How to check polarized glasses at home

Recently, at the hearing of the phrase polarized glasses. What it means: another marketing ploy or something really good. After all, more and more buyers prefer glasses equipped with polarized filters.

What is polarization

In simple terms, polarization is the direction of light, which can be vertical or horizontal. If the vertical rays allow the eye to determine colors and shades, then the horizontal rays interfere with this. Because of them, instead of objects, we see glare or cannot see clear contours.

If you eliminate the horizontal light waves, the image becomes clear and bright.You can not only see what glitters in the light, but also to view objects through the storm and rain, muddy water and fog. Such a finding makes polarizing filters indispensable in some professions and hobbies.

Why do I need glasses with polarization

A few decades ago, the technology of manufacturing polarizing filters was very difficult. They were used only for certain works in productions, in the cinema and in photography, in which accuracy and the absence of light interference are needed. Today the technology is much simpler and allows you to create high quality lenses, thin and durable.

Polarized glasses have become a popular product. First, their advantages were appreciated by drivers, pilots, then by people engaged in fishing. Today such glasses are widely used in many sports (skiing, rowing, cycling, and others).

Many buyers are interested in glasses, which have polarizing filters, not only because it is fashionable, but also useful for the eyes. For example, if a person suffers from sensitivity to light or has to spend a lot of time in the open sun, then such an acquisition would be the best solution for him.

It is worth noting that such a filter does not protect against ultraviolet radiation, but only from glare and other interference. But thanks to him, the load on the retina is reduced and vision does not deteriorate.

Where to buy and how much are these glasses

If you decide to buy glasses with polarization, then go to a specialty store. In the free sale on the same shelf with the usual sun-protection models you will not find a good quality product. In the optics store, you will not only get useful glasses, but also be able to check them on the spot. The seller will give you a guarantee and in the event of a marriage exchange the goods.

The price of glasses with polarization can vary from a few hundred to thousands of rubles. The cost depends on the technology for the lenses. If the filter is applied to the outside of the glasses, they will be cheaper and less durable.

It is better to purchase models where the filter is embedded in the lens, that is, it is in the middle. To perform such a task, two thinnest lenses are made, a grid of polarization filter is laid between them, and then they are glued together. This ensures durability and long service points.

How to check polarized glasses

Check the goods from the cash register. In the store you can find out how high-quality glasses that you are going to buy.

How to check in the store:

1. In good outlets, sellers have special indicator strips that will help to know the quality of the polarizing filter. Look at the indicator through the glasses and you will see an image that cannot be seen without them.
2. Take the second glasses with polarization, put them opposite each other, and then rotate one by 90 degrees, so that the centers of the lenses coincide. If in the places of coincidence they have darkened, then the quality points, if the visibility has not changed, then no.

What to do for those who have long polarized glasses, and check them in the store will not work. In this case, there are several tricks.

How to check at home:

1. Turn on the monitor, TV or smartphone, as long as it has an LCD display. Point the glasses at him and turn again 90 degrees. If the filter quality, then the image through the lens should cease to be viewed.
2. If you have an aquarium at home, then look at its bottom through your glasses. A good filter will make it clear that there is even through muddy water.

These methods are enough to understand what are the points in front of you, normal or with polarization.

What can the color of the lenses say

Going into the store, you can get confused by the diversity of such models. To choose the most suitable for you, pay attention to the color of the lenses. He will tell about the main properties of points:

Blue lenses. Designed for those who need to work on the water. They eliminate glare even from a large surface area;

Yellow lenses. Created to improve visibility in cloudy weather or at night;

Pink lenses. Increase the clarity of the image, with them you can see that it is difficult to see with the usual eye;

Black lenses. Inserted into ordinary sunglasses that do not transmit ultraviolet light.

Now, when you go to the store, you will not get lost and will not choose the color based on personal taste and preferences.

Advantages and disadvantages

To decide whether to buy polarized glasses or do without this function, you need to weigh all the pros and cons of the purchase. After all, a good model will cost a lot of money, and a cheap one will not give the desired effect.

Benefits:

• no glare and glare;
• eyes do not get tired from long tension;
• create protection from direct sunlight;
• irreplaceable in certain activities;
• help people prone to photosensitivity.

Disadvantages:

• when the sun is at its zenith, glasses will not be able to protect;
• high price;
• if you have vision problems, glasses will not be able to fix them;
• attenuate light from signs on the road, side lights and brake lights;
• may distort the distance;
• inconvenient if you use a navigator or other devices with an LCD display, as they darken the image on it.

Using glasses with polarization is indisputably convenient, and if you take into account the small drawbacks, you can avoid the problems that they cause.

What to do so that the glasses serve for a long time

If you want your purchase to please you for years and help protect your eyes, then follow the rules for storing glasses with polarized lenses:

1. Get a quality case, durable outside and covered inside with natural leather or fabric.
2. Use a soft cloth to clean your lenses; it usually comes with glasses. Do not rub them on clothing or coarse cloth.
3. If the glasses are very dirty, wash them with soap and water, other detergents are not recommended.
4. Do not put glasses with lenses down, as scratches will appear on them. So that the glasses do not accidentally fall, fix them on a chain.

The quality and durability of the polarized glasses depends on the manufacturer. Firms that respect their customers always sell goods through a network of pharmacies and opticians, so you should not save and buy them in questionable stores, but rather go to specialists.

Video: how to check the polarization of glasses using a monitor