How to check and buy original polarized glasses

Glasses can serve not only to improve vision and protect from the sun. They are able to protect the eyes from blinding glare. Polarized glasses are designed specifically for this function.

Benefits of polarized glasses

Anti-glare glasses were originally used by a small number of professions. Just 30-40 years ago, the production of glasses with a polarized effect was very difficult. Therefore, specialized optical products were used only for professional purposes, for example, during photography and filming. Operators need image accuracy without light interference.

Nowadays, polarized glasses are considered an affordable product. Thanks to new methods, their production has been simplified. At the same time, modern models are made of thin and durable glass.

The main advantages of polarized optical products include:

elimination of glare and reflections;
reduction of eye tension and fatigue;
increasing image contrast;
reducing the effect of ultraviolet rays on the eyes.

It is worth adding to this that anti-glare glasses are a solution for people with poor tolerance to bright light. This type of optical products is indispensable in some areas. Polarized sunglasses are very popular among drivers. They allow you not to lose control of the road in any conditions. Athletes involved in alpine skiing often resort to the use of such glasses.

Fishing enthusiasts also appreciated the effect of anti-reflective optics. This popular activity requires a lot of attention and concentration, and glare appears on the surface of the water at the slightest movement.

Checking polaroid glasses

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 are recommended for use when there is increased strain on the visual organs.

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 you take 2 copies and place them opposite each other, the overlap area should darken, which indicates the quality of the optics. 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..com/watch?v=ZxC94lnchrw.

How to extend service life?

In order for polarized lenses to last as long as possible, a person needs to remember simple principles. First of all, optical objects should be stored in a strong case.

Its material must be durable and protect from damage. The interior should be upholstered in soft fabric. A similar material is used to wipe lenses. Often such a cloth is provided with glasses.

Do not wipe lenses with clothing or thick materials.

If your glasses become seriously dirty, you can clean them with running water and soap. Other means, according to experts, should not be used.

The care of the glasses owner will also help protect the lenses from damage. They should only be placed with the glass facing up to prevent scratches.

If a person plays sports, breakage and loss of optical items can be avoided by attaching a chain to them.

Source: https://EtoGlaza.ru/och/kak-proverit-polyarizatsionnye-ochki-ili-net.html

Disadvantages of polarized glasses

Despite having a large number of advantages, such models also have their disadvantages. They cannot be called significant, however, we list them:

the price is higher than regular sunglasses;
the image on the LCD screens of tablets, smartphones, and navigators becomes darker;
the brightness of road signs decreases, as the glasses extinguish the reflected light;
In inexpensive models, the special layer quickly wears off, causing the unique properties of the glasses to be lost.

When choosing a model, you should weigh all the pros and cons. In most cases, the benefits are still greater than the disadvantages.

Advantages and disadvantages

Polarized glasses are recommended for use when there is increased strain on the visual organs.
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.

How to check whether glasses are polarized or not

It is impossible to identify polarized glasses by their appearance. Therefore, before purchasing, you need to know how to test polarized glasses.

It is better to buy such products in specialized optical stores or online stores. You should check your glasses when purchasing. Firstly, there will be an opportunity to evaluate the properties of the glasses, and secondly, the seller will give a receipt; if the product turns out to be of poor quality, it will be subject to exchange. Thirdly, in special stores the guarantee of buying a good product is greater than in the open sale on shelves with ordinary sunglasses.

Checking your glasses won't take much time. There are two ways to determine the properties of polarized glasses in a store:

If such a product is available, the seller in the store must have indicator strips with which the test is carried out. If you look at them with glasses with a special filter, you can see a drawing that is not visible without them.
You need to take two pairs of polarized glasses and place them opposite each other. One pair is rotated 90 degrees so that the centers of the glasses coincide. When the products are of optimal quality, the lenses should darken at the coincidence points. If no changes occur, then the product did not pass the test.

How to determine the presence of unique properties if you don’t have an indicator picture and second glasses at hand, we’ll look at it below.

What are polarized glasses?

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).

How to test polarization models at home

If you couldn’t check the polarized glasses when purchasing, you can do it at home. It is also possible to define model properties in two ways:

To check the glasses, you need to rotate them 90 degrees to the liquid crystal display (TV, monitor, tablet, smartphone). When the product is of high quality, the image will not be viewed through the lenses.
The test is carried out using an aquarium. You need to look at the bottom of the container through polarized glasses. If they have a special filter, it will allow you to see small details even through cloudy water.

A home test of polarizing models will be no less accurate than a test done in a store.

Equipment

The original Polaroids must include a passport , which consists of several laminated sheets with information in Russian, among other things. The first page contains the name of the collection. The following pages should contain:

Barcode
Model number
Instructions
Information on compliance with the requirements of the European Directive 89/686 EEC

Polaroid glasses passport

Using the individual model number, finding the copy you like on the Internet will be as easy as shelling pears.

By the way, read this article too: Dolce Gabbana glasses: how to distinguish the original

Cost of polarized models

The quality of the filter determines the price of the product. Quality, in turn, is determined by optics production technology. Currently, two technologies are used:

The filter is applied to the outside of the lenses. In this case, the glasses will lose their properties faster, but their price will be lower.
The filter is embedded between the layers of the lens. This method guarantees the strength and durability of the optical product.

The cost of various models can range from several hundred rubles to several thousand.

Where to buy and how much do these glasses cost?

If you decide to purchase polarized glasses, then head to a specialized store. You won’t find a good quality product on the same shelf as regular sunscreen models. At an optical store, you will not only get useful glasses, but you will also be able to test them on the spot. The seller will give you a guarantee and, in case of defects, will exchange the goods.

The price of polarized glasses can range from several hundred to thousands of rubles. The cost depends on the technology used to make the lenses. If the filter is placed on the outside of the glasses, they will be cheaper and less durable.

It is better to purchase models where the filter is built into the lens, that is, located in the middle. To accomplish this task, two very thin lenses are made, a polarizing filter grid is placed between them, and then they are glued together. This ensures durability and long service life of the glasses.

How do polarized lenses work?

Ophthalmologists around the world recommend the use of special glasses to protect eye health from the harmful effects of ultraviolet radiation from the sun. Polarized glasses are one of the types of sunglasses. In Europe and the US, polarized lenses have become the standard for premium optics over 20 years ago.

Typically, light rays are scattered in space in all directions. But when they are reflected from flat surfaces, they become polarized - they move grouped in one of the directions (mostly horizontal). Intense reflected light dazzles the eyes in sunny weather and reduces visibility. Polarized lenses contain a special filter that gives them improved properties:

Reducing glare reflected from roads, ponds, snow, and other horizontal surfaces.
Only vertical light passes through the filter.
Enhances contrast, ensuring visibility without interference.
More accurate distance estimation near and far.

How polarized lenses work

Light entering the eyes after passing through polarized lenses is filtered, allowing the user to see the world a little differently. Regular sunglasses reduce the intensity of all rays. Polarized lenses can completely eliminate glare.

Comparison of images without and with polarized lenses

Maximum polarization occurs when the sun is about 37 degrees above the horizon (at Brewster's angle). If it is lower or higher, then the degree of filtration decreases. The intensity of ordinary unpolarized light in such glasses is always reduced by at least half.

These lenses are useful for people involved in the following activities: