Glasses with good sun protection. Choice of sunglasses

Sunglasses are a fashion accessory that keeps your eyes healthy. But for many, the main word in this definition is “fashionable”, such people do not bother choosing high-quality glasses, they buy according to the principle “to be beautiful”. This is completely wrong! A poor-quality accessory can seriously harm your health.

Why and how it should be right you will learn from this article. Let's find out what Sunglasses better choose.

Where does the danger come from
I think everyone has heard that sunlight is dangerous with ultraviolet radiation. It really is. Ultraviolet radiation (UV) is three types: UV-A ( longwave range), UV-B ( medium wave range), UV–C ( shortwave range). Doctors say that type B radiation is the most harmful. Negative impact ultraviolet is enhanced by reflection sunlight from some surfaces, for example, snow reflects up to 90%, the water surface - up to 70%. In this case, the reflected rays are added to the direct ones.

Failure to protect your eyes from sunlight can lead to very severe consequences. Significant visual impairment as a result of clouding of the crystal, retinal burn, or damage to the cornea of the eye ( photokeratitis). It is because of the real danger of ultraviolet radiation that it is necessary to choose truly high-quality glasses! It doesn't matter how dark the lenses are if they don't have protective properties. In such fakes, the pupils will dilate reflexively due to dimming, thereby letting even more ultraviolet light into the eye.

What sunglasses to choose?

Lens material
lenses sunglasses may be mineral glass) or synthetic ( plastic) origin. There is a misconception that glass lenses are much better, no, this is no longer the case. Modern technologies allow the manufacture of plastic lenses of very high quality. More than 90 percent of sunglasses produced today come with plastic lenses. Use in production various additives and sputtering make it possible to manufacture plastic lenses with unique properties, plus, unlike glass, they are resistant to impacts and do not fog up so much.

Lens color and coating

Lens color	Characteristic
Gray (from light gray to almost black)	In glasses with such lenses, you will perceive the colors of the objects around you as realistically as possible, without color distortion.
Brown	Suitable on a bright sunny day, protect your eyes from glare, provide very good contrast.
Green	delays the largest number ultraviolet, reduces eye fatigue.
Blue (cyan, purple)	HARMFUL! Lenses of such colors stimulate excessive dilation of the pupils, lead to a deterioration in coordination and thinking, can cause a state of lethargy, headache, slight irritability.
Yellow	They help to better perceive space in depth with dim (cloudy weather, twilight) lighting, relieves excessive eye strain. Recommended for drivers.
Orange	Similar to yellow, plus they reduce the effect of blinding from bright headlights at night.
Pink	HARMFUL! "Live in pink glasses» due to color distortion and possible loss orientation, can affect the psyche.
gradient	The lens is colored unevenly - darker at the top and less or not at all at the bottom. Suitable for dim sun, reading in nature. However, in people with not very good eyesight can cause eye strain, so prolonged wear not recommended.
Coating type	Characteristic
Mirror	Darkens even more than just tinted lenses. The color of the mirror coating (silver, gold, blue, iridescent) does not affect the quality of vision. Recommended for recreation in the mountains, on the water, skiing.
Photochromic ("chameleons")	It becomes darker or lighter depending on the brightness of the light. Photochromic lenses with diopters can be chosen by people with poor eyesight who do not want to carry both regular and sunglasses.
polarizing	Do not let in glare - rays reflected from some surfaces (snow, water, glass, metal, etc.). Increase contrast and visual comfort. There may be different color solutions. Suitable for everyone.

frame material
Frames come in a variety of styles, from plastic and stainless steel to titanium and precious metals. Choose according to your taste and financial possibilities. The main thing is to check the quality of the fastening of the temples, they should not hang out or, on the contrary, move apart with effort.

Marking
On labels, labels, stickers and even on the arms of quality glasses, you can read the information you need.

An inscription like "Blocks at least 95% UVB and 70% UVA" ( percentages may be different.) means that these lenses block 95% of UVB rays and 70% of UVA rays.

The marking may indicate the wavelength that the lenses delay, for example 400 nm or "UV-400" - this indicator provides maximum protection against harmful radiation.

The next value is the refractive index, which is denoted as follows: 1.5; 1.6 and so on. Thinner and clearer lenses are indicated by more high coefficient.

Sunglass lenses are divided into five categories (from 0 to 4). Their characteristics are as follows:
«0» - light transmission 80–100%.
"one"- light transmission, respectively, 43–80%.
"2" - 18–43%.
"3"- light transmission 8–18%.
"four"- light transmission 3–8%.
Zero and first are the so-called "image" glasses with minimal UV protection, they can be worn solely for beauty, since they do not carry any benefit. The second provides partial eye protection, suitable for wearing in cities in mid-latitudes. In the third - perfect for a trip to the beach and nature. In the fourth - snow-capped mountains or tropics rich in sun.

Sunglass shape
A mirror or an objective view from the side will help you here ( husband or girlfriend). Stylists are advised to follow some rules when choosing the shape of glasses depending on the shape of the face.

"Square" face - it is necessary to visually make the cheekbones less wide and lower the chin. This requires thin rimmed glasses. metallic) that will sit high on the bridge of the nose, the lenses should be slightly rounded towards the bottom.
"Rectangular" face - the elongation of the shape can be optically corrected with the help of massive glasses in a dark frame with wide bridge of the nose.
"Triangular" face - so that a wide forehead does not contrast strongly with a narrow chin, choose glasses with small, soft lenses oval shape in a thin metal frame.
"Round" face - glasses in a dark frame with lenses will help to visually narrow the face rectangular shape.
“Oval” face - you are lucky, you have a large choice, as glasses of almost any shape will do.

A few tips to help you buy sunglasses
1) No glasses from outdoor tents if you want to keep your eyes healthy. Feel free to go to specialized optics stores, where you can find not very expensive models of decent quality.

2) Having chosen the glasses you like in shape and color, carefully study the markings on labels, stickers and frames. Now, knowing the necessary information, ask the seller about this model. Ask to see the certificate or at least a copy) for glasses.

3) If you like glasses with polarized coating, then in good salons optics for their verification there are special screens. First you look at the screen without glasses, and then with glasses, while the screen should be an image that you have not seen naked eye.

4) Put on the glasses you like and carefully “listen” to yourself - does the bow press on the bridge of the nose, do the ears sit well. Leave a deposit for glasses to the seller and go outside ( preferably in sunny weather), pay attention to how clearly and without distortion you see the surrounding objects, how colors are transmitted, whether excess sunlight from the sides ( that is, are not the lenses small). When testing, do not look at the sun even in the most good glasses.

5) If everything suits you, and you bought glasses, then it is advisable to purchase another case ( or case) and a handkerchief for wiping the lenses. So the glasses will last you much longer.

The summer heat has come, which means that the questions of how to choose sunglasses again confronted us with all their relevance. But first, let's limit the audience of those who will benefit from this article. If you think that sun glasses are, first of all, a fashion accessory, and it’s better to buy them cheaper, somewhere in the subway, you don’t even have to read further. It remains only to sympathize: perhaps you will soon not be able to do this at all.

Sunglasses - men's or women's, it doesn't matter - this is, first of all, protection from ultraviolet radiation. So, the lenses in them must be of high quality and reliable. Otherwise, this is what happens: our pupils, deceptively believing that the darkened plastic will protect them from the sun, do not have time to narrow, and as a result receive a sufficient dose of radiation. This is fraught with damage to the retina and other troubles, up to complete blindness!

Remember this before. And then, already with knowledge of the matter, proceed to the choice of two aspects: technical and aesthetic.

The first step in the process of getting out of the sun is choosing between glass and plastic lenses. The former are guaranteed to provide a high degree of UV protection. They are more durable, scratch less and look expensive and stylish. Unless, of course, you carry them in a bag with keys and periodically drop them on the pavement. Plastic glasses are thinner and much lighter, do not cause discomfort and heaviness. Modern technologies make it possible to give plastic strength and scratch resistance. By the way, plastic glasses do not break, and they are most often purchased by children - in order to avoid injuries.

How dark is it? It depends on where you are going to wear them. If you plan to spend the summer in the city, then you can buy glasses with a slight level of dimming. But a trip to the south, with lying on the beach and the glare of the sun reflecting off the surface of the water, suggests more sunglasses. They can even be mirrored or with a special anti-reflective coating. Today there are also chameleon glasses that change the degree of dimming depending on the room in which you are. This is truly a one-stop solution for any occasion.

After you have learned how to choose sunglasses, taking into account the material and the level of shading, you should pay attention to the color of the lenses themselves. Shades of brown, gray and green are considered optimal. But aggressive reds and oranges are best left lying on the counter. This, of course, is catchy and original, but you definitely don’t go through them all day. Moreover, such bright colors negatively affect the human psyche.

Pay attention to the size of the new glasses. Experts say: the larger the glasses themselves, the higher their degree and, accordingly, the better. However, glasses in which their owner resembles a dragonfly or an alien are not for everyone. Especially if they have a fairly wide frame. On the one hand, this is very good: it protects the thin skin around the eyes from wrinkles caused by squinting. On the other hand, you will look like you are hiding from the police or you have been hit in the eye. One of possible solutions- choose large glasses, but in a very thin frame or without it at all.

How to choose sunglasses? Now you know the answer to this question!

Many people believe that sunglasses are just a fashion accessory. But they are primarily designed to protect the eyes. The question of how to choose sunglasses must be approached with responsibility, since the accessory Low quality can harm rather than benefit.

What is sunlight and how can it damage your eyes?

So, if you are wondering how to choose the right sunglasses, you should first understand why you need to protect your eyes from the sun. Melanin provides natural protection to the eyes, but with age, its amount decreases, so exposure to sunlight can provoke the appearance of such eye diseases like a cataract or central degeneration. Even a short observation solar eclipse without proper eye protection can lead to reduced vision with the possibility of only partial recovery.

Sunlight is predominantly a combination of infrared and ultraviolet radiation. Ultraviolet radiation, depending on the wavelength, is divided into:

longwave (A) - the safest range; it is the rays of this type that cause a tan, but it should be noted that the effect accumulates throughout life and accelerates skin aging;
medium wave (B) - the rays of this range have more high energy; their presence in a certain amount causes burns, dermatitis and other skin damage;
shortwave (C) - the most dangerous range, which, however, almost completely traps the ozone layer of the atmosphere.

Ultraviolet radiation is different at different latitudes. So, in the region of the equator, it is very intense, and as you move away from it, the intensity of the radiation decreases.

Among other things, when reflected from certain surfaces, the influence of UV rays is enhanced, which increases the total radiation dose. So, water reflects about 70% of sunlight, snow almost 90%, and grass only 3%.

If we talk about infrared radiation, then it is largely scattered due to the moisture contained in the atmosphere, but in combination with ultraviolet radiation, it can also be dangerous.

What to look for when buying glasses

If you are interested in choosing good sunglasses, the first thing you should ask the seller is the material from which the lenses are made and its quality.

Lenses made from high-quality polymer materials such as polycarbonate are capable of blocking UV-A and B-rays. Glass does significantly but not completely block UV radiation. Both glass and plastic transmit infrared rays.

Many people believe that the darker the color of the lenses, the better they protect the eyes. In fact, the intensity of lens staining does not always indicate the ability to delay Sun rays.

So, if the lenses are colored dark, but do not have protective properties, the dose of ultraviolet radiation affects the eyes even worse than the rays received through a transparent lens. After all, pupils dilate behind dark lenses. Accordingly, a person who wears glasses that transmit ultra-violet rays, increases the load on the eyes, which can adversely affect vision over time and even cause clouding of the lens.

In the store, you should immediately check whether the accessory you like meets the requirements of safety and quality standards. On high-quality glasses, there is always a special marking. And the level of protection should be indicated in the insert attached to the glasses. It also contains information about the manufacturer, the conditions in which the product is recommended for use (city, water surface, mountains), a note on caring for it, as well as an indication of the category of lenses in the range 0-4.

"0" - lenses that transmit the sun's rays by 80-100%. They provide only minimal UV protection.
"1", "2" - lenses with light transmission of 43-80% and 18-43%, respectively. Glasses with such lenses are recommended for use in urban environments.
"3" - such lenses transmit the rays of the sun by 8-18%. Glasses of this type are a suitable option for going out into nature or beach holiday.
"4" - lenses with light transmission 3-8%. This filter is designed for hot countries and highlands. Please note that Category 4 glasses cannot be used while driving.

Polarized and photochromic lenses

If you can't decide between polarized and photochromic lenses, further information will be useful for you and will surely help you make a choice.

Polarized lenses do not let in the reflection of light from water, snow, ice, wet asphalt, which provokes a deterioration in visibility. By cutting off the "flare", such an accessory provides a clear and comfortable vision. They recommend glasses with such lenses to motorists, patients who have undergone retinal surgery, the elderly, people with photophobia, as well as vacationers near the water.

Also, polarized lenses will become very good choice for people who drive at night. They help the eyes adapt to changes in the brightness of the light, and also significantly reduce discomfort during the transition from conditions bright lighting in twilight and darkness.

Photochromic lenses change the amount of light transmitted depending on the intensity of UV radiation. These lenses are used in chameleon glasses that darken in bright sunlight and brighten in its absence.

Also on sale you can find glasses with lenses that combine photochromic and polarizing properties.

When choosing glasses with photochromic lenses, it is necessary to take into account the speed of lightening and darkening of the lenses, as well as their temperature sensitivity. By the way, the substances that are used to produce such lenses are more active when low temperatures. Accordingly, in hot weather, photochromic glasses darken less, and therefore protect the eyes worse. Also, over time, these agents in lenses can wear out, causing the tint to fade. For this reason, glasses of this type must be replaced regularly.

Convenience

In addition to tips related to the latest fashion trends, there are some very important points one of these is convenience.

In correctly selected glasses, the load of the temple should be distributed only to the area behind the ear and above the ear. Whiskey exposure is not allowed.
The load on the lens frame should only be nasal bone but not on the cheek. If the glasses are chosen correctly, the nose pads lie exactly on the nasal bone and follow its contours.
If the glasses are initially tight, you should not buy them in the hope that they will “bear”. The frame is actually slightly deformed, but this does not mean that it will become comfortable.
When turning and tilting the head, the glasses should not fall off.

Choice of glasses according to the shape of the face

A well-chosen accessory will help to correct the shape of the face and some of its shortcomings.

Owners of a triangular face shape to balance it lower part glasses with a thin frame will help. It is worth abandoning bright frames with large elements. Such glasses should not be worn high on the bridge of the nose, the line of the eyebrows should be clearly visible.

Holders of a rectangular or elongated face shape fit glasses that cover its central part, with a frame stretched wide.

People with square face fit glasses in the form of a trapezoid expanding upwards. They need to be worn high on the bridge of the nose.

Advice! If you are the owner or possessor round shape faces - look for frames with straight or angular lines. Glasses of deep colors will help to correct the roundness of the face. Glasses in the form of a trapezoid expanding upwards are also welcome.

The oval face shape is universal. Therefore, glasses of any shape are suitable for her, subject to the proportions of the frame and lenses to the size of her face.

If you want to emphasize your nose, you should wear glasses high on the bridge of your nose. If you need to hide the length of the nose, the frame is located in the middle of it.

If you have eye diseases or vision problems, you should consult an ophthalmologist about the choice of glasses.
Spectacles must be clearly labeled and sold with inserts. The label must indicate the amount of ultraviolet rays transmitted by the lenses, the ability to remove glare and adapt to the brightness of the light.
For car drivers, experts recommend buying glasses with photochromic lenses. If you like to relax in the snowy mountains, give preference to glasses with polarized lenses.
It is best to buy glasses with large lenses protecting the eyes and the skin around them from the sun. From glasses of small size, poorly covering the eyes, there is little use.
The most comfortable eyes feel in glasses with lenses of gray, gray-green, gray-brown color. Eyes quickly get tired of orange, pink, blue and yellow lenses.

Before the final choice, ask the optics store to check the light transmission of the selected model and the degree of UV protection on a special apparatus. You should not buy glasses that have recently come into fashion and are unlikely to remain fashionable for a long time, because high-quality glasses are an accessory that can serve you for more than one year.

Stylish images of girls in sunglasses

Note:

The eyes are the most revealing, and in a sense, the most intimate part of our body.

Thanks to this, even shy and insecure ladies allow themselves to sunbathe naked to the waist.

And most importantly, the glasses give a sense of anonymity, incognito, and hence the feeling of peace and confidence: we rarely have complexes when we are alone. Figuratively speaking, a man in sunglasses sees more than he can see.

These mirrors of the soul give us away first of all.

Therefore, we always want to hide them deeper.

It is much easier for us to cope with facial expressions and gestures, it is easier to keep the conversation on a certain note, but it is much more difficult to control our eyes.

And nothing hides your eyes like sunglasses.

Psychologists are sure that they have a double sexual effect.

Firstly, the woman herself feels more "sexy" in glasses.
Secondly, this feeling is also transmitted to a man: a sexy lady seems to him more attractive.

So that sunglasses very sexy attribute of our appearance.

Men's sunglasses are just as important!

Now let's look at the man with the dark glasses.

According to established stereotypes, often originating from cinematic clichés, man in sunglasses looks a bit brutal sometimes even ominously. Some threat emanates from him - his actions are unpredictable. We do not see his eyes, and therefore do not know what to expect from him.

In a word, sunglasses help get rid of inhibitions and make a certain impression. And you need to use them in cases where you need to overcome a certain barrier. They will help when meeting a girl (boy), on a first date, in any conflict situation when you need to show yourself cooler than you are.

However, you need to keep in mind that there are situations in which dark glasses seem to be illegal. This happens in cases where it is customary to play openly, for example, during negotiations.

Let's find out what is the first thing you need to be guided by when choosing.

How to choose the right sunglasses?

To protect your eyes from harmful effects ultraviolet rays and give the face a more perfect shape, a woman needs sunglasses. An ophthalmologist, consultant of the Moscow medical center"Optical" Svetlana Grigoryevna Ershova.

It is important!

Our eyes are very sensitive to various external stimuli.

Perhaps the most important of them are ultraviolet rays, the activity of which increases significantly in spring and is even more intense in summer. Their constant impact on the cornea of the eyes can provoke a general deterioration in vision and even the appearance of early cataracts.

To prevent this from happening to your eyes, make it a rule: in spring and summer, on sunny days, when going out or driving a car, always wear sunglasses. Good pick up suitable optics with dark glasses, including diopters, is not a problem now.

Choosing the right lenses is key

The main thing in sunglasses is not the frame, as some women believe, but the lenses. They must be glass.

If the lenses are made of plastic, they may deform when exposed to high temperature and any image through such lenses will be perceived distorted.

Pay attention to the color of the lenses - most often brown, less often - gray or green. The darker the shade of any of these colors, the more light the lenses can absorb.

Take a good look at the inside of the temples of the glasses. The designations that you find on one of them will tell you what color the lenses are and what percentage of light they absorb.

So, “B-15” are brown (from English brown) lenses that transmit 15% and block 85% of the light; "G-20" - gray (from English gray) or green (from green) lenses that transmit 20% and block 80% of the light. It is desirable to choose glasses with a lower number, for example "B-15" or "G-15", and not "B-20" or "G-20". So you can protect your eyes from ultraviolet rays as much as possible.

If you are going to spend a vacation at sea or in the mountains in spring or summer, choose special, multifunctional glasses that protect your eyes well from the sun in any conditions. The lenses of such glasses can be of any color, but they must have a mirror coating. It very effectively reflects especially bright, sometimes just blinding sunlight from sea water or on the snowy mountains. Glasses with "mirror" lenses can be worn in the city, even if the sun is not so bright. It won't hurt your eyes.

But if you are an avid motorist, mirrored glasses are especially suitable for you. During the day, they will reflect the sun that hits the eyes through the windshield, and at night, the blinding headlights of oncoming cars. In addition, pay attention to special glasses for motorists, the polarizing lenses of which not only protect the eyes from the sun and headlights, but also enhance the visual perception of the main "road" colors - red, yellow, green.

A tag attached to one of the temples should indicate that these are specifically glasses for motorists. The color of their lenses should not confuse you - it can be anything. The polarizers included in lens glass do not affect their color in any way.

What are Chameleon Glasses

Apart from all the variety of lenses for sunglasses are photochromic - with silver - lenses, which in everyday life are commonly called "chameleons". They are famous for the most gentle protection of the eyes from light, as they darken gradually, as its brightness increases. The load on the eyes in this case is reduced, because they are protected exactly as much as required in this moment. That is why glasses with "chameleon" lenses can be worn all day long without taking them off.

If you are nearsighted or farsighted, try to pick up glasses with diopters, in the frame of which photochromic lenses are inserted - “chameleons”. They will make you feel comfortable both indoors and outdoors. If for some reason you do not like them, get sunglasses with simple dark lenses, but with diopters.

Finding one is not a problem now. This requires a prescription for eyeglasses from an eye doctor and a good optical store that not only sells finished products, but also accept orders for the manufacture of glasses. Including extraordinary: for example, sunscreen, with glasses with different diopters.

How to evaluate quality

No matter how good the store is, it is up to you to finally evaluate the quality of sunglasses. Therefore, first of all, pay attention to their price.

Branded quality glasses with good lenses and bezels can't cost less than 50 dollars. Tempted by cheapness, you run the risk of buying glasses that are harmful to the eyes, the lenses of which only darken the image, but do not block the access of ultraviolet rays.

The high quality of the glasses is evidenced by the inscription on inside one of the arms - "UV-PROTECTION" (translated from English - "UV protection").

Try on glasses!

If they do not distort colors and images, the quality is obvious.

Good photochromic lenses - "chameleons" - should have a uniform darkening, which is easy to check in the sun, while bad lenses darken in turns, or spots. Under artificial lighting, for example, good "chameleon" lenses do not darken at all, while bad ones will change color even under a table lamp.

In addition, the quality of glasses can be assessed by the frame. A decent plastic or metal frame should hold the lenses well and not have any burrs or burrs, be heavy enough and not bent. The temples of such frames move freely and are securely attached to the glasses - most often with the help of invisible, soldered hinges, similar to door hinges, which do not loosen during operation and do not fall out. Poor frames of cheap glasses are usually very light and not quite smooth.

The arms are always attached to them with screws, which fall out every time if they are not tightened in time. Usually these glasses are enough for one spring-summer season, while high-quality glasses serve faithfully for several years. To prolong their life, always keep your glasses in a hard case and never place them on a hard surface with the glasses facing down. If necessary, wipe the lenses with a special dry velvet cloth made of soft suede.

When the frame suits you

Even the most expensive sunglasses will look bad on you if you pick them up in passing, without taking into account the features of your face. Meanwhile, they can emphasize the attractive sides of the face and correct its shortcomings.

So, if you are chubby, pay attention to the glasses of a rectangular shape, without rounded details, with a frame of a very dark color. Your face will look narrower in them.
Square face gains more correct form, if you optically reduce the width of the cheekbones and lower the chin. To achieve this effect, glasses sitting high on the bridge of the nose, slightly rounded downwards, in a thin metal frame, will help you.
A rectangular face is characterized by some elongation, which can be reduced by wearing massive glasses with a wide bridge on the bridge of the nose, framed in black or dark brown.
If you have a triangular face, pick up glasses that sit low on the bridge of your nose in a thin metal oval frame, with small lenses in soft colors. In them, a too wide forehead and a narrow chin will look more balanced.
Almost any sunglasses will fit the face of the most correct - oval - shape.

It often happens that glasses, while giving the face a more attractive shape, cannot hide the imperfections of the nose. In this case, you will need to make several fittings. Be aware that too a long nose spectacle frames with upturned edges and a double bridge on the bridge of the nose can shorten.

A large nose will be slightly reduced by a large frame, which strongly goes over the cheekbones. small nose will not seem like a button in a light frame with a curved bridge on the bridge of the nose. By taking the time to choose sunglasses, you will become even more attractive and protect your eyes from ultraviolet rays.

source: http://www.medpulse.ru/health/sight/prophylaxis/4239.html

Why the sun hurts our eyes

The natural protection of the eye is provided by the pigment melanin, the amount of which in the eyes decreases with age. Therefore, intense exposure of the eyes to solar radiation can lead to problems and cause eye diseases such as central degeneration or cataracts.

For example, even a short-term observation of a solar eclipse without appropriate eye protection led to a decrease in people's vision, which subsequently recovered only partially.

What to consider when choosing glasses

The choice of sunglasses in stores is so wide that it can be very difficult to sort through them. To do right choice, you need to understand where and how you are going to use your sunglasses.

quality glasses not only protect the eyes, but also provide comfort and image clarity. Ideally, sunglasses should change the brightness of the image, but not change the color rendering.

Material

Lenses made of high-quality polymer materials, such as polycarbonate, block ultraviolet rays of types A and B. Glass also significantly blocks ultraviolet light, but not completely.

But infrared radiation, which is just as undesirable to the eye, passes through both plastic and glass.

light and color

It would seem that the darker the glasses, the better they should protect the eyes. But intensely colored lenses are far from always capable of retaining solar radiation. If the lenses are simply colored and do not have UV protection properties, the UV dose is even greater than that received through a clear lens. After all, the pupils behind the dark lenses expand.

Attention!

Poor quality sunglasses contribute to more severe damage eyes with ultraviolet light. This is especially true for children and adolescents, since they are more likely to be outside during the day than adults.

A good addition to sunglasses is a visor or cap. They block about half of the sun's rays.

Radiation protection

Quality sunglasses have special markings to help you make the right choice depending on your needs. The level of protection is indicated in the inserts attached to the glasses.

They also contain information about the conditions in which the glasses are recommended for use (mountains, water surface, city, etc.).

"0" - light transmission 80-100 percent. Minimal UV protection of all kinds.
"1", "2" - light transmission, respectively, 43-80 percent and 18-43 percent. Such glasses are recommended for use in urban environments, since they provide only partial protection from ultraviolet radiation.
"3" - light transmission 8-18 percent. This type of glasses can be chosen for ordinary beach holidays and outings.
"4" - light transmission 3-8 percent. This is a very dark filter designed for highlands and hot countries.

Polarized lenses

Polarizing filters do not allow intense reflection of light from surfaces (wet asphalt, snow, ice, water) to the eyes, leading to poor visibility. By cutting off the harmful part of the "flare", they provide a more comfortable and clear vision.

Photochromic lenses

Photochromic lenses are able to react to ultraviolet radiation by changing the amount of light transmitted.

They are used in the so-called chameleon glasses, which darken in the sun, and in the absence of sunlight, their lenses become transparent. There are sun lenses that combine both polarizing and photochromic properties.

When choosing sunglasses with photochromic lenses, consider the fade rate and lightening rate, as well as temperature sensitivity.

By the way, photochromic agents - special substances used in the production of such lenses - are more active at low temperatures. That is, in the heat, the dimming of photochromic lenses is less, and the eyes are protected by them worse.

Over time, the photochromic agents in lenses can "wear out" and the lens tint fades. Therefore, such glasses must be replaced regularly with new ones.

How to choose the right glasses?

Decide in advance what you need sunglasses for.
If you have vision problems or eye diseases, be sure to consult an ophthalmologist before choosing sunglasses.
Do not buy sunglasses at stalls and markets. Quality glasses don't have to be expensive. Choose from those that are sold in stores, such as travel stores, and come with clear labels and inserts.
Carefully study the marking of glasses - it indicates how much ultraviolet rays the lenses of the glasses pass through, whether they are able to adapt to the brightness of the light or remove glare.
If you drive a car or often leave the room in the sun and back - get glasses with photochromic lenses. For a holiday in the snowy mountains, it is better to purchase glasses with polarized lenses.

In the hot summer season, it is important to protect your eyes to protect your eyesight and avoid wrinkles around the eyes, because daily exposure to the sun poses a serious risk to our eyes. How to do it?
Before you buy sunglasses, visit an optometrist. If you have poor eyesight, it will help you choose the right prescription sunglasses. You need to choose only high-quality sunglasses! There are glasses of famous brands - FISCHER, DUNLOP, KANGOL, CHIARA BONI, EXENZA, NAFTA, ENIGMA, MIRAGE, ZAGATO, MISTERO, VIOLA, VALENTE. Branded glasses are stable and durable. They serve up to ten years. And cheap fakes fade in one season. Under the hot sun, a bad lens can deform and fall out of the frame.

quality, stylish glasses adorn the people who wear them. They merge with your face, harmonize with clothes and jewelry. With the help of sunglasses, you can not only save your eyes, but also add charm and attractiveness to yourself. When choosing them, so that the purchase is made with taste, first of all, you should consider the contours of the face, the shape of the eyes, and the length of the hair, and even their color. Of the secondary components of a successful choice - blondes go with light or plain frames, and colored and bright ones for brunettes.

Sunglasses should perform not only decorative, but also protective function. Modern, sleek design of sunglasses should be combined with good UV protection, categorized from 0 to 4, depending on how much visible light the sunglasses let through.

Category 0 sunglasses transmit 80-100%, category 1 43-80%, category 2 18-43%, category 3 8-18%, and category 4 3-8% of visible light.

Currently, sunglasses are produced with various coatings: anti-reflective, photochromic, hardened, water-repellent, etc.

The demand for sunglasses and, accordingly, their purpose is determined by three components:
Firstly, providing visual comfort in sunny weather: sunglasses reduce the amount of visible light to a comfortable level (“the sun does not blind”). At the same time, as much as possible, the usefulness of color rendering and contrast sensitivity, clarity of vision and optical distortions should be preserved.
Secondly, safety: sunglasses must completely absorb the ultraviolet (invisible) component of the spectrum of natural sunlight, which can harm the eyes (sun-dependent diseases).
Thirdly, it is a fashion accessory and a significant element of the image. Sunglasses have now become a truly fashionable accessory. They should not just attract attention, but amaze and delight others with their shape, color and, of course, rich finishes.

You can buy glasses that are not too expensive, but you should consider:
This year, transparent glasses will remain relevant and, as an opposite, glasses with a mirror coating. If you like colored glasses, keep in mind that the violation of the usual colors in the direction of a single color noticeably scatters attention, and a person wearing colored glasses gets tired faster.
The amount of visible light passing through the lens depends on the density of the filter. The density depends not only on the "darkness" of the glasses, but also on the color of the lenses. In urban areas, it is enough to have sunglasses with a density from light to medium, on the beach, in the sea or for the highlands, a dark filter is needed.

In general, gray or green lenses do not distort colors, and they can be worn everywhere. golden yellow blocks Blue colour so they are worn cloudy days. Mirrored reflect light, so they are worn at high altitudes in the mountains or by the sea. Plastic glasses can only be bought with special additives that block ultraviolet radiation.

What material are sunglasses lenses made of? From an optical point of view, best material can be considered mineral glass. His protective properties maximum, and objects are not distorted.
plastic glasses Acrylic coating protects against UV, but is easily scratched. It is better to choose more expensive glasses - made of nylon or polycarbonate. These are most often found in sports series.
There are three main groups of sunglasses: cosmetic, regular sunglasses and very high protection glasses.
cosmetic glasses, which is clear from the name, perform a cosmetic function and are a stylish accessory. But they won't protect you from strong sun. That is, these are sunglasses that meet the requirements middle lane. High protection goggles necessary primarily for the highlands, the Arctic, regions with ozone anomalies, both in summer and in winter.
There is another type of glasses with lenses coated with a special absorber CR-39. Very practical material long term services. It is impossible to scrape it off, as it is included in the material at the molecular level.

How to choose sunglasses for those who have poor eyesight And who already wears glasses with diopters?
The first - and main - advice: if your vision does not pull on "one" and you already wear glasses (nearsightedness, farsightedness, astigmatism) or even more so contact lenses, then before putting on sunglasses, go first to the optometrist, and only then order and buy glasses from the sun with diopters. Otherwise, you can only worsen your vision.

Which glasses are better - with glass or plastic lenses?
Both of them have their own advantages and disadvantages.
Glass, unlike plastic, do not transmit ultraviolet rays (even if they are not darkened - this is a property of quartz, which is part of the glass). Glass lenses are not easily scratched. But they will break, falling to the floor and even more so to the asphalt. Even worse, if you yourself fall face down or someone hits you - fragments broken glass With high probability may get into your eyes. By the way, it is for this reason that in some Western countries It is forbidden to insert glass lenses into children's glasses.
Plastic lenses do not break - they can only be broken, but they are easily scratched, cloudy, etc. In addition, not all manufacturers bother to use a special technology that allows plastic to also not let in ultraviolet radiation.

How to check the quality of the frame when buying?
Many people choose sunglasses based on the attractiveness or originality of the frame. The frame should not be too hard, and even more so with sharp corners, burrs, etc.
Check the fastenings - whether the screws are tightly tightened. And, of course, try on glasses: they should easily lie on the bridge of your nose, and the temples should not press the skin too hard. Glasses (especially with plastic lenses) must be light.

Who are the frames for?
Blondes fit frames made of (under) gold, silver, titanium alloy. Fair-haired and red - under bronze, gold, copper or "under a turtle".
For brown-haired women and brunettes - frames of all shades of red and brown. Burning brunettes - black or gold.
Platinum blondes and gray-haired - from silver, platinum, titanium.
The general rule for choosing sunglasses is the more the better. The most correct choice is glasses that make their owner look like a dragonfly. It is desirable that the glasses have wide temples that cover the eyes on the sides.

How to check that the glasses are branded?
Firms that value their reputation necessarily duplicate the name ( trademark) on the inside of the temple of glasses, and often directly on the lenses. Remember that self-adhesive labels like to use counterfeiters.

Tips for buying sunglasses:
Do not be stingy and buy a case for glasses, or even better - a case.
White eyeglass frames are almost always in fashion, keep this in mind when choosing sunglasses.
Always place your goggles on a hard surface with the lenses facing up, so you are less likely to scratch them. Do not leave glasses on armchairs, sofas, chairs - someone will definitely sit on them.
It is best to wipe the glasses from dust with thin suede or a clean, slightly fleecy cloth.
With a round face, it is better to choose a bright frame that distracts attention from the shape of the face.
Glasses should not let in more than 50% of the light. It used to be that it was better to buy glasses with glasses. Plastic was treated with caution because it was unevenly colored, and this also spoiled vision. But now the level of plastics production is so high that this problem practically does not exist.
If you are going to buy glasses on the market, then keep in mind that these multi-colored things can best case complement the outfit, but will not protect from the sun. The pupil, covered with such lenses and deceived by the absence of direct solar irritation, instead of showing a natural reaction to the sun - constriction, on the contrary, expands and receives all types of radiation according to full program. You should not hope for the compliance of the materials from which such glasses are made with environmental standards. A nickel frame often causes skin irritation for many.
Those who relax on the beach do not take off their sunglasses even in the sea - after all, the eyes are especially affected by glare on the water.
Good sunglasses are by no means cheap, however, you can spend a lot of money on dark glasses, the quality of which is not at all guaranteed.