes as well.


Polarized lenses are polarized and can completely block the glare caused by various factors such as scattering and reflection, filter out glare, refracted light and scattered light, and even completely block out ultraviolet light. Polarized lenses absorb only the reflected light of the object itself, thus truly presenting the object seen and making the field of vision clearer. As one type of fashion item, it also plays the role of eye protection.


As for ordinary sunglasses lenses, what color the lens is, the object will be covered with whatever color. Especially when driving, the recognition of red and green lights will produce a huge chromatic aberration, and may even be unable to recognize the red and green lights. Therefore, it is best to choose polarized sunglasses for driving.

 


When are Polarized Lenses Suitable for Use?


Polarized lenses are lenses that only allow light from a specific polarization direction in natural light to pass through. Because of its light filtering effect, seeing things with them will be darker. In order to filter out the harsh light of the sun shining in equal directions on water, land or snow, a special coating in the vertical direction is added to lenses which are called polarized lenses.


Polarized lenses are best suited for outdoor sports, such as: water sports activities, skiing or fishing. However, when driving, it is not recommended to use polarized lenses if the windows are already polarized.


Nowadays, polarized lenses are mainly 1.60 with thicker lenses. So polarized lenses are not suitable for people with myopia of over 600 diopters.


How to Choose the Color of Polarized Lenses?


Polarized lenses have a layer of gray polarized fiber in the middle, so the base color is gray. The most popular colors for polarized sunglasses are: greenish gray glasses, gray eyeglasses, yellow eyeglasses and tawny eyewear, while blue eyeglasses and blue-green eyewear are more special. Except for special requirements (such as traffic signal recognition, which requires clear discrimination of red, green and yellow), you can choose sunglasses with polarized lenses according to your preference.

 


How to Choose Polarized Lenses with real effect?


1. Check the polarization rate


Polarization rate is the most important parameter to evaluate the polarization function of polarized lenses. Generally speaking, the higher the polarization rate, the stronger the function 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%.


2. Choose qualified polarized sunglasses


If the lenses are not labeled with the instructions of the polarized lenses and the instructions are not marked on the polarized sunglasses, please do not buy them. Generally speaking, the label of qualified polarized sunglasses will be marked in the obvious position of the sunglasses. Some businesses do not mark out the label is to deceive you that ordinary sunglasses are polarized sunglasses. In general, polarized sunglasses are characterized by obvious static electricity label.


3. Choose polarized sunglasses with a coating process on the surface


Coating process on the lens surface is able to add some points to polarized lenses. The vast majority of lens manufacturers do not add lens coating to polarized sunglasses so that waterproof oil and dust resistance performance is extremely poor. In fact, excellent coating process can be used on polarized lenses, which can make the lenses better and more durable.


4. UV protection effect


Polarized sunglasses are one kind of sunglasses, just have polarized effect on the basis of ordinary sunglasses. So polarized sunglasses need to have the basic functions of ordinary sunglasses. A pair of excellent polarized sunglasses also need to reach UV380 or UV400 whose UV transmission rate is 0.