How to tell whether glasses are polarized or not. Do I need to wear dark glasses and what is the difference between regular lenses and polarized and photochromic ones? Russian brand "Aqua"

Often people need special glasses that could protect their eyes from blinding sun glare, which is light reflected from different surfaces: from water, snow lying on the ground, roofs of houses, etc. Glare greatly impairs vision and at the same time makes it difficult to see certain details. This is very dangerous, especially for motorists. To solve this problem, you need to buy polarized glasses, and before choosing such a sun accessory, it is recommended to check them.

What are polarized glasses

Polarized sunglasses with anti-reflective coating are products whose lenses block the sun's rays reflected from horizontal surfaces. To answer the question of what is polarization in glasses, remember this: the nature of light is that it can be scattered in both vertical and horizontal directions. Horizontal polarization creates glare and optical noise, while vertical polarization helps to recognize colors and contrast.

What are they for?

Polarized sunglasses are necessary in order not to endanger your vision, because the eyes are one of the most sensitive organs, which, if damaged, are very difficult to heal. This type of optical device is especially needed for driving a car. In addition, some manufacturers offer a whole line of inexpensive glasses to choose from, which differ in frame material and lens color. Glasses with special coating provide:

• protection from bright sunlight, ultraviolet rays;
• clearer image without glare;
• correct color rendering;
• improved image contrast.

How are they different from sunscreens?

Unlike ordinary sunglasses, the lenses of such models are a structure consisting of many layers. Inside it there is a transparent polarizing thin film. It acts as a special filter that transmits only light that is vertically polarized. If you wear regular glasses, keep in mind that glare interferes with the clarity of your visual perception. Even optical devices with antireflective coatings applied to them cannot protect against glare on the surface of snow in winter, road surfaces, and water.

How to check your glasses for polarization

Thanks to their special optical properties, polarized lenses help improve the quality of vision and increase visual comfort in general. Unlike regular glass lenses, they have a polarized filter. This raises the question, how to distinguish anti-glare glasses with a polarizing effect from conventional sunglasses? To do this, you need to perform a kind of test using the following tips:

• Take two pairs of protective film glasses that are supposed to block glare and place them lens to lens. Rotate one model relative to the other by 90 degrees, look at the light. With anti-glare glasses it should become dark.
• The second method can be used at home. To do this, put on an optical device and look at the LCD monitor of your TV or mobile device from an angle of 90 degrees. The image should become dark.

Polarized glasses

Today you can even order glasses with polarized lenses in an online store with delivery by mail. This method of purchasing has become increasingly popular recently. Before you buy a car optic or a fishing model, check out a few common models. Compare their characteristics, cost, and then choose the best option. In high-quality glasses with protective film, your vision will be reliably protected.

Driver glasses

Sunglasses for drivers with polarization need to be selected not only taking into account the shape of the frame, but also the color of the lenses. Driving glasses with green, brown and gray lenses will cause the least amount of eye fatigue. True, the first ones are not recommended, because... they change the perception of colors. Optical devices with yellow lenses are useful when driving in poor visibility conditions: rain, snow, fog. Photochromic lenses will always have the same dark glass in both twilight and sunlight. A good purchase would be:

• name: Smart View;
• price: 397 rubles;
• characteristics: body material plastic, frame color black, lenses amber, UV protection;
• pros: do not distort colors, do not interfere with the view, is cheap;
• cons: none.

To choose the appropriate option, check out the second option, which is in no way inferior to the first in terms of rating and popularity:

• name: Sun Drive;
• price: 1350 rub.;
• characteristics: material metal, plastic, yellow lenses, packaged weight 65 g;
• pros: suitable for driving in poor visibility conditions;

Check out the characteristics of polarizing optical devices with brown lenses and a high-efficiency UV filter:

• name: Legna;
• price: 1700 rub.;
• characteristics: plastic lenses, Cat.3 blackout, built-in UV filter;
• pros: stylish look, durable frame, high-quality plastic;
• disadvantages: cannot be used when driving a car at dusk and at night, it is expensive;

Fishing glasses

You can find many models for fishing on sale in Moscow, St. Petersburg and other cities of the country. There are even special overlays that are installed on top of regular ones. The choice of polarized optical devices for fishing is dictated mainly by color. So, for fishing in inland waters, gray lenses are mostly chosen, while at sea - green, but brown ones are considered universal. A good purchase might be:

• name: MIKADO;
• price: 1056 rub.;
• characteristics: color of frame and lenses is gray, material is plastic.
• pros: comfortable, durable;
• cons: none.

Another equally attractive option that can suit any angler is:

• name: Salmo;
• price: 1305 rub.;
• characteristics: frame and lens material is plastic, there is a cover/case.
• pros: durable, suitable for sports:
• cons: higher cost compared to analogues.

Another equally attractive purchase, which has gained considerable popularity due to its characteristics:

• name: Sufix RVG-SUFIX832;
• price: 1400 rub.;
• characteristics: frame color black and red, material plastic;
• pluses: attractive appearance, reliable connecting elements;
• cons: higher cost compared to analogues.

Cafa France

The products of Cafa France, which are distinguished by safety and comfort for drivers, have gained great popularity. With the help of her glasses, you can protect yourself from bright sunlight, exposure to glare, which leads to visual fatigue in the form of a quick glance, frequent blinking, pain in the eyes and watery eyes. If you have not yet chosen the best option, then take a closer look:

• name: Cafa France С13451Y;
• price: 1650 rub.;
• characteristics: unisex, frame and lens color yellow;
• advantages: significant reduction in the effect of glare from the headlights of oncoming cars;
• cons: high cost.

A driver's model with dark lenses will be an equally attractive and high-quality purchase:

• name: Cafa France С13198;
• price: 1650 rub.;
• characteristics: for men, frame and lens color brown, lens material plastic;
• pluses: optimal degree of darkening;
• cons: high cost.

Another option with dark lenses and excellent protection against glare and reflected color is the product:

• name: Cafa France С13396;
• price: 1650 rub.;
• characteristics: for men, lens color brown, frame material plastic;
• pros: reduced eye fatigue, reliable fastening points;
• cons: high cost.

Shimano

Among fishing enthusiasts, optical devices from the Shimano brand are in great demand. They provide the required polarization and transmit the required amount of light. Before you make a purchase, check out as many offers as possible. The fact is that some stores often hold sales and promotions - this is an excellent opportunity to make a purchase at a discount. One of the Shimano options:

• name: Shimano Technium;
• price: 2200 rub.;
• characteristics: the frame is covered with carbon fiber, the lenses are gray, the tops of the arms are non-slip;
• pros: good quality, lightness;
• cons: high cost.

Another equally high-quality and stylish option for fishing enthusiasts with high ultraviolet protection:

• name: Shimano Catana BX;
• price: 2400 rub.;
• characteristics: the color of the frame and lenses is gray, parts are made of non-toxic and non-allergenic compounds;
• pros: high quality, lightweight;
• cons: high cost.

Stylish and durable model with anti-allergic temples, perfect for fishing in any conditions:

• name: Shimano YASEI;
• price: 2700 rub.;
• characteristics: frame color is bright silver-white, lenses are gray polycarbonate;
• pros: excellent design, quality;
• cons: high cost.

How to choose polarized glasses

When choosing, you should not focus mainly on cost, because it does not mean that the higher the price, the higher the quality - this rule does not always apply. The glasses should fit snugly, but without excessive pressure. Check the authenticity using the tips above, as well as the cleanliness and clarity of the lenses. Plastic lenses are lightweight and inexpensive, but they scratch easily.

When it comes to color, gray lenses are among the most versatile and are suitable for long-term wear. Brown counterparts are no less popular; they are great for any lighting. For cloudy weather, you can choose yellow glasses, which are suitable for both fishermen and motorists. Don't forget that colored glasses distort real colors.

Video

Polarized glasses are glasses whose lenses have a polarized filter. So far, everything seems to be clear, or vice versa, nothing is clear, but let’s understand what polarized glasses are and why a polarizing filter is needed.

Let me make a reservation right away: all the tests for polarization of sunglasses that are described in this article were tested on this model of glasses. This model of polaroid glasses is inexpensive and very popular, so it was chosen for the test.

How to determine whether there is a polarizing filter in the lenses of your sunglasses or not? First, you need to understand what polarization is, and why this very polarizing filter protects your eyes.

Please do not confuse the polarizing filter in sunglasses (the use of this filter in sunglasses is not necessary) and the filter that protects the eyes from ultraviolet radiation (must be present in all sunglasses, otherwise why are they needed).

Some scientific facts about polarization

Daylight propagates in the form of electromagnetic waves oscillating in all directions of three-dimensional space.
Polarized light extends already in two-dimensional space, in horizontal and vertical directions.

In simple terms: light propagating in a vertical direction allows the eyes to perceive important information, recognize colors and contrasts. Horizontally spreading light creates optical interference (glare). For those who want to study in more detail the process of polarization of electromagnetic waves, it makes sense

Already in 1929 it was clear how to control light to reduce glare. The founder of the Polaroid Corporation was the first in the world to invent polarizing lenses for sunglasses. Today, almost all Polaroid brand sunglasses come with a polarizing lens filter.

For whom is polarization important in sunglasses?

Polarized lenses in sunglasses are loved by many; their very strong effect is noticeable for those who spend a lot of time on the water. Glasses with a polarizing filter are very popular among people who are keen on fishing; read about this in detail in the post “How to choose polarized glasses for fishing”. It is the waves on the water that create a huge amount of blinding glare, which polarizing lenses in sunglasses cope perfectly with.

Also, everyone who drives a car can remember the blinding effect of wet asphalt in sunny weather, etc. So, many motorists use polarized sunglasses to drive a car and they really like these glasses.

Where to buy polarized glasses

To avoid buying fake polarized glasses (of which there are many on the Internet), try to buy sunglasses in trusted online stores.

Where to buy original polarized glasses:
In RuNet, the leader in sales of original sunglasses is Lamoda. This online store has a large selection of original polarized glasses (lamoda does not sell fakes).

Where to buy fake polarized glasses:
If you purposefully want to buy a fake, then the undisputed leader in this matter is the AliExpress website.

The AliExpress website has a huge selection of fake sunglasses; you can choose from more than 30,000 models. For example, fake sunglasses from the famous Ray Ban brand on AliExpress can cost 300 rubles and free delivery to the post office.

Before purchasing Ray Ban sunglasses, be sure to read the following articles:

Advantages and disadvantages of polarized glasses

The price of high-quality polarized glasses can be quite high, and there is no point in buying cheap fakes. Let's figure out whether it's worth paying a high price for glasses with a similar filter, or whether it's better to buy regular sunglasses with a UV filter.

It is worth noting that along with the advantages, polarized glasses also have a number of disadvantages that can negate all their usefulness. Some people who use polarized glasses complain of constant headaches. Is this related to wearing polarized glasses or not? Without a medical examination and examination of such glasses, it is impossible to understand the causes of headaches.

Read on for all the other benefits of polarized glasses.

Benefits of polarized glasses

• Polarized glasses perfectly remove glare and reduce light intensity;
• when using glasses with polarization, the contrast of what you see increases;
• polarized glasses reduce eye fatigue;
• polarized glasses are simply irreplaceable for certain types of activities (driving, fishing, skiing, etc.);
• Glasses with a polarizing filter are recommended for people with light hypersensitivity.

Disadvantages of polarized glasses

• the price of polarized glasses is significantly higher than regular sunglasses;
• polarized glasses reduce the readability of road signs (weaken the reflected light), side lights and brake lights;
• Polarized glasses make it difficult to view information (darken the image) on a liquid crystal display (mobile phone with an LCD display, GPS navigator, tablet, etc.).

Two easy ways to determine if your sunglasses have a polarizing filter

It should be remembered that a polarizing filter is a thin film that is contained in the lens of your glasses, depending on the quality of the lenses in your glasses, the service life of the filter also depends.

For example, the polarizing layer (polarizing film, polarizing filter) in the original glass lenses of Ray Ban glasses is sealed between two outer lenses (), such a filter lasts throughout the life of the glasses. Oakley's patented polycarbonate lenses feature a polarizing filter at the molecular level of the polycarbonate (essentially the entire lens is a thick polarizing film). Inexpensive Polaroid glasses also have their own technology for producing polarized lenses; about Polaroid lenses, read the link.

In fakes of famous brands and cheap glasses, a filter is used in the form of a thin film on the surface of the lens, which wears off over time and the polarizing effect disappears. Try to buy glasses in trusted online stores that sell original products.

When purchasing sunglasses, it is very easy to determine whether there is a polarizing filter in the lenses! There are two simple ways to do this.

First test of the polarizing filter.

Before purchasing, ask the seller for another pair of polarized glasses and match them lens to lens. Next, turn some glasses 90 degrees relative to the others and look at the light (the axis of rotation should pass through the centers of the lenses). If the glasses are polarized, then the clearance in the lenses will become dark, but if the glasses are simple, then nothing will change.

Second test of the polarizing filter.

Take polarized glasses, look at any LCD monitor (cell phone display or payment terminal monitor) and rotate the glasses 90 degrees relative to the monitor. If the lenses of the glasses have a filter, the image will darken or become completely dark. If the glasses are simple, then nothing will change.

One small note, this test works exclusively with LCD screens.

Where else are polarizing filters used?

The use of polarized light and polarizing filters in everyday life is much wider than just use in sunglasses. Here are a few everyday examples that many people use in their homes and do not think about the fact that this is polarization.

3D glasses- glasses for watching movies with 3D effect, work on polarized image separation. It all works very simply, the visible image (on the TV screen) is divided into stereo pairs (two separate images), which have different polarization (for example, the left image has vertical polarization, and the right one has horizontal polarization).

3D glasses also have two lenses with different polarization (for example, the right lens has vertical polarization, and the left lens has horizontal polarization). The eyes each see their own image, and the brain combines it all together and creates the illusion of volume.

Polarizing filters for cameras- the filter consists of 2 rings, one of them contains a polarizing filter, by rotating which you adjust the degree of polarization. It works the same way as with sunglasses, your photos will be more saturated. For example, if you are shooting a landscape, the clouds will stand out in more contrast against the blue sky, and the vegetation will look more lush.

Video on how to check polarized glasses

Watch the short video and everything will become clear. This polarization test works exclusively with LCD screens.

Everything is extremely simple!

Polarized glasses, or otherwise called anti-glare glasses, can not only save you from bright light. Thanks to them, the eye is able to more clearly see a picture that has been illuminated by the sun’s rays, and any distortions that have arisen are corrected.

About polarization

The sun's rays, reflected from different surfaces, can continue their path in a horizontal or vertical direction. With the vertical continuation of the reflected rays, the human eye is able to distinguish surrounding objects without any difficulty. With horizontal reflection, the rays overlap the image to some extent due to the glare that forms. It is in order to eliminate light distortions that polarized glasses are used. To easily understand what polarized glasses are, you just need to imagine a certain filter blocking horizontal rays.

A polarized surface is a material that is covered with a protective thin film. When ultraviolet rays hit the surface layer, the rays are absorbed by it. As a result, a person sees only vertically directed waves of light, which do not create interference when viewing objects. Due to the absence of horizontal rays, image contrast increases and brightness decreases, which overall reduces eye strain.

Who needs anti-reflective lenses?

The majority of consumers of polarized glass are motorists. When traveling they simply need perfectly clear visibility to reduce the risk of emergency situations. Polarized lenses can eliminate the following visual disturbances: glare from the dashboard, windshield, wet asphalt; they also cope well with the glare of the headlights of an oncoming car. If the glasses use lenses that absorb UV rays, even on a very sunny day the driver will be able to see all objects on the road without problems. It is worth noting that experts have already proven that the driver’s reaction significantly increases when using polarizing glasses.

The second most popular use of anti-reflective glass is fishermen. Everyone knows that bright sunlight on the surface of the water leaves significant glare. It is for this reason that avid fishermen use polarized sunglasses while fishing. Why do they need this? Thanks to anti-reflective lenses, the fisherman sees the water surface perfectly even on a clear afternoon.

Polarization also plays an important role in the training process of athletes. When skiing or surfing, the sun's rays can create some interference, which is completely unacceptable. Indeed, in the absence of excellent visibility for athletes, continuing to train may be unsafe or may lead to injury.

Benefits of polarized sunglasses

Polarized sunglasses have several positive properties. Important advantages of polarized lenses are:

• reducing stress on the nerves of the eyes;
• protection of vision from the negative effects of ultraviolet rays;
• natural color rendering;
• improved visibility as a result of reduced brightness.

Negative points

Polarized lenses do not and, in principle, cannot have any disadvantages. They are easy to use and safe for your eyesight. Yet there are several disadvantages to these glasses, which include the following points:

• Driving lenses sometimes distort the image on the navigator screen;
• inexpensive polarized glasses have a thin polarizing layer, which quickly wears out during use and begins to peel off;
• High-quality anti-reflective lenses are much more expensive than conventional framed sunglasses.

How to choose the right polarized lenses

You won't be able to buy polarized glasses that are suitable for different occasions and conditions. When choosing anti-reflective lenses, it is recommended listen to the advice of experts:

How to check polarization

Not all manufacturers produce genuine and high-quality goods. That is why it is necessary to have knowledge how to check polarization when purchasing anti-reflective lenses. In fact, it is very simple to determine the presence of anti-reflective lenses in the model you choose. What needs to be done?

It's simple: the selected polarized sunglasses must be brought to any LCD monitor. If the polarizing lens is turned to the display at an angle of 90 degrees, the image will darken. If the lenses are not equipped with polarization, then the experiment will not work - the monitor can be clearly seen through the glass. To verify authenticity, instead of an LCD monitor, you can use another polarized glasses. The effect should be the same - one of the lenses will darken.

If you wear regular medical glasses

If you have visual impairments, then wearing polarized glasses is more difficult. Of course, this is not to say that the problem cannot be solved. However, in such a case, using lenses with an anti-reflective effect is quite expensive. Ordinary polarized glasses will not work - they are not capable of correcting vision. In this situation, you can use two options: wear contact lenses or use special anti-reflective pads.

Using the first option is not entirely convenient, since this method involves regular expenses for replacing lenses. In addition, some people simply cannot wear contact lenses.

The more profitable option remains use of anti-glare pads. They replace polarized sunglasses. Not everyone knows what it is. A polarizing pad is a design made from a pair of anti-reflective lenses that is attached to medical glasses. All manipulations are very simple - the product can be easily removed and put on your frame, and the user does not feel discomfort.

Where can I buy

To protect yourself from purchasing counterfeit polarized glasses, you should only contact verified online stores. For example, you shouldn’t flatter yourself that you can buy an original model of anti-glare glasses on the AliExpress website for 300 rubles with free shipping.

In addition to the Internet, polarized lenses can be found in specialized optics. So, you can not only make sure of the quality of the glasses and the polarizing layer on the lenses, but also choose a frame model that suits your face type.

To check glasses for polarization at home, a person is recommended to resort to one of the tests that will help solve this seemingly difficult task. Polarization is required to reflect horizontal sunlight and is indispensable for drivers, people who often work near bodies of water, and athletes.

What is polarization?

Polarization refers to the direction of light, which can be horizontal or vertical. If we talk about the latter, then such rays enable the visual organs to determine colors and tones. Horizontal, on the contrary, prevents this. Instead of a clear picture, glare appears before your eyes. Eliminating these waves results in a better image, which has clear edges and vibrant colors. People notice not only what gives a reflection, but also look at things through rain, water or fog.

Why do you need glasses with polarized lenses?

Not so long ago, polarized filters were quite difficult to manufacture; their production scheme was complex. Such objects were used exclusively for certain types of work, for example, in industrial practice or cinema, when the absence of light interference is extremely important. Nowadays, the production scheme has changed and has become much simpler, which makes it possible to produce strong and thin glass.

Almost everyone can afford polarized glasses these days. Initially, they were used by drivers and pilots. Later, people closely associated with activities near water bodies began to resort to their help. Anti-glare glasses are also indispensable for athletes. They are preferred by skiers and cyclists. In addition, such devices will also be useful for patients who have certain problems with visual functions. Ophthalmologists recommend that people who suffer from severe photosensitivity must purchase such lenses.

Advantages and disadvantages

Polarized glasses eliminate glare and make it possible to see the picture in front of your eyes with more contrast. In addition, a serious advantage in favor of such sunglasses is that they reduce visual fatigue. Biotic adaptations are indispensable in areas of activity that require increased concentration and image clarity.

However, despite a number of advantages, polarized glasses also have disadvantages. The main disadvantage for many people is that their price is much higher than regular ones. Polaroid glasses are considered the most expensive. In addition, such optical objects reduce the visibility of road signs because they make the reflected light weaker. They are also not suitable for people who often use a navigator or mobile gadgets with a liquid crystal display. This is due to the fact that the glasses make the image dark, making it very difficult to view the image.

Checking glasses

If a person is concerned about purchasing optical items with anti-reflective lenses, it is important to check polarized glasses in the store. In this case, it is better to go to a trusted retail outlet equipped with special indicators that make it possible to determine the quality of the polarized lens. Looking at such a test strip, through glasses you can see a picture that you cannot see without them.

If the store does not have a special device that allows you to distinguish polarized glasses from regular ones, you can use another option. You will need to take the second glasses and place them opposite. Then one of the optical objects will need to be rotated 90 degrees so that the central areas of the glasses coincide. When they darken in this zone, this indicates good quality, but if nothing has changed, then you should not purchase such glasses.

You can test polarized lenses at home. You will need to use a gadget with a liquid crystal display. You need to point the glass at it and turn it 90 degrees again. If the lenses are good, then the picture through them should no longer be visible, as shown in this video: www.youtube.com/watch?v=ZxC94lnchrw.

Dark or, more correctly, sunglasses are an accessory loved by both men and women. It is not always used for its intended purpose - there are still popular jokes about how many girls use “the most fashionable glasses this season” exclusively as a hairband. Some people so cannot imagine existing without sunglasses that they remain in them even in the evening, when the sun has long gone below the horizon, both in a cafe and in a club. And this is understandable, because correctly selected glasses can beneficially correct the shape of the face and give a person a special charm.

Sunglasses become an integral part of the image, a favorite thing and a collectible. But today we will discuss the exclusively practical side of wearing sunglasses: in fact, do they protect from the sun and is this really what our eyes need? Or is sunlight more beneficial than harmful?

Discussing this issue, experts answer unanimously - ultraviolet radiation harms the retina of our eyes. It can cause a burn to the retina and, as a result, premature visual impairment and even blindness.

However, quite a bit of ultraviolet radiation reaches our eyes: the harshest and most harmful UV rays are blocked by the ozone layer, and some of the radiation is blocked by the lens in our eyes. But even the minimum that still reaches the retina can lead to problems. You've probably noticed that on a particularly sunny day your eyes get very tired, they literally hurt. And it’s not for nothing that we begin to squint, trying to somehow reduce the incoming flow of light; our body knows better than us what is harmful to it and what is useful, and does not want to let too much sunlight through to the retina.

By the way, this causes wrinkles around the eyes. I understand that we are unlikely to scare men with this fact, but nevertheless, why age your face if there is an opportunity to avoid it?

So, drawing conclusions from all of the above, we can definitely say that you will definitely need sunglasses:

• on a particularly sunny summer day;
• on the beach, where water and sand (white) actively reflect the sun's rays;
• in the mountains or fishing;
• on a sunny day in winter.

But it is better to avoid wearing glasses indoors, in transport, in cloudy weather, in the evening, when the sunlight is soft and does not dazzle. The fact is that constantly wearing glasses can develop a fear of light - photophobia. And then even minimal light will cause you severe discomfort.

The second question arises: which glasses to choose? They are now sold literally on every corner. Are not too expensive ones from the store next door suitable for eye protection, or should you go to the optician and fork out for some branded sunglasses?

Here we come to the most interesting part. Dark glasses are not always sunglasses. Yes, they reduce the brightness of the color, we become comfortable, we stop squinting and... harm our eyes! Because ultraviolet radiation continues to penetrate through these darkened lenses, and our pupil, deceived by the reduced brightness of the light, has expanded and calmly lets these UV rays through! In addition, fairly cheap glasses made of low-quality plastic can simply ruin your vision (for example, due to different centering of the glasses, i.e. due to the fact that the glasses are simply crooked), and through them you will see distortedly, with incorrect color rendition .

High-quality glasses can have glass or plastic lenses, but the degree of protection against UV radiation must be written on them. Or the seller must have a certificate for this product, which must indicate all the characteristics. Stickers like: “100% protection from UV rays” and “Complete ultraviolet absorption” should not be trusted, especially if they decorate glasses costing 300 rubles.

By the way, if we talk about the price of high-quality glasses with ultraviolet protection, then in principle you can spend 1500-2000 thousand rubles. Of course, this is unlikely to be a branded model, but the main thing is eye protection. GUCCI will definitely cost at least 5,000 rubles. Of course, a little expensive, in my opinion. But well-known companies value their name and the quality of their products very much, which means that for this amount you will not just buy lenses in a frame, but the confidence that the frame will not warp on the second day, the screws will not fall out, and the lenses will not be scratched, which is a degree The UV protection is as advertised and will not cause any harm to your eyes.

Wander around professional optics stores, look, estimate, read the documentation that they can provide you with. Unfortunately, my online searches showed that online stores focus on the design of the frames, but do not provide information about UV protection. Probably, in such cases, you should write to the support service, clarify the characteristics of the glasses, and ask to send certificates.

And finally, I would like to consider a question that I personally have always been very interested in: what are polarized and photochromic lenses and do we all need to wear them?

Photochromic lenses

Photochromic lenses are popularly called “chameleons”. Chameleons indoors will wear regular glasses (even if the room is sunny enough), and when going outside they will darken, depending on the intensity of the light. The operating principle of photochromic lenses is based on the content of photochromic substance molecules in the lens material, which react to ultraviolet radiation.

Chameleons have several features that can easily be considered advantages:

• Such glasses may have diopters. Which is very convenient for people with poor vision. After all, not everyone uses lenses and can choose ordinary sunglasses, but it is necessary to protect their eyes from the bright sun;
• even if the glasses are without diopters, it is still very convenient. First, because the lenses respond to light levels, you always get adequate protection. Secondly, you don’t have to take off and put on your glasses all the time if you move from indoors to outdoors and back;
• chameleons protect against glare, providing good clarity of vision.

It is worth noting that photochromic glasses do not darken inside the car, except for special chameleons for drivers.

Polarized sunglasses

The point of polarized sunglasses is that they block light glare that interferes with our vision. In general, this glare is not particularly critical, so it is not necessary to wear polarized glasses all the time.

However, there is a category of people for whom polarized glasses will be very useful. These are drivers and fishermen. I think everyone who has been driving, or even just sitting in the passenger seat next to the driver, knows how annoying the light reflected from the shiny parts of oncoming and ahead cars, as well as glare on the windshield, is. For fishermen, glasses will be relevant, as they will remove glare from the water, which makes it difficult to see the float.

Bonus tip: how to check that the glasses you were offered in the store are really polarized?

Take two polarized glasses (identical). Put some on yourself and look at the light source (incandescent lamp, sun). Then rotate the second glasses relative to the first ones by 90°, aligning them lens to lens. Let's look at the light source again. If you no longer see the light, then you can safely take these glasses. And by the way, for polarized glasses the degree of UV protection must also be indicated.

I wish you health and clear vision!