How to check polarized glasses at home

Recently, a collocation of polarizing glasses has been heard. What does it mean: another marketing ploy or something really sensible. Indeed, more and more buyers prefer glasses equipped with polarizing filters.

What is polarization?

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

If horizontal light waves are eliminated, the image becomes clear and bright. You can not only see what sparkles in the light, but also consider objects through a storm and rain, muddy water and fog. This finding makes polarizing filters indispensable in some professions and hobbies.

Why do I need glasses with polarization

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

Polarized glasses have become a public commodity. First, drivers, pilots appreciated their advantages, then people involved in fishing. Today, such glasses are widely used in many sports (skiing, rowing, cycling and others).

Many buyers are interested in glasses that have polarizing filters, not only because it is fashionable, but also good for the eyes. For example, if a person suffers from sensitivity to light or is forced 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 it, the load on the retina is reduced and vision is not spoiled.

Where to buy and how much are these glasses

If you decide to purchase polarized glasses, then head to a specialized store. In free sale on the same shelf with ordinary sun-protection models, you will not find good quality goods. In the optics store you will not only get useful glasses, but you can also check them on the spot. The seller will give you a guarantee and in case of marriage will exchange the goods.

The price of polarized glasses can range from a few hundred to thousands of rubles. The cost depends on what technology the lenses are made. 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 built into the lens, as it were, that is, it is in the middle. To accomplish such a task, two thinnest lenses are made, a grid of a polarizing filter is laid between them, and then they are glued together. It provides durability and long service points.

How to check polarizing glasses

Check the goods on the spot. In the store itself, you can find out how good the glasses you are going to buy are.

How to check in store:

1. In good retail outlets, sellers have special indicator strips that will help you 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 polarized glasses, place them opposite each other, and then rotate one 90 degrees so that the centers of the lenses match. If in the places of coincidence they darkened, then the glasses are of high quality, if the visibility has not changed, then no.

What to do for those who have long had polarizing glasses, and they won’t be able to check them in the store. There are several tricks to this case.

How to check at home:

1. Turn on the monitor, TV or smartphone, the main thing is that it has an LCD display. Point the glasses at him and turn again 90 degrees. If the filter is of high quality, then the image through the lenses should stop being viewed.
2. If you have an aquarium at home, then look at its bottom through your glasses. A good filter will make it possible to discern what is there even through muddy water.

These methods are enough to understand which glasses are in front of you, ordinary or polarized.

What color lenses can say

Entering the store, you can get confused by the variety of such models. To choose the most suitable for you, pay attention to the color of the lenses. He will talk about the main properties of glasses:

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

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

Pink lenses. They increase the clarity of the image, with them you can see what is difficult to see with the ordinary eye;

Black lenses. They are inserted into ordinary sunglasses that do not transmit ultraviolet light.

Now going to the store, you will not be confused and will not begin to choose the color, based on personal taste and preferences.

Advantages and disadvantages

To decide whether to purchase polarizing 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:

• lack of glare and glare;
• eyes do not get tired of long tension;
• create protection against direct sunlight;
• irreplaceable in certain types of activity;
• help people prone to photosensitivity.

Disadvantages:

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

Using glasses with polarization is undeniably convenient, and given the small disadvantages, you can avoid the problems that they cause.

What to make glasses last for a long time

If you want your purchase to please you more than one year and help protect your eyes, then follow the rules for storing glasses with polarizing lenses:

1. Get a quality case that is durable on the outside and coated inside with genuine leather or fabric.
2. To clean the lenses, use a soft rag, it usually comes with glasses. Do not rub them on clothing or coarse cloth.
3. If the glass is very dirty, wash it with soap and water; other detergents are not recommended.
4. Do not put the glasses with the lenses facing down, as scratches will appear on them. To prevent glasses from accidentally falling, fasten them to a chain.

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

Video: how to check glasses polarization using a monitor