How to choose sunglasses based on glass quality. I’m embarrassed to ask: how and why to protect your eyes from the sun’s rays? From a technical point of view

Sun safety glasses- This is an indispensable accessory at any time of the year. Their main task– protect your eyes from UV radiation. On sale you can find models that not only provide positive influence on the eyes, but also look beautiful. Of course, in recent years sunglasses are more often used as fashion attributes. They complement your look, make you stand out from the crowd and add charm.

Branded glasses high quality have several equally important properties.

• prevention of wrinkles in the corners of the eyes and bridge of the nose;
• prevention of premature skin aging;
• protection of the face from negative UV exposure.

It is also worth knowing that there are models not only for daily use, but also for specific cases:

• for staying on the beach (they have completely tinted windows);
• sports (special form);
• to work in special conditions(motorists, rescuers, etc.);
• improving vision.

The wide variety of models often confuses buyers. We found out how to choose the right sunglasses and what you should pay attention to when purchasing:

1. Try a few different forms to accurately select the most suitable one.
2. Focus on the type of lenses you need depending on the purpose of the glasses (sports, recreation, work, etc.).
3. Don't forget about the size - incorrectly selected glass or frame can cause discomfort and at the same time look strange.
4. The most important thing about sunglasses is their quality. The higher it is, the better your skin and eyes will feel.
5. Pay attention to the manufacturer. Only the best ones are truly made worthwhile goods, which performs important functions for wrinkle prevention, UV protection, etc.

Our rating will help you successfully cope with all the points and choose the most suitable model for you personally. We will tell you which brand fashion glasses are worth the money, and for which there is no point in overpaying and which inexpensive models are the best. Rating of the best sunglasses will save not only time on searching, but also your money.

The world's best sunglasses brands

4 DKNY

Popular youth brand
Country: USA (manufactured in China)
Average price: 10,000 rub.
Rating (2019): 4.5

The DKNY brand presents a collection of sunglasses for free-spirited people who are not afraid to experiment with their appearance. The company's models are made of lightweight but durable titanium and hypoallergenic cellulose acetate material. The lenses have excellent protective properties. DKNY accessories combine well high comfort and successful style solutions. They are very popular among young people who know a lot about fashion. In addition, the company's sunglasses are highly wear-resistant.

In the catalog you can find frames of the most different colors(plain color, with patterns, etc.), they are made of plastic good quality. Nose pads are most often non-adjustable. The lenses mostly come in one tone. By the way, the company regularly introduces new aviator models. The average price of glasses is 10,000 rubles. Main advantages: popular youth brand, excellent wear resistance, beautiful stylish design, good choice.

3 FENDI

Best quality
Country: Italy
Average price: 16,600 rub.
Rating (2019): 4.6

FENDI's famous cat-eye sunglasses are a combination of sophisticated design and practicality. Durable materials make this model especially durable. They are made according to the best technologies made of high quality plastic. The designers of the Italian Fashion House worked hard to create a unique style. These branded glasses meet modern fashion trends. There are several frame colors to choose from: blue and black. A beautiful case allows you to protect this accessory from scratches in a woman's handbag. Fashion trend The house of FENDI did not ignore the round mirror lenses. This year he introduced a new line of such glasses.

Advantages:

• stylish appearance;
• good quality plastic;
• excellent protection against UV rays.

Flaws:

• high price.

2 Prada

The most stylish design
Country: Italy
Average price: 14,500 rub.
Rating (2019): 4.8

The Italian fashion house has long established itself as a leader in the production of sunglasses and other accessories. The model is completely made of high quality plastic. This provides good wear resistance. Many customers claim to wear Prada sunglasses for 7 seasons or more. Model range consists of several colors to choose from (brown, tortoiseshell, etc.). The appearance of the glasses corresponds to the latest world trends. They will make any look fashionable and bright. These branded glasses also have high protective properties. They prevent wrinkles in the corners of the eyes and prevent premature aging of the skin. In 2018, Prada introduced several aviator models with mirrored lenses, which are especially popular this year. Spraying is available in different shades to choose from.

Advantages:

• reliable;
• stylish;
• have an unusual design;
• made of high quality plastic.

Flaws:

• high price.

1 Ray-Ban

The best sun protection
Country: Italy
Average price: 11,700 rub.
Rating (2019): 4.9

Everyone knows the famous Ray-Ban aviators, which are preferred by many world-famous stars. Ideal shape, high-quality lenses and frames made of reliable metal - all this makes Ray-Ban sunglasses leaders on the market. Fashion brand Initially, he was engaged in the production of corrective frames, and subsequently launched the production of everyday models. Therefore, the lenses in these glasses not only provide excellent protection from the sun, but also do not harm the eyes. In addition, Ray-Ban sunglasses look very stylish. There are many color options for both frames and glass to choose from. One of the most popular models is with a mirror effect. This year, the Ray Ban brand decided to bring back the famous gray haze on the lenses. She gives the image a special romance.

Advantages:

• high quality materials;
• wear-resistant;
• excellent sun protection;
• stylish design;
• wide model range.

Flaws:

• high price.

Best Sunglasses Brands at Affordable Prices

3 Vittorio Richi

Best price
Country: Holland (manufactured in Hong Kong)
Average price: 1400 rub.
Rating (2019): 4.5

Vittorio Richi's budget sunglasses are simple yet stylish design. They are an example of excellent value for money. During production, all technologies are followed, which allows the manufacturer to produce high-quality and reliable products. Lightweight plastic frames that are almost impossible to damage and lenses made of the same material that can protect your eyes and skin from the sun are an excellent combination.

Advantages:

• low price;
• high sun protection;
• good materials.

Flaws:

• After some time, scratches may appear;
• The case is suitable for short-term use.

2 Legna

Optimal price-quality ratio
Country: Italy (made in China)
Average price: 2300 rub.
Rating (2019): 4.6

The beautiful appearance of sunglasses from the Italian manufacturer is distinguished by the use of high-quality materials. In addition, they are great for both daily wear and sports activities. They protect well from the sun and have polarizing properties. At the same time, they are optimal in cost. The line includes 3 lens colors to choose from: brown, purple and green.

Advantages:

• equipped with double impact resistance;
• polarization;
• optimal price;
• high production standards;
• beautiful design.

Flaws:

• case without frame.

1 Polaroid

Better eye protection
Country: Italy (produced in Slovenia, China)
Average price: 4200 rub.
Rating (2019): 4.9

Polaroid is a true legend among sunglasses. Polarizing properties combined with lenses produced using unique technology have made these branded glasses famous throughout the world. Their design is also equipped with absorbers sun rays and special protection against scratches. Thanks to the shock-absorbing layers, the lenses become especially durable and flexible. Manufacturing material – plastic. Convenient rectangular shape frames – distinctive feature fashionable Polaroid. The line includes two types of glass: mirror and classic, as well as two colors: green and black.

Advantages:

• convenience;
• high protective properties;
• stylish design;
• reliability;
• unique lens production technology.

Flaws:

• not found.

Best Sports Sunglasses Brands

3 Bradex

The most multifunctional
Country: Israel (made in China)
Average price: 600 rub.
Rating (2019): 4.6

Bradex sports glasses come with as many as 5 interchangeable lenses, two cases, a lanyard and several frames. All this can be used depending on the weather, activities, etc. There is a lens designed for driving in fog, another protects from particularly bright sun, and a third is suitable for daily use. Multifunctionality is not the only advantage of Bradex sunglasses. They are also distinguished by the use of good quality materials (plastic, rubber, etc.).

Advantages:

• 100% sun protection;
• multifunctionality;
• a large number of necessary items included;
• low price.

Flaws:

• low wear resistance.

2 Julbo

Large selection for different sports
Country: France
Average price: 8000 rub.
Rating (2019): 4.7

The world-famous French brand Julbo produces sunglasses for various sports. Founded back in 1888, it now has extensive experience in producing the most comfortable and safe models for sports. The company's product range includes several lines: Zebra - for cycling and running, Octopus - water and sailing; Cameleo – deserts and mountains. Any glasses are guaranteed to protect your eyes from UV rays and also belong to the first optical class. Almost all models are made in several versions, differing in frame color and lenses.

Lenses are available both photochromic and polarized. By the way, the brand even produces glasses with lenses made from mineral glass. In the collection you can find interesting models for skiers and climbers. And especially for rock climbing, the company has sunglasses that block 90% of visible light. Important Feature brand products - impact-resistant glass. Advantages: high optical transparency, lens material close to glass, huge range, best reviews, glasses for a wide variety of sports.

1 Oakley

The most wear-resistant
Country: Italy
Average price: 13,400 rub.
Rating (2019): 4.9

Highly durable branded glasses designed specifically for sports. They have increased impact resistance and strong defense from UV rays and bright light. Thanks to special technology, sunscreens Oakley glasses have perfect visibility without any distortion. Special pads provide anti-slip properties even on wet skin. The kit includes interchangeable lenses of different colors, which are used depending on the situation. A reliable case will serve you well for a long time. The glasses themselves are also highly wear-resistant.

Advantages:

• very wear-resistant;
• have a reliable design;
• almost not felt on the face;
• they are almost impossible to scratch or break;
• they sit very comfortably and do not press anywhere, even during long periods of sports;
• stylish modern design.

Flaws:

• high price.

At all times, people have tried to protect their eyes from direct impact sun rays: in China, the face was covered with wide-brimmed hats, in Japan, fabric blindfolds with slits were put on the eyes, into which mica was inserted, and in India they were covered with silk strips impregnated with resin. Real sunglasses appeared 200 years ago, and they were intended for soldiers of Napoleon's army.

Why do you need sunglasses?

The main purpose of sunglasses is to protect your eyes from direct sunlight.
What is the danger of such exposure?
Sunlight consists of a collection ultraviolet And infrared rays different lengths. And, if infrared rays are mainly scattered in atmospheric moisture, then ultraviolet rays with a length of 280 to 380 nanometers reach the ground, they are absorbed by the lens, which, while protecting the retina, itself suffers:

• Over the years, the proteins in the lens begin to lose their natural structure and begin to become cloudy, leading to the development of cataracts.
• The ability of the lens to focus on close objects is also lost, its elasticity decreases, which leads to the development of farsightedness.

We will tell you what technical specifications pay attention to sun protection optics so that you can choose glasses that will protect your eyes from exposure to ultraviolet radiation.

Glass or plastic?

Despite the fact that glass lenses do not transmit ultraviolet rays at all, 95% of modern manufacturers prefer special plastic:

• Glasses with plastic lenses lungs.
• They are not traumatic, which is especially important if you choose models for children and drivers.

Be careful! Whatever material you choose to make sunglasses from (glass or plastic), their main task is protection from ultraviolet rays, and whether the glasses will reliably protect your eyes does not depend in any way on the color of the lenses.

Dark lenses or light ones?

Lenses can be both dark and transparent, but they will absorb ultraviolet rays equally well only if they are covered with a special ultraviolet filter on top.

Manufacturers of high-quality sunglasses carefully monitor this, and be sure to indicate the degree of ultraviolet protection in the labeling.
If you see a sign on the temples of your glasses or in their documents "UV400", this means that these are high-quality sunglasses.

The number 400 in the marking was not chosen by chance. It means that ultraviolet waves, the length of which is measured in nanometers and equal to 400 units, will not penetrate the protective coating. In cheap glasses, the lenses are only colored, darkened, and not covered with a special filter.
The pupil under dark lenses expands, ultraviolet rays easily penetrate under the darkened lenses and are absorbed by the lens, which is very dangerous for vision.

Be sure to pay attention to Will glasses protect you from ultraviolet radiation?, and only then choose degree of light transmission of lenses- their shading. Special markings will also tell you about this; as a rule, on the temple of such glasses there may be the following inscription: “ Cat. 3" or " Filter cat. 3».

Classification of glasses according to the degree of light transmission

• Glasses with 0 degree of light transmission almost transparent. They transmit from 80 to 100% of sunlight. They are recommended for sports types activities in the absence of bright light.
• Glasses with 1st and 2nd degree of light transmission transmit from 43 to 80% and from 18 to 43% of light, respectively. They are recommended to be worn in low to medium sunlight.
• Glasses with 3 degrees of light transmission should be chosen to be worn in very bright sunshine.

The choice will depend on where and when you plan to wear your sunglasses:

• For our latitudes in the hot summer, the optimal choice would be glasses with 2-3 degrees of light transmission.
• For spring and early summer mornings, glasses of 1-2 degrees of light transmission are ideal.
• If you decide to conquer mountains, then choose the darkest category 4 glasses.

Once again, we emphasize that the degree of shading of the lenses does not in any way affect their properties of protection from ultraviolet radiation. But the color and size of the lenses determines whether the eyes will feel comfortable.

Lens color and size

Not all colors and shapes of lenses will be comfortable for the eyes.

• Thus, our experts advise you to opt for glasses with brown, green or gray shades of lenses, which are considered the most pleasing to the eye, and you should be extremely careful when choosing models with colored lenses.
• Drivers are advised to choose glasses with gradient lenses that are darker on top than on the bottom.
• Pay attention to the lens size. They must be big. It is not recommended to choose glasses with narrow lenses. The whole point of UV protection in this case is lost, because small lenses transmit rays through unobstructed areas and limit the field of view.
• Glasses should sit comfortably on your face, fit against it, but not squeeze your temples or put pressure on the bridge of your nose. This may cause headache and fatigue.

Quality issue

Information about the quality of the materials used can always be found on the label, which indicates what the lenses are made of, as well as from the markings on the frame or from the product passport.

The abbreviations 89/686/EEC, ANSI Z80.3, AS 1067, EN 1836 mean that the glasses are of high quality and the materials used for their manufacture meet global safety standards.

High-quality glasses are always equipped with instructions that describe all the features of the model you have chosen.

You can also check the quality of the lenses by contacting the specialists of the Glasses and Fashion salon on the street. Vasenko, 4, where with the help optical device- a spectrophotometer or calorimeter - you can ensure the safety of the sunglasses you choose.

It is better not to wear glasses at all than to wear low-quality models. Only wearing glasses with UV protection will protect your eyes. This is the first and most important thing you should pay attention to when choosing a quality product. How dark the glasses will be and what shape they will have is a matter of taste.

Today we will talk about sunglasses.

With regard to sunglasses, the previously given classifications based on frame materials (metal, plastic, combined) and frame type (solid, semi-rimless and rimless) apply.

You can also divide them into types based on specific characteristics.

Based on light transmission, sunglasses are divided into 5 categories:

Category 4 - maximum, 3-8% light transmission they provide maximum protection in conditions snowy mountains, bright sun in glaciers, etc. You cannot drive a car in them, since when moving from light to shadow, visibility in them is greatly reduced;

Please note: these are categories of protection from light, not from ultraviolet radiation. Category 2-3 glasses may protect your eyes better from ultraviolet radiation than category 4 glasses. Pay attention to other factors and markings.

Based on the lens material used, sunglasses can be divided into:

Glass. Quality glass lenses block 100% of ultraviolet rays, which is their main advantage. Among the shortcomings - heavy weight and risk of injury in the event of a fall or accident;
- plastic;
- acrylic;
- polycarbonate;
- polyurethane.

All lenses from artificial materials similar advantages: non-traumatic, light, low price, and disadvantages: easily scratched and damaged. Maximum UV protection does not exceed 95%. On glasses with lenses made of artificial materials, look for UVA and UVB markings - types of ultraviolet radiation. The numbers show what percentage of radiation these glasses block. The UV400 marking indicates complete UV protection.

The following lens markings are also possible:

1. Cosmetic (marking on labels - Cosmetic). It is more reasonable to classify lenses of this class as aesthetic rather than actually beneficial to health - they transmit from 51 to 100% of UV rays. It makes sense to choose such sunglasses to wear during the season when the sun is least active.

2. Universal (marking on labels - General). According to ophthalmologists, this category of lenses is ideal for the climate of our latitudes. Such lenses transmit less than half of dangerous ultraviolet radiation, usually 20-50%. In addition, sunglasses of this class are well suited for wearing in the city, where a large flow of sunlight does not reach the ground due to dense urban development.

3. Special (marking on labels - High UV-protection). This class of lenses most reliably protects the sensitive retina from burns. These sunglasses are indispensable on vacation, especially in high mountains, near water, or vice versa - on the ski slopes, when the snow increases the amount of snow. sunlight.

There are several ways to limit light output using lenses:

1. Absorption: Tinting or darkening coloring of glass. The most common method allows you to get glasses of a wide variety of colors and shades, as well as different levels light transmission. Tinting itself does not block ultraviolet rays in any way, so you need to look at the protective characteristics of the lens material.

2. Photochromic effect (chameleon lenses) - introducing into the lens a substance that darkens in sunlight.
Photochromic lenses darken when exposed to ultraviolet light. In a room where there is no ultraviolet light, they gradually become lighter. Photochromic lenses are made from glass, polycarbonate and other plastics.
Artificial lighting does not affect these lenses unless it contains the short ultraviolet waves that the sun emits.
Photochromic lenses usually darken and lighten in less than a minute, but full transition from one state to another occurs from 5 to 15 minutes. Check quality photochromic lens You can do this by going out into the sunlight and covering one area of ​​the lens with your finger. A high-quality lens will darken in about 1 minute, while the closed area will remain light.

3. Polarizing filter- absorption by special films or glass with crystals of reflected light from flat surfaces.
Polarized lenses are made using substances that have the ability to filter out plane-polarized rays to reduce glare from a horizontal or near-horizontal reflective surface (eg water, snow, wet asphalt) or stray light from the sky. These lenses can be made from glass, but are generally made from plastic, such as a Polaroid film coating. Polaroid film blocks 40-60% of light, so these glasses are also sunglasses.
Check quality polarized lenses you can simply: take two pairs of glasses, align the lenses with their centers, turn one perpendicular to the other and look at the light. If the lenses are of high quality, the light will be dark.

4. Reflection: mirror coating based on application on outer surface lenses of one thin translucent layer of any non-oxidizing metal (chrome, silver, gold, platinum).
Lenses with a mirror coating can be colored, and the color of the mirror does not depend on the color of the lens. For example, there could be gray lenses with a blue mirror or brown lenses with a silver mirror. This mirror surface absorbs little of the sun's thermal rays and heats up less than lenses without a mirror.

5. Interference of light using numerous ultra-thin coatings on lenses, which refract rays differently and create the effect of multi-colored mirrors. Based on the same principle anti-reflective coating With reverse side lenses
Interference coatings differ from conventional mirror coatings in a much greater color variety, since their color depends not only on the substances used, but on the number and thickness of the refractive layers. Such coatings can be any color from mirror silver to deep purple, with some appearing in different colors when viewing the same lens with different sides(an effect such as a rainbow reflection from an oil or gasoline film on water).
The disadvantage of mirror and interference coatings is that they are usually easily scratched and lose not only their appearance, but also their light protection and transparency.

6. The use of glass with oxides of rare earth elements: neodymium oxide or didymium oxide (a mixture of neodymium and praseodymium). These lenses have violet or gray and are capable of sharply absorbing yellow rays, which is why glassblowers wear protective glasses with them while working.
Such glasses also absorb ultraviolet rays well and, in principle, can be used to protect against sunlight. They also enhance (as if highlight) red, orange, green colors and can be used by drivers, as they increase the visibility of signal lights.
However, in their pure form, didymium and neodymium glasses have a total light absorption of category 2 and, when used as sun protection for very high illumination, require additional measures to reduce brightness.

The same lenses can simultaneously use coloring, polarization, gradation, photochromic effect and mirror coating in various combinations.
Also, modern glasses often use gradation or gradient darkening - this is when the lens is darker at the top and lighter at the bottom. For the eyes, gradient shading is comfortable if the darkest part is at eye level, the lens is lighter towards the bottom.

That's all for today.
In the next, final, article we will talk about the shapes and colors of sunglasses and how to choose them taking into account individual characteristics appearance.

What do you look for when buying sunglasses? Price? Model? Matches your face shape? Convenience? That's right - these are very important parameters. But there are other nuances that you won’t find out about during a visual assessment.

We are talking about symbols and numbers on glasses, which you most likely do not know what they mean.

Most people don’t think about what the numbers on the temple mean when choosing glasses, believing that it’s just some kind of serial number. But in fact, this is the marking of sunglasses, which can tell a lot about them, of course, if you understand the symbols.

What do the numbers on sunglasses mean?

Most serious manufacturers of branded products have their own system for marking sunglasses, but some designations are still repeated and they usually mean the same parameters (not necessarily applied in the order presented below):

1) Almost always present combination of characters "CЄ» – a mark indicating the product’s compliance with quality standards accepted in Europe.

2) Inscription "Madein", indicating the country where the product was manufactured, may or may not be present on the temples. But if there is one, then the marking on the temple of sunglasses should contain exactly these words or variations like “Hand Made in”, but no “design in”, “frame”, “produced”, etc. (such inscriptions are applied only for fakes).

3) Brand name and model name/number. With many glasses popular brands instead of full name abbreviations are often used (may be part of the model designation) like P - Polaroid, RB - Ray Ban, etc.

4) Some manufacturers (for example, Polaroid, Ray Ban) indicate on some models year of manufacture(usually after the brand/model name).

5) Serial number products - 4-5 numbers (sometimes with a hyphen) that do not fit into any of the other categories.

6) One free-standing latin letter responsible for labeling sunglasses by color lenses

7) The easiest way to determine what the numbers on the frame of glasses mean is on the sides of the rectangle symbol (# □ @ $). This is accepted as standard by almost all manufacturers. designation of glasses sizes:

# - width spectacle lens at its widest point;

@ – the size of the bridge between the lenses or simply the distance between them if there is no bridge;

$ – length of the temple (from the hinge to the end).

Sometimes a fourth digit is added to indicate the height of the lens, and the rectangle is replaced with the “/” (slash) symbol.

8) As for deciphering the inscriptions on glasses in the “Filter Cat.#” format, they indicate the degree of darkness of the lenses. In place of # there can be numbers from 1 to 4 (from light to dark, with two intermediate options).

Decoding other inscriptions on glasses

Not very often, but still the markings on the temple of sunglasses may contain the following inscriptions:

1) UV*** – marking of sunglasses against ultraviolet radiation. Symbols UV (UltraViolet) - ultraviolet. The number after the symbols tells you what maximum ultraviolet wavelength (in nanometers) is filtered by the lens.

The most high degree sunglasses protection (UV400 marking) prevents 100% of ultraviolet radiation from reaching your eyes.

UV380 is slightly less protective because it only filters out 95% of UV rays.

2) There may be inscriptions like 95% UVB and 60% UVA - in this case, the lens does not transmit 95% of type B UV rays (the most harmful) and 60% of type A rays.

3) P (Polarized) – glasses have polarizing properties, i.e. are able to protect the eyes from horizontal sun rays (glare).

4) “Cosmetic” – glasses are more of a stylish accessory than a means of protecting the eyes from the sun’s rays.

5) Regarding the inscriptions and engravings on the bridge, outside temples or directly on the lenses, such marking of sunglasses does not have a standard - usually the names/logos of brands are placed in these places, which should indicate that the product is original. For example, the Ray Ban inscription in the original models is applied only to the left (from the front side) lens in the upper left corner.

6) It happens that deciphering the inscriptions on glasses is not possible, since you do not recognize any of the above standard designations and the inscriptions simply contain a jumbled set of letters/numbers. In most cases, this means that the model in front of you is not original, i.e. fake.

As you can see, knowing what the numbers on sunglasses (and symbols) mean is quite useful. Besides the fact that they can help you choose glasses with the properties you need, they can also warn you against buying low-quality copies.

Instructions

When choosing glasses for sun protection, pay attention to those models in which the lenses are closest to the eyes, but do not touch the eyelashes. With these glasses you will be less bothered by side light.

There are five levels of protection for glasses from light exposure: transparent, light, medium, strong and maximum. As a rule, manufacturers note this indicator in the product certificate. On cheap glasses, the degree of protection is indicated on a sticker placed over the lens. There you can also find a note about ultraviolet protection. You can check the accuracy of the information using special equipment from an ophthalmologist.

Manufacturers produce glasses with different types lenses, both absorbing radiation and reflecting it. Tinted glass filters well visible light, but they offer little protection from ultraviolet waves. It is easy to find glasses with black, brown, yellow, green, blue and pink lenses on sale - it all depends on the fashion of the season and the designer’s imagination. However, when purchasing such an accessory, you must take into account that yellow and brown glasses, although they protect from bright light better than others, significantly distort color rendition and are therefore not suitable. The safest lenses are colored gray or grey.

Regular tinted lenses may be useful in bright light, but will be a nuisance indoors. A universal solution is glasses, known in everyday life as “chameleons”. Their lenses are made with the addition of a special substance that darkens under intense light, so they are able to change transparency depending on external conditions.

Polarized lenses are the optimal solution for athletes and drivers. Thanks to technology developed in 1937, they protect from direct sunlight without compromising color depth and detail. Most famous manufacturer polarized glasses - Polaroid - also produces regular tinted models. Therefore, before purchasing, you need to make sure that you have chosen suitable glasses. To do this, look through them at any LCD display and tilt your head 45 degrees to the left or right. If the image becomes completely dark, the lenses are indeed made using polarizing technology.

In addition to tinting and polarizing lenses, mirror coating is often used. Thanks to the thin reflective layer, the lenses heat up less and better protect the eyes from part of the spectrum. On the other hand, the coating is easily damaged, the lenses become scratched and do not last long.

Sources:

• How to choose sunglasses

Copies of fashionable sunglasses from famous companies are so filled Russian market, that even buying glasses in an expensive boutique cannot be a guarantee that you will purchase a real branded item. Of course, it's a shame to lay out enough a large amount money for counterfeiting. But what is much more dangerous is that fake glasses do not provide necessary protection. But sunglasses First of all, they are needed precisely to protect your eyes from harmful radiation. Fashion and beauty in in this case secondary.

Instructions

Pay attention to the case. Good branded models are sold only in a case. Even a leather case will be tough enough to protect your glasses from deformation and damage. The manufacturer's company branded case should be engraved, not printed. Some companies include a small screwdriver for tightening the frame.

Branded glasses are always supplied with: a booklet, a cloth for cleaning lenses and a passport or certificate.

The real lens cleaning cloth is made of soft microfiber fabric, the edges do not fray, and there is a company logo on the cloth. In addition, the cleaning cloth is packaged in a plastic bag and placed inside the case.

The booklet must be printed on good paper, without spelling errors. Printing ink should not smudge when run over it with a wet finger.

Pay attention to the temples of the glasses. WITH inside there must be an inscription indicating the model number, color designation, and compliance symbol European standard quality (CE), level solar protection. All inscriptions must be even, clear, not