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If you want to buy a pair of sunglasses, then there are polarized and non-polarized sunglasses. Are you being introduced by the shopping guide when you buy them? Want to know the difference between polarized and unpolarized sunglasses?

First, the difference between polarized and non-polarized sunglasses

The difference between polarized and non-polarized sunglasses lies in how the sunglasses deal with reflected light. In the environment we live in, there are three kinds of light: direct light reflected light, and diffused light. Among them, diffused light is not usually perceived by us, but it is the most important kind of light that our eyes can see objects; and Because direct light has a fixed light source (such as the sun), as long as a little attention is paid, it will not cause harm to our lives. These common reflectors in life often reflect light suddenly, which will bring a lot of inconvenience to our lives. For example, for a driver, the rear-view mirror in front is an uncertain reflective light source. Water on the roadside or smooth plane objects carried by passers-by can become reflective light sources. These reflected lights may cause trouble or even trouble for the driver. is dangerous.

Polarized sunglasses are aimed at filtering out the reflected glare, which can prevent dizziness, make the vision clearer and reduce visual fatigue when traveling in summer. Unpolarized sunglasses are just the opposite, so the price of polarized lenses is much more expensive than unpolarized ones.

Second, the main use of polarizers

The main purpose of polarizers is to protect the eyes from damage under certain conditions. However, for people who are not very demanding, ordinary sunglasses can be used, because polarized sunglasses are relatively high-end sunglasses. Of course, if you are a car owner who needs to drive, it is better to wear polarized sunglasses when driving, because driving often encounters various glare, polarized sunglasses can block part of the glare, and can also filter out the ground or The strong light reflected from the opposite car body makes the field of vision clearer, reduces visual fatigue, and is conducive to safe driving.

Third, the distinction between polarized lenses and ordinary sunglasses

When purchasing polarized sunglasses, pay attention to the identification. In fact, the difference between polarizers and sunglasses and the way to distinguish them is relatively simple. As long as the two polarized lenses are stacked vertically if the light is not transparent, it means that it is a true polarized lens. Because the special design of the polarized lens only allows parallel light to pass through the lens, when the two lenses are stacked vertically, most of the light is will be blocked.