Points with polarization - what is it? Polarized glasses. How to check the polarization of glasses

Glasses with polarization, or, as they are still called, anti-glare glasses, are not only saved from bright light. They help the eye to more clearly recognize the picture, illuminated by the sun's rays, while correcting all the distortions that have arisen.

On the polarization

Reflecting from different surfaces, the rays can continue their way in a vertical or horizontal direction. In the first case, the human eye can distinguish objects surrounding it without obstacles. The horizontal rays partially overlap the image, forming a glare. To eliminate light distortion, glasses with polarization are used. What it is is easy to understand if you imagine a kind of filter that blocks horizontal rays.

Polarization surface is a material covered with a thin protective film. Getting to the surface layer, the ultraviolet rays are absorbed by it. As a result, a person sees only vertically directed light waves that do not interfere with the vision of objects. The absence of horizontal rays reduces brightness and increases the contrast of the image, thereby reducing the burden on the eye.

Who needs anti-glare glasses

The most common consumers of polarized lenses are motorists. Due to the risk of accidents, they simply need perfect visibility during their journeys. Polarized glasses for drivers eliminate such visual disturbances as glare from the windshield, dashboard, wet asphalt and even blinding headlights. When using lenses absorbing ultraviolet rays, a motorist can easily see all the objects on the road, even on the sunny day. In addition, experts have proved that polarizing glasses significantly increase the reaction of the driver.

The second group of contingent involved in the use of special protective lenses are fishermen. As a rule, bright sunlight leaves a strong glare on the surface of the water. Therefore, many avid fishing enthusiasts began to use sunglasses with polarization during fishing. What does this give them? Anti-glare glasses provide excellent visibility of the water surface even in the clearest noon.

Polarization plays an important role in the lives of athletes. Sunlight can interfere with surfing or skiing. This is completely unacceptable, because the lack of good visibility is unsafe for athletes and often causes injuries.

Advantages of polarizing glasses

Sunglasses with polarization have a number of positive properties. The undeniable advantages of anti-glare lenses are that they:

• Reduce the burden on the eye nerves.
• Protect eyes from the harmful effects of ultraviolet rays.
• Improve visibility by reducing brightness.
• Preserve natural color rendition.

Negative moments

In principle, there are no shortcomings in polarization lenses and can not be. They are easy to use and absolutely safe for eyesight. As a minus can be distinguished except that the following points:

• Quality anti-glare lenses are much more expensive than conventional glasses. The price of such products can force the buyer to put out "a pretty penny."
• On inexpensive glasses, a thin polarizing layer is usually applied. In the process of operation, it quickly deteriorates and begins to flake off.
• Sometimes driving glasses distort the image on the screen of the navigator.

How to choose polarized glasses

It is not possible to purchase universal polarized glasses, suitable for any conditions. Experts recommend that when choosing anti-glare lenses to repulse from their color. So, for example, motorists should give at least two options. For day driving, brown or copper glasses with polarization are suitable. That this gives special advantages, is proved by a lot of users: the contrast of the image is reduced, so that the eye muscles relax. In addition, lenses with a brown tinge absorb ultraviolet rays better than others. To find behind the wheel in the evening it is necessary to select a separate model. The ideal choice will be products with yellow lenses.

As for fishing, for this lesson you can buy one model of glasses. Excellent will cope with its task gray lenses. Especially they will suit those who are fond of fishing in deep water. And for fishing on a hot, clear midday, it's better to give preference to glasses with green lenses.

Polarization check

Not all manufacturers produce high-quality and genuine products, so it is very important to know how to check the polarization of glasses. To understand, whether the model chosen by you is equipped with anti-glare lenses, is very simple. To do this, you just need to bring the glasses to any liquid crystal monitor. If you rotate the polarization lens at an angle of 90 ° to the display, the image will darken sharply. For eyeglasses without anti-reflective coating, this experiment will not work - you can still see the monitor through the glass as clearly. Also, instead of a liquid crystal screen for authentication, you can use one more glasses with polarization. Normally, the effect should be the same - one of the lenses will darken.

Tips for those who wear ordinary glasses

In the presence of visual defects, it is more difficult to wear glasses with polarization. It's impossible to say that this is a huge problem, but nevertheless use of anti-glare lenses in such a case is a bit expensive. Just get polarized glasses will not work - they are not designed to correct vision. You can correct the situation in two ways: by wearing contact lenses or by using special anti-glare lenses. The first option is quite unprofitable financially, as it requires regular expenses. In addition, some people are simply uncomfortable constantly wearing lenses.

A much more advantageous option is to purchase anti-reflective lining. They can replace sunglasses with polarization. What kind of products are not known to everyone. Polarization overlay is a design of two anti-glare lenses, which is attached to ordinary glasses. This is very convenient - the product is easy to put on and remove, without causing discomfort to the user. It is better to give preference to models with fastening on the bridge of the nose, as they are most convenient to use. The ideal choice will be the lining, designed specifically for driving.

Sunscreen lenses are designed to protect the human eye from the dangerous effects of ultraviolet rays. However, only polarized glasses can cope with this task. What does this mean? Polarizing glasses are a miracle of technology compared to conventional sunscreen lenses. For simple mods, they are not so useful, but for fans of an active lifestyle - irreplaceable.