Sooner or later all supporters active image lives are gained polarized glasses. It's about about an optical device with lenses having a polarizing filter. Daylight propagates in the form of electromagnetic waves that oscillate in all directions of three-dimensional space. Polarizing light propagates in two-dimensional space in two directions: horizontal, which creates optical interference, and vertical, with the help of which the eyes can perceive various information, determine colors and contrasts.

Sooner or later, all supporters of an active lifestyle purchase polarized glasses.

This technology based on the principles of light wave movement. Due to the fact that light streams are emitted mainly in the horizontal direction, to eliminate the glare effect it is necessary to use special filters that allow vertically oriented waves to reach the eyes. A special lens filter is a thin liquid crystal film located between layers of glass or plastic.

IN recent years optical devices with a similar effect are becoming increasingly popular among professional photographers, who use them as a tool for changing color depth and contrast. One of the main advantages of polarized glass is its ability to remove up to 95% of polarizing light. Thanks to this, it is possible to create high-quality photographs.

How to choose polarized sunglasses for fishing (video)

How to check polarization

Since not every manufacturer can boast of producing high-quality and authentic products, it is important to know how to check polarized glasses for quality. To do this, you need to bring them to any LCD monitor or other optical device with polarized glass. If you rotate the lenses at a 90° angle to the display, the image will darken dramatically. If this does not happen, it means that you purchased not anti-glare glasses, but ordinary ones.

This is a standard test. A home experiment with light polarization can be done in a similar way.

One of the main advantages of polarized glass is its ability to remove up to 95% of polarizing light

Purpose of polarized glasses

People who wear such glasses try to protect their eyes from glare that occurs when the sun's rays are reflected from various surfaces. Glare can cause blurred vision, impaired perception, and even blindness. Polarized sunglasses help block reflected light, which is why they are popular. This has a positive effect on the quality of vision, increases image contrast and improves the functioning of visual receptors.

There are two types of glasses with polarized lenses:

1. Daytime. Thanks to the presence of a UV filter, they not only fight glare, but also protect the eyes from sunlight.
2. Nighttime. Struggling with the blinding headlights of oncoming cars.

Speaking about glasses with polarized glass, it is worth noting their advantages and few disadvantages.

The advantages include:

• reducing eye strain;
• protection of vision from negative influence UV rays;
• improving visibility by reducing brightness;
• adding color saturation;
• maintaining natural color reproduction.

Disadvantages include:

• distortion of the image on the navigator screen;
• high cost.

How to distinguish polarized sunglasses from regular ones (video)

Who needs anti-glare glasses

First of all, motorists need such glasses. Due to the risk of accidents, visibility during travel must be ideal, especially in poor weather conditions. Glasses eliminate visual disturbances such as glare from the windshield, dashboard, wet asphalt and glare from headlights. Using polarized lenses to reduce glare and glare ultraviolet rays, the driver will have an excellent view of all objects on the road even on a sunny day.

Experts have proven that thanks to polarized lenses, motorists begin to react much better to everything that happens.

The second group of people who often protect their eyes using polarized technology are fishermen. Due to bright sunlight, strong glare remains on the surface of the water, so many anglers use a similar optical instrument while fishing.

Due to the bright sunlight, strong glare remains on the surface of the water, so many anglers use a similar optical device when fishing

Polarization plays important role and in the lives of athletes. The sun often gets in the way when surfing or skiing, which is completely unacceptable. When there is no good visibility, a person can be seriously injured, so sun protection spectacle lenses with polarization are not a privilege, but a necessity for this category of people.

The manufacturer is responsible for the quality and service life of a useful accessory. Manufacturers who treat their customers with respect always sell their goods through chains of pharmacies and opticians. You should not purchase cheap products from suspicious stores; it is better to immediately contact specialists.

IN modern world Sometimes it is impossible to live without a car, especially for business people. But bright sun rays, blinding drivers, can become a real obstacle for drivers. At the same time, you shouldn’t have high hopes that the visor will help you. Moreover, this action makes the ride more limited. How to check polarized glasses? About this we'll talk further.

What are glasses for?

The main feature of glasses is the presence of lenses. If we discuss the practical part, then useful action such decisions are aimed at fighting off the glare. Special surfaces are often called anti-reflective.

Reducing the effect of glare on the eye increases visibility and improves the clarity of the visual image.

Polarized glasses for drivers provide protection from:

1. Surface reflections on glass.
2. Glare from the wet road.
3. Plays of light on white snow.
4. Reflections of light from any bright surfaces.
5. Headlight glare.

Human eyes have reliable protection from the sun, given by nature itself. This is nothing more than ordinary squinting of the eyes. But keeping your eyes closed for a long time leads to instant fatigue, and the protective effect does not always keep up with irritating factors in a timely manner.

Polarized sunglasses differ from others in that they provide a protective effect. Conventional accessories are equipped with simple filters that darken the picture, minimizing negative impact from ultraviolet radiation. However, the color component is significantly narrowed. In other words, wearing simple tinted glasses while driving is unsafe.

Polarized sunglasses unload organs of vision, however, one should not assume that these are fantastic devices. So, if exposed to direct rays of the sun and the absence of reflective coatings, they will not be effective.

Driving a car on night roads

Driving at night has its significant advantage, which is that during this period the road is almost completely clear, the driver can not strain and simply enjoy the driving process. But there are also a lot of shortcomings here.

Headlights of passing cars that blind, darkness - all this creates some difficulties on the road. Some ignorant drivers do not bother to switch the high beam to the low beam.

Naturally, every person loves himself and wants to look like a real king behind the wheel of his car. But the aesthetic component should not interfere with safe movement. It would be much more advisable to prevent certain factors. When a tense situation occurs on the road, the airbag is automatically deployed. She hits the man sitting behind the wheel. In this case, the injury can be significant, and car polarized glasses can lead to blindness.

Quite often the lenses of such accessories break. Therefore it is urgent It is recommended that these components be made of plastic and not glass. It is pointless to talk about what can happen in the event of a powerful blow when glass breaks, so it is clear that the fragments will get into the organs of vision. It would be a good idea to purchase polarized sunglasses interchangeable lenses. The frame of the accessory should not interfere with the view, and the person will not have to constantly turn his head to the sides.

When driving at high speed central vision is decreasing because great importance relegated to the periphery. If the glasses are equipped with wide frames, then to view the mirror you need to turn your head very much, which means unnecessary distraction from the situation on the road.

The ideal driver's glasses should have lenses with polarizing filters that help reduce glare.

Criteria for correct selection

To choose really high-quality polarized glasses with diopters, you need to pay attention to the following characteristics:

1. The glasses model should be as practical as possible so as not to cause trouble when driving a vehicle.
2. The frame should be thin, and the ear parts should be placed as high as possible. Such a product will not interfere with peripheral vision, which is very important for drivers.
3. An important and one of the main criteria is the presence of a polarizing filter.
4. A UV filter has a negative effect on vision, so its presence is also very important.

Surprisingly, not all filters that are offered are polarizing. Yellow or brownish color does not mean anything. Today the market is literally teeming with a mass of fakes that do not have the desired effect.

Polarized prescription glasses for drivers should not be confused with simple yellowish lenses. To some extent, such accessories protect the driver’s eyes when exposed to headlights, but do not combat glare.

Features of checking glasses

When you purchase an item, you need to check the product without leaving the cash register. Pictures to check polarized glasses available in any store that sells the accessories themselves. This is where sellers will help you find out the authenticity and quality of your purchase.

Features of verification upon purchase:

1. You will be offered pictures of polarized glasses that will help you determine the quality of the filter. Look at the indicator through the lenses, and a picture will appear in front of you that cannot be seen without glasses.
2. Take another pair of glasses, place them opposite each other, and rotate the lenses so that the central parts are touching. When it suddenly becomes dark in the places of coincidence, you can’t even doubt the quality of the product.

Do you have similar sun protection accessories designed for driving, but did not check them when purchasing? It's okay, you can find out the true quality of an item without leaving home.

How to test polarized glasses at home :

1. Turn on the monitor of your TV or any other device. Point your glasses and rotate them 90 degrees. The monitor image will not be visible through genuine lenses.
2. If you have an aquarium in your home, look at the bottom of it while wearing your glasses. Even if the water is cloudy, good lenses able to see everything that lies there.

The above methods are quite enough to figure out what accessories you have in front of you.

Main functions

Women's and men's polarized sunglasses guarantee high level picture clarity. Such glasses are also required to enhance visual perception. In addition, they improve the depth of spatial vision.

Anti-headlights expand the view of the road when the driver is driving the car. Thanks to this, the person driving the car will not feel discomfort from driving in bad weather.

Yellow glasses can be used when it is cloudy and the sun is shining brightly. With their help, the clarity of the picture increases, colors and contrast differ. These products have one significant drawback. While driving, the driver will constantly turn his head. This leads to eye fatigue.

What glasses to choose so that your eyes don't get tired

If you do not want to strain your eyes too much, then you should opt for green, gray or brownish lenses. There is no need to use accessories regularly, because they can also change the perception of shades. Use them in dark time days, or when it rains.

Consider factors such as protection, comfort and safety when choosing glasses. Don't forget about your style too, because they should match you.

Now you know about the concept of polarized glasses and what it means. Have no doubt that they will significantly simplify your trips, improve your visual reactions on the road, the depth of spatial vision, and increase sharpness. Ideally, it is recommended to buy several pairs of glasses to use in different situations. different times days.

Polarization is the absorption of light reflected from horizontal surfaces by a thin film fixed in various ways in the lenses of glasses.

Electromagnetic waves from sunlight travel in three-dimensional space in all directions. When colliding with reflective surfaces (water, asphalt, snow), the rays continue to move in the vertical and horizontal planes. Vertical beams allow you to distinguish colors, contrasts and do not create inconvenience. Horizontal rays irritate the eyes, creating light noise, interference, and glare.

The ability of lenses to cut off glare while transmitting only vertical waves is called polarization.

Sunglasses With polarization, only vertical light passes through, blocking glare and reflected light. When using conventional non-polarizing lenses, the intensity of the penetrating light is reduced, but glare is not blocked and continues to affect the human eye.

Advantages and disadvantages of polarization

Benefits of polarized sunglasses:

1. Protection from ultraviolet radiation;
2. Reducing eye fatigue;
3. Preservation of natural color perception;
4. Visual clarity due to improved contrast.

Flaws:

1. Inexpensive glasses use a thin polarizing film applied to one side of the lens. Such film often peels off, wears off, and gets scratched, reducing the service life of the product.
2. May distort or darken the radio or navigation display in your vehicle.
3. The laminated or treated texture of a car's windshield can become more noticeable, making you more distracted from the road.

When choosing polarized glasses, you should pay attention to the quality of polarized lenses and the reliability of the manufacturer.

Ray Ban Polarized Sunglasses

There are two simple ways to check glasses for polarization:

Match two polarized glasses lens to lens. Position one pair of glasses at a 90° angle so that the axis of rotation is at the center of the lens. If the glasses are polarized, the light will become dark; in the case of simple glasses, nothing will happen.

Rotate the glasses 90° relative to any LCD monitor. If there is a polarizing filter, the image will darken, regular lenses will not give such an effect.

For polarized sunglasses Ray Ban models with polarizing filters are marked with special icons on the left lens - Ray Ban P. In addition, lenses with three additional coatings have recently appeared on sale: anti-reflective, dirt-repellent and oleophobic, which increases the service life of glasses. The marking of such lenses is P3. Polarized lenses marked P3+, in addition to the listed coatings, contain a special component that makes surrounding objects brighter.

They have a number of advantages that distinguish them from accessories of other brands:

• the lenses almost completely block the harmful spectrum of ultraviolet waves of various lengths (up to 400 nm);
• reducing the degree of exposure to blue light on the retina;
• scratch protection;
• wear resistance and strength;
• long service life.

Glasses with polarized lenses are especially important for anglers; athletes involved in winter sports; drivers.

A person perceives most of the incoming information through vision, and the eyes are able to work normally in a wide range of lighting conditions. However, when there is excess light, the eyes need to be protected. To do this, use sunglasses, which reduce the flow of light entering the retina and filter out UV waves. Yes, these glasses cope with this task quite successfully.

However, often it is not the bright light itself that bothers the eyes, but its reflection on the water surface, snow, and wet asphalt. Under these conditions, ordinary glasses, even with anti-reflective coating, will not give the expected effect - glasses with special polarized lenses are needed.

What is polarization

When developing polarization technology, the features of the movement of light waves were used.

It turned out that glare, which is light reflected from flat surfaces, unlike ordinary rays of the sun, has horizontal polarization, that is, oscillations of the light wave occur predominantly in the horizontal plane. Therefore, if you use special filters that cut off horizontally oriented waves and transmit only vertically oriented ones, then the glare effect can be removed.

This is how a polarizing filter works

The main element of polarized glasses - the polarizing filter - is a thin liquid crystal film located between layers of plastic or glass. Its molecules are oriented in a certain way, and parallel vertical slits are formed between the columns of molecules - optical axes, and light passes only through them.

Professional photographers have been using the features of polarizing filters for a long time, using them to vary the color depth and contrast. Thus, a high-quality polarizing photo filter cuts off up to 95% of polarized light.

“From what, from what, from what...”

The cost and quality of glasses depend on the materials from which they are made, and products from well-known manufacturers (Polaroid, Salmo, Ray Ban) will be more expensive than unknown Chinese products. When buying cheap models, you should be careful: due to poor-quality polarization, the optical axes in their filters may be shifted relative to their working position, and there will be little benefit from such glasses.

Today, the following are used to produce polarized glasses:

• plastic unknown to science;
• certified plastic (for example, ANSI Z87.1 certified);
• polycarbonate;
• mineral glass;
• special polymer CR-39;
• other materials patented by manufacturers (ORMA, Trivex, etc.).

All these materials have their own disadvantages and advantages.

Material	Advantages	Flaws
	Light weight Shock resistance Low price	Scratch quickly, only need to be stored in a protective case
Polycarbonate	Light weight Effective polarization Higher abrasion resistance	Plastic scratches less, but more than mineral glass
Mineral glass	Abrasion resistance Durability	High weight Fragility When polarizing, you need to add UV absorbers to the filter
	Does not transmit UV rays Abrasion resistance high temperatures, chemicals Low weight (twice lighter than glass)	High price Requires application of a hardening coating

As you can see, models made from modern polymers have less weight and increased impact resistance and, as a result, can be better than glass ones - and more expensive. If you choose cheaper glasses, they will last no more than one season, or even less. Although, perhaps, in some cases this is exactly what you need: for example, if you are going skiing for the first time in several years and do not plan to repeat this adventure in the coming years.

Checking whether you have polarized glasses or not is quite simple: take two pairs of glasses and place their glasses on top of each other at an angle of 90 degrees: the lens should become completely opaque. You can also look through the lens, rotating the glasses around its axis, at the screen of a phone, calculator, monitor - any LCD display. When rotated 90 degrees, you should not see anything on this display.

Layers of Polaroid polarized glasses

The latest models of polarized glasses are chameleon glasses that darken or lighten depending on lighting conditions, ultraviolet content in sunlight and ambient temperature.

Polarized glasses with diopters are quite rare. This is due to the fact that ideally each pair of corrective glasses should be made individually, after which a polarizing filter is applied to the diopter lens, and then the lens is darkened. Of course the cost quality product will be quite high. Therefore, those whose vision fails can wear glasses with a polarizer along with the lenses or use polarized pads on corrective glasses: such pads are attached to the frame and, if necessary, lowered onto the glasses. Before lowering the pads, you need to thoroughly wipe both them and the lenses of the glasses, otherwise, in side light, every speck of dust between the glasses and the pads will be visible.

Lens color

Although polarized glasses do not allow all of the sunlight to pass through, their lenses are often additionally darkened and/or tinted. At the same time, the lenses different colors have their own characteristics:

• copper and amber colored lenses soothe and relax the eyes, while they cut off the blue part of the spectrum and make the image clearer;
• pink lenses help the eyes adapt to rapid changes in the “picture” - for example, when fishing from a moving boat;
• blue lenses - used for sea fishing;
• yellow lenses improve contrast and filter out the blue part of the spectrum; they are used in low light conditions - in the morning, evening, twilight, cloudy or rainy days;
• iridescent lenses (gray on top and pink on the bottom) reduce brightness and at the same time improve contrast; this feature is convenient, for example, when working at a computer in bright sunlight;
• gray or brown lenses are universal, they are best suited for constant use because they preserve natural color rendition, simply reducing the total amount visible color. At the same time, gray lenses are comfortable in bright sunlight, and brown lenses are comfortable in partly cloudy conditions, as they increase contrast.

Looking at the world through glasses without a polarizing filter and with it

Each manufacturer of polarized glasses produces its own line of lenses: KBco, along with the traditional gray and brown, produces glasses with lenses in apple green and sky blue; Specialty Lens Corporation - eleven color options; Vision-Ease Lens" SunRx - three colors.

“And the eye is like an eagle’s”

Polarized glasses have long gained popularity, especially among fishermen, athletes and drivers. And if anti-headlight glasses are better suited for driving at night, the lenses of which are coated with a highly reflective coating that protects the driver’s eyes from being blinded by oncoming or reflected headlights, then during the day polarizing filters do not just increase comfort.

The glare of reflected light distracts, irritates and blinds the driver. According to tests, the use of polarizers reduces reaction time to danger. Thus, at a speed of 50 km/h, the stopping distance of a car increases by 35% if the driver does not wear sunglasses at all, and by 57% if he wears regular sunglasses.

Some requirements for polarized driving glasses:

• such glasses should fit comfortably so as not to distract from driving;
• in order not to limit the field of view, the temples should be no wider than 6 mm and should not be attached to the center of the frame, but from below or above;
• Gradient dimming allows you to see better dashboard through a lighter one bottom part lenses.

Polarizers enhance the visibility of the red part of the spectrum and will inevitably make you notice prohibiting traffic lights, the feet of a car in front, or the slightest movement of a float.

Fishermen note that polarizing filters reduce eye strain, extinguish sun glare and allow you to view the water column to great depths (of course, this trick only works in relatively clear water and within a radius of 15-20 meters). Fishing glasses often have side pads for better protection from bright sunlight.

Polarized glasses are also needed for those who engage in skiing and other sports. outdoors. Sports glasses with polarizers often have pads made of elastic material(silicone, rubber, nylon, etc.), which help the glasses maintain their shape in the cold and increase their impact resistance, as well as removable or solid side pads that protect the eyes from snow. Ski goggle lenses are larger than normal to increase the angle peripheral vision, they are made of polycarbonate - this allows you to reduce the weight of the glasses and at the same time increase their impact resistance.

It is better to choose the color of the lenses in sports glasses depending on what kind of sport their owner is engaged in: for playing golf, in order to notice the ball against the background of grass and sky, copper-colored lenses are recommended, for shooting - contrast-enhancing yellow ones, for tennis - blue or green, for cycling - glasses with a mirror coating.

The color of the lenses in glasses for winter sports should be brown, amber or copper-colored - in such glasses the relief will be clearer, because they filter out blue tones, due to which a romantic haze is created around objects, making the outlines blurry.

Polarized glasses are also used when hunting - here they not only improve the picture, but also protect the eyes from dust and debris, which abound in the forest. In addition, for the safety of the hunter, such glasses must meet a number of requirements:

• the frame should be round in shape to protect the face from accidental damage;
• protection against sweat should be provided on the bridge of the nose;
• the temples must be fastened with special spring loops so that the frame is more flexible and, accordingly, reliable;
• the frame itself must be impact-resistant - made of titanium or polycarbonate;
• elastic nose pads are required;
• The color of the lenses can be light purple, bright red, amber, copper - in such glasses a light target can be clearly seen against the background of dark trunks. Gray lenses, which are effective in bright sunlight, are not suitable for forest hunting.

The first glasses with a polarizing effect were released in 1937 by the Polaroid company. It was a rather expensive and fragile invention; its glass, due to imperfect technology, quickly became cloudy and delaminated, so the new product aroused not only interest, but also a lot of criticism. Since then, progress has come a long way, and today these glasses have become both cheaper and better quality. I think this article will help you maintain a clear outlook in any conditions.

We all know very well that you cannot save on your health. And, of course, we do this more and more often various reasons. But, no matter how compelling the reason for cutting costs, you cannot endanger your eyesight. The eyes are one of the most sensitive and vulnerable organs, which can easily be damaged, but restoration is not always possible, regardless of the cost of treatment. That's why sunglasses with polarizing filters lately It’s well known: both ophthalmologists and quickly oriented manufacturing companies contribute to their popularization. Among them, of course, there are enterprises with a proven reputation over the years, producing truly high-quality and expensive optics, and many factories offering affordable goods of dubious quality.

However, the risk of running into a fake at a fairly high price cannot be ruled out. In order to protect yourself from wasting money and your eyes from aggressive ultraviolet radiation, you need to be able to check polarized glasses. It's best to do this before purchasing. But it wouldn’t be superfluous to check the glasses you’re wearing now.

What is polarization? Properties of polarized glasses
To understand the basic principle on which the protection of polarized eyeglass filters is based, you need to understand the nature of polarization itself. And this, in essence, is the separation of any objects, processes or waves, including waves of light, the visible part of which is perceived by human eyes. Sunlight itself is not divided into parts, but the diffuse illumination of the sky, any reflected rays already consist of waves in two directions, perpendicular to each other. In practice, this manifests itself in the fact that while waves of one vector “illuminate” the surrounding space for us, waves of the second direction create all kinds of interference for it. visual perception: glare, sunbeams, overexposure, etc. To prevent this effect and take advantage of its capabilities, polarizing filters were created. Gradually, from the arsenal of cameramen, photographers, ophthalmologists and other specialists dealing with professional optics, they migrated to the set necessary tools fishermen, hunters and athletes, and over time they have become a convenient and useful addition to eyeglass lenses for a wide range of consumers.

To subordinate the physical phenomenon of light polarization, two transparent plates were compared, between which a material with a fine-crystalline structure was sandwiched - this is the design of polarizing filters today, only the thickness and composition of the materials vary. More recently, technology made it possible to place such a “layer cake” only on heavy glass lenses glasses, today polarized glasses are made from lightweight plastic. In addition to weight, modern materials for the manufacture of glasses differ from outdated glass in much higher strength (do not break when dropped) and resistance to other mechanical influences (scratches). When choosing polarized glasses, keep in mind that it is very difficult to find polarized glasses for vision correction on the open market. Main reason for this - the complexity of the technology, due to which such glasses would be prohibitively expensive, and their mass production– unprofitable. Therefore, it is better to refuse such a purchase: most likely, you are looking at glasses with diopter correction, but not with a polarizing filter, but with a so-called “anti-reflective coating.” It represents the enlightenment of part of the glass and reduces the amount of distortion in its thickness, but has nothing in common with real polarizing filters.

Who really needs polarized glasses and why? First of all, for those whose activities involve constant attention and tracking of distant objects in conditions of difficult refreshment and/or poor visibility. That is, drivers in cloudy weather, when visibility is minimal, fishermen in sunny days when the sun's rays glare on the surface of the water and fish scales, for climbers and skiers, when the blinding sun is intensified by snow, etc. Sunglasses do not solve such specific problems, but only protect the retina from ultraviolet radiation and generally reduce the brightness of the picture. In contrast, polarizing filters make images more contrasting and detailed, as if expanding and lengthening the visibility area. At the same time, do not forget that a polarizing filter itself does not provide protection against ultraviolet radiation. Depending on the purpose and additional functions, polarized glasses can be of any shape and configuration, their main value lies in the filter. It can be applied to the surface of the glasses in the form of a thin film (such glasses are relatively inexpensive) or be directly “built” into the glass (more expensive and durable glasses models). But in any case, high-quality polarized glasses cannot be cheap. This is the first sign with which you can check the authenticity of polarized glasses. And only after this first check proceed directly to testing polarized glasses.

Checking the polarization of sunglasses
The essence of the polarizing filter test becomes clear to anyone who is familiar with the operating principle of liquid crystal monitors. It consists in the fact that two polarizing filters interact with each other, mutually limiting the passage of light. If you know about this, then it will not be difficult for you to catch manufacturers and sellers of pseudo-polarized glasses as counterfeits or, conversely, to verify the authenticity of the product. To do this, carry out the first test right in the optical store:

• Test No. 1. Take two glasses from the display case and place them with the glasses opposite each other, holding both horizontally. If the glass is clean and free of scratches, visibility through two layers of lenses will be excellent. Now select any pair of lenses on different glasses and begin to rotate one glasses relative to the others through an imaginary axis passing through the centers of the lenses. Rotate the glasses so that the angle of rotation is first 45°, and then a right angle. In this case, polarized glasses will first darken the image, and then you will not be able to see anything through them. If there is no polarizing filter in your glasses, then the image will still be excellent, no matter how you rotate the glasses in space.
  
• Test No. 2. If there are no other glasses at hand, spend even more simple check. For it you will need only one glasses to test and any LCD monitor (TV or computer screens, tablet, smartphone, etc.). Look at the LCD screen through glasses placed horizontally in front of the center of the screen. At this stage, glasses should not interfere with the perception of information on the monitor. Now rotate the glasses along the axis vertically: if they have a polarizing filter, then the area of ​​​​the monitor that you see through the glasses will look uniformly dark.
  

These two available ways checking polarized glasses is absolutely enough to determine the presence of filters. At the same time, the color of the glass is not at all an indicator of polarization or its absence and only affects the specific perception of the image, for example:

1. Blue glasses are used for sea fishing, allowing you to distinguish details on a large shiny surface.
   
2. Yellow and red glasses increase the contrast of the image, which is why they are convenient on cloudy days and at dusk.
   
3. Pink glasses are used when you need to consider a lot of details, for example, for fishermen in thickets of reeds and water lilies.
   
4. Gray glass is a universal shade for sunny days.
   

The most difficult situation with choosing and checking polarized glasses is for those who everyday life wears glasses to correct vision. For such people there are not many options: you can wear contact lenses and, if necessary, wear polarized glasses or purchase a complex design of two combined frames, which is expensive and not very convenient to use. True, recently information has appeared about polarizing pads that are supposedly capable of making any glasses polarized. Such clip-on polarizing filters are quite capable of replacing full-fledged polarized glasses, but before purchasing, be sure to check them in one and/or the second way described above.

Plus, you use polarizing filters on your glasses more often than you might think: for example, when watching 3D movies in 3D theaters, IMAX, or even a home theater system. Glasses with multi-colored lenses are made using the same principle of light separation and divide the image between the two eyes to create a stereo effect. And some living creatures have the ability to have polarized vision by nature - in particular, this allows winged insects to better navigate in space. In humans, this property is extremely rare, can be episodic in nature and is considered a sign gene mutation. But one of the discoverers of the polarization of light, Etienne Malus, advanced in his research when he admired the Luxembourg Palace, illuminated by the rays of the setting Parisian sun. We sincerely wish you to observe no less charming pictures through the lenses of your reliable and high-quality polarized glasses.