Glasses with good sun protection. Choosing 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 quality glasses, they buy according to the principle “to make them look beautiful.” This is completely wrong! A low-quality accessory can seriously harm your health.

Why this is so and how it should be correct you will learn from this article. Let's figure out what Sunglasses better to choose.

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

Failure to protect your eyes from sunlight can result in very severe consequences. Significant deterioration of vision as a result of clouding of the crystalline lens, retinal burn or damage to the cornea of ​​the eye ( photokeratitis). It is precisely 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 reflexively dilate due to the darkening, thereby letting even more ultraviolet radiation into the eye.

Which sunglasses should you choose?

Lens material
Lenses sunglasses may be mineral ( glass) or synthetic ( plastic) origin. There is a misconception that glass lenses are much better, but this is no longer true. Modern technologies allow us to produce 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 produce plastic lenses with unique properties, plus, unlike glass, they are shock-resistant and don’t fog up as 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 for a bright sunny day, they will protect your eyes from glare and provide very good contrast.
Green	Delays greatest number ultraviolet radiation, reduces eye fatigue.
Blue (light blue, purple)	HARMFUL! Lenses of such colors stimulate excessive dilation of the pupils, lead to deterioration of coordination and thinking, and can cause a state of lethargy, headache, mild irritability.
Yellow	They help to better perceive space in depth in dim (cloudy weather, twilight) lighting, and relieve excess tension from the eyes. Recommended for drivers.
Orange	Similar to yellow ones, plus they reduce the glare effect 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 unevenly colored - darker at the top and less or not at all at the bottom. Suitable for dim sun, reading outdoors. However, people with not very good eyesight may cause eye fatigue, so long wearing not recommended.
Coverage type	Characteristic
Mirror	It darkens even more than just painted lenses. The color of the mirror coating (silver, gold, blue, rainbow) does not affect the quality of vision. Recommended for recreation in the mountains, on the water, and skiing.
Photochromic (“chameleons”)	Depending on the brightness of the light, it becomes darker or lighter. Photochromic lenses with diopters can be chosen by people with poor vision who do not want to carry both regular glasses and sunglasses.
Polarization	Does not transmit glare - rays reflected from certain surfaces (snow, water, glass, metal, etc.). Increases contrast and visual comfort. There may be different colors. Suitable for everyone.

Frame material
Frames come in a wide variety - from plastic and stainless steel, to titanium and precious metals. Choose according to your taste and financial capabilities. The main thing is to check the quality of fastening of the arms; they should not dangle or, on the contrary, move apart with force.

Marking
You can read the information you need on tags, labels, stickers, and even on the temples of quality glasses.

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 block, for example 400 nm or “UV-400” - this indicator provides maximum protection from harmful radiation.

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

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

Sunglasses Shape
A mirror or an objective view from the outside will help you here ( husband or girlfriend). Stylists advise following certain rules when choosing the shape of glasses depending on the shape of your face.

• “Square” face - it is necessary to visually make the cheekbones less wide and lower the chin. To do this you need glasses with thin frames ( metal), which 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 dark frames with wide bridge of the nose.
• “Triangular” face – so that a wide forehead does not contrast too much with a narrow chin, choose glasses with small, dim lenses oval shape in a thin metal frame.
• “Round” face - glasses with dark frames and lenses will help to visually narrow the face rectangular shape.
• “Oval” face - you’re lucky, you have a lot of choice, since glasses of almost any shape will suit.

Some tips to help when buying sunglasses
1) No street glasses 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 shape and color of the glasses you like, carefully study the markings on the 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 good salons optics have special screens to check them. First you look at the screen without glasses, and then with glasses, while there should be an image on the screen that you did not see naked eye.

4) Put on the glasses you like and carefully “listen” to yourself - whether the arch is pressing on the bridge of your nose, whether the ears fit well. Leave a deposit for the glasses with 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 there is excess sunlight coming from the sides ( that is, aren't the lenses small?). When testing, do not look at the sun even in the most good glasses.

5) If you are satisfied with everything and you bought glasses, then it is advisable to purchase another case ( or case) and a handkerchief for wiping lenses. This way your glasses will last you much longer.

The summer heat has arrived, which means that questions about how to choose sunglasses have once again confronted us with all their relevance. But first, let’s limit the audience to those who will find this article useful. If you think that sunglasses are, first of all, a fashion accessory, and it’s better to buy them cheaper, somewhere in a subway passage, you don’t even need to read further. All that remains is to sympathize: perhaps soon you will 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. This means that the lenses in them must be of high quality and reliable. Otherwise, this is what happens: our pupils, deceptively believing that darkened plastic will protect them from the sun, do not have time to contract, and as a result they receive a sufficient dose of radiation. This is fraught with damage to the retina and other troubles, even complete blindness!

Before that, remember this. And then, with knowledge of the matter, proceed to make a choice based on two aspects: technical and aesthetic.

The first step in the sun protection process is choosing between glass and plastic lenses. The former are guaranteed to provide a high degree of protection against ultraviolet radiation. They are more durable, scratch less and look expensive and stylish. Unless, of course, you carry them in a bag with your keys and periodically drop them on the asphalt. Plastic glasses are thinner and much lighter, they do not cause discomfort or 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 for children to avoid injury.

By degree of darkness? 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 low level of darkening. But a trip to the south, with lying on the beach and the glare of the sun reflecting from 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 darkness depending on the room in which you are. This is truly a universal solution for any occasion.

Once you have learned how to choose sunglasses based on the material and level of darkness, 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 is, of course, catchy and original, but you definitely won’t wear them all day. Moreover, such bright colors negatively affect the human psyche.

We also 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 a black eye. One of possible solutions- choose large glasses, but with very thin frames or without them 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 responsibly, since the accessory Low quality may cause harm rather than benefit.

What is sunlight and how can it harm your eyes?

So, if you are interested in 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 trigger the occurrence of such eye diseases like cataracts or central degeneration. Even a short observation solar eclipse without the necessary eye protection can lead to decreased vision with the possibility of only partial recovery.

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

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

Ultraviolet radiation differs 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 increases, which increases the total radiation dose. Thus, water reflects about 70% of sunlight, snow - almost 90%, and grass only 3%.

If we talk about infrared radiation, it is largely dissipated due to the moisture contained in the atmosphere, but in combination with ultraviolet it can also pose a danger.

What to look for when buying glasses

If you are interested in choosing good sunglasses, the first thing you should ask the seller about 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 rays of types A and B. Glass significantly, but not completely, blocks ultraviolet radiation. Both glass and plastic transmit infrared rays.

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

So, if the lenses are dark-colored but do not have protective properties, the dose of ultraviolet radiation affects the eyes even worse than the rays received through a clear lens. After all, behind dark lenses, the pupils dilate. Accordingly, a person who wears glasses that allow ultra-violet rays, increases eye strain, which can negatively 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. High-quality glasses must have special markings. And the level of protection should be indicated in the insert included with 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 about its care, as well as an indication of the lens category in the range 0-4.

• “0” - lenses that transmit sunlight by 80-100%. They provide only minimal protection from ultraviolet radiation.
• “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 sun’s rays by 8-18%. Glasses of this type are a suitable option for outdoor activities or beach holiday.
• “4” - lenses with light transmission of 3-8%. This filter is designed for hot countries and high mountains. Please note that category 4 glasses cannot be used when driving a car.

Polarized and photochromic lenses

If you can't decide between polarizing and photochromic lenses, further information will be useful to you and will certainly help you make a choice.

Polarized lenses block the reflection of light from water, snow, ice, and wet asphalt, which causes poor visibility. By cutting off glare, this accessory provides clear and comfortable vision. Glasses with such lenses are recommended for car enthusiasts, patients who have undergone retinal surgery, elderly people, people with photophobia, as well as vacationers near the water.

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

You can also find glasses with lenses that combine photochromic and polarizing properties.

When choosing glasses with photochromic lenses, you must 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, which means they protect the eyes less well. Additionally, over time, these agents in the lenses can wear out, causing the darkness 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 also some very important points, one of these is convenience.

1. In properly selected glasses, the load of the temple should be distributed only to the area behind the ear and above the ear. Exposure to whiskey is not allowed.
2. The load on the lens frame should only be on nasal bone, but not on the cheek. If the glasses are chosen correctly, the nose pads fit exactly to the nasal bone and follow its contours.
3. If the glasses are initially too tight, you shouldn’t buy them in the hope that they will “break out.” The frame will actually warp slightly, but that doesn't mean it will be comfortable.
4. When you turn or tilt your head, the glasses should not fall off.

Choosing glasses according to your face shape

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

For those with a triangular face shape, balance it bottom part Thin frame glasses will help. You should avoid bright frames with large elements. Such glasses should not be worn high on the bridge of the nose; the eyebrow line should be clearly visible.

For those with a rectangular or elongated face shape, glasses that cover the central part of the face, with frames stretched wide, are suitable.

People with square face glasses in the shape of a trapezoid widening at the top are suitable. They should be worn high on the bridge of the nose.

Advice! If you are the owner or holder round shape faces - take a closer look at frames with straight or angular lines. Glasses of deep colors will help correct the roundness of the face. Glasses in the shape of a trapezoid expanding upward are also welcome.

The oval face shape is universal. Therefore, glasses of any shape are suitable for her, provided that the proportions of the frames and lenses are respected to the size of the face.

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

1. If you have eye diseases or vision problems, you should consult an ophthalmologist about choosing glasses.
2. Glasses must be clearly labeled and sold with inserts. The marking must indicate the amount of ultraviolet rays transmitted by the lenses, the ability to remove glare and adapt to the brightness of the light.
3. For car drivers, experts recommend buying glasses with photochromic lenses. If you like to relax in the snow-capped mountains, give preference to glasses with polarized lenses.
4. It is best to buy glasses from large lenses, protecting the eyes and skin around them from the sun. Small glasses that do not cover your eyes well are of little use.
5. The eyes feel most comfortable in glasses with lenses of gray, gray-green, gray-brown color. Eyes quickly get tired of orange, pink, blue and yellow lenses.

Before making your final choice, ask the optical store to check the light transmission of the selected model and the degree of ultraviolet protection using a special device. You should not buy glasses that have recently become fashionable and are unlikely to remain fashionable for a long time, because high-quality glasses are an accessory that can serve you for many years.

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 topless.

And most importantly, glasses give a feeling of anonymity, incognito, and hence a feeling of peace and confidence: in private we rarely have complexes. Figuratively speaking, a person wearing sunglasses sees more than himself is visible.

These mirrors of the soul give us away before anything else.

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 maintain a conversation on a certain note, but it is much more difficult to control our eyes.

And nothing can disguise your eyes better than sunglasses.

Psychologists are sure that they have a double sexual effect.

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

So sunglasses a very sexy attribute of our appearance.

Men's sunglasses are no less important!

Now let's look at the man wearing sunglasses.

According to established stereotypes, often originating from cinematic cliches, the man in sunglasses looks somewhat brutal, sometimes even sinister. There is some threat emanating from him - his actions are unpredictable. We do not see his eyes, and therefore do not know what to expect from him.

In short, sunglasses help you get rid of inhibitions and make a certain impression. And they need to be used in cases where it is necessary to overcome a certain barrier. They will help when meeting a girl (boy), on a first date, at 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 are illegal. This happens in cases where it is customary to play openly, for example, during negotiations.

Let's find out what should be the first consideration 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 at the Moscow medical center"Optical" Svetlana Grigorievna 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 the spring and intensifies even more in the 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 any of this from happening to your eyes, make it a rule: in spring and summer, on sunny days, when going outside or driving a car, always wear sunglasses. Good to pick up suitable optics with dark glasses, including those with diopters, is not a problem now.

The main thing when choosing is the right lenses

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 become deformed 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 are able to absorb.

Take a good look at the inside of your glasses. The markings you'll 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 light; “G-20” - gray (from English gray) or green (from green) lenses that transmit 20% and block 80% of light. It is advisable to choose glasses with a lower number, for example “B-15” or “G-15”, rather than “B-20” or “G-20”. This way you can protect your eyes as much as possible from ultraviolet rays.

If you are going to spend a holiday at sea or in the mountains in spring or summer, choose special, multifunctional glasses that will protect your eyes well from the sun in any conditions. The lenses of such glasses can be of any color, but must have a mirror coating. It very effectively reflects especially bright, sometimes simply blinding sunlight from sea ​​water or on snowy mountain tops. 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, glasses with a mirror coating are especially suitable for you. During the day they will reflect the sun hitting your eyes through the windshield, and at night they will reflect the blinding light of the 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 glasses for motorists. The color of their lenses should not confuse you - it can be anything. Polarizing agents included in lens glass do not affect their color in any way.

What are chameleon glasses

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

If you are nearsighted or farsighted, try to choose glasses with diopters, the frames of which have photochromic lenses inserted - “chameleons”. You will be comfortable in them both indoors and outdoors. If for some reason you don’t like them, buy sunglasses with simple dark lenses, but with diopters.

Finding these is not a problem now. This requires a prescription for glasses written by an ophthalmologist, and a good optical store that not only sells finished products, but also accept orders for the production of glasses. Including extraordinary ones: for example, sun protection, with glasses with different diopters.

How to evaluate quality

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

Branded quality glasses with good lenses and the frame cannot cost less than $50. Tempted by the cheapness, you risk purchasing glasses that are harmful to your 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 as “ultraviolet 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 in spots. Under artificial lighting, for example, good “chameleon” lenses do not darken at all, but 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 sag, be fairly heavy 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 become loose during use and do not fall out. Bad frames of cheap glasses are usually very light and not entirely smooth.

The arms are always attached to them with screws, which fall out every time if they are not tightened in time. Typically, such 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 face down on a hard surface. If necessary, wipe 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 choose them casually, without taking into account your facial features. Meanwhile, they can highlight the attractive aspects of the face and correct its imperfections.

• So, if you are round-faced, pay attention to rectangular glasses, without rounded parts, with frames of a very dark color. They will make your face look narrower.
• A square face becomes more correct form, if you optically reduce the width of your cheekbones and lower your chin. Glasses with a slightly rounded shape and a thin metal frame, sitting high on the bridge of your nose, will help you achieve this effect.
• 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, in black or dark brown frames.
• If you have a triangular face, choose glasses that sit low on the bridge of your nose, with thin oval-shaped metal frames and small lenses in soft colors. In them, a too wide forehead and a narrow chin will look more balanced.
• Almost any sunglasses will suit the most correct oval-shaped face.

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 do several fittings. Please note that it is too a long nose can be shortened by glasses frames with upturned edges and a double bridge on the bridge of the nose.

A large nose will be slightly reduced by large frames that go well 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. Taking the time to choose your sunglasses will make you look even more attractive and protect your eyes from UV rays.

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

Why does the sun harm 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 to sunlight on the eyes 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 was subsequently only partially restored.

What to consider when choosing glasses

The selection 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 your eyes, but also provide comfort and image clarity. Ideally, sunglasses should change the brightness of the image, but not change the color rendition.

Material

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

And here infrared radiation, which is also undesirable for the eyes, 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 not always able to retain solar radiation. If the lenses are simply colored and do not have UV protection properties, the dose is even greater than that received through a clear lens. After all, the pupils dilate behind dark lenses.

Attention!

Poor quality sunglasses contribute to more severe damage eyes with ultraviolet radiation. This is especially true for children and adolescents, since they are more likely to be outdoors 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

High-quality sunglasses have special markings that help you make the right choice depending on your needs. The level of protection is indicated in the inserts supplied with 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. Minimum protection against all types of ultraviolet radiation.
• “1”, “2” – light transmission, respectively, 43–80 percent and 18–43 percent. These glasses are recommended for use in urban environments, since they only partially protect against ultraviolet radiation.
• “3” – light transmission 8–18 percent. This type of glasses can be chosen for regular beach holidays and outdoor trips.
• “4” – light transmission 3–8 percent. This is a very dark filter designed for high altitudes and hot countries.

Polarized lenses

Polarizing filters prevent intense reflection of light from surfaces (wet asphalt, snow, ice, water) from reaching the eyes, leading to poor visibility. By cutting off the harmful part of the “light”, they provide more comfortable and clear vision.

Photochromic lenses

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

They are used in 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 darkening speed and lightening speed, 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 darkening of photochromic lenses is less, and the eyes are less protected by them.

Over time, the photochromic agents in the lenses may wear out and the lens darkening will weaken. Therefore, such glasses must be regularly replaced with new ones.

How to choose the right glasses?

1. Decide in advance what you need sunglasses for.
2. If you have vision problems or eye diseases, be sure to consult an ophthalmologist before choosing sunglasses.
3. Avoid buying sunglasses from stalls and markets. Quality glasses don't have to be expensive. Choose from those sold in stores, such as tourist shops, that have clear labeling and inserts.
4. Carefully study the labeling of the glasses - it indicates how much ultraviolet rays the lenses of the glasses transmit, whether they are able to adapt to the brightness of the light or remove glare.
5. If you drive a car or often go out into the sun and back, buy glasses with photochromic lenses. To relax in the snowy mountains, it is better to purchase glasses with polarized lenses.

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

High quality, stylish glasses decorate the people who wear them. They blend into your face and harmonize with clothes and jewelry. With the help of sunglasses you can not only protect 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 take into account the contours of the face, the shape of the eyes, and the length of the hair, and even its color. Of the secondary components of a successful choice, blondes go for light or plain frames, and brunettes go for colored and bright ones.

Sunglasses should serve not only decorative purposes, but also protective function. Modern, sleek sunglasses design must be combined with good UV protection, divided into categories 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 manufactured with various coatings: anti-reflective, photochromic, hardened, water-repellent, etc.

The demand for sunglasses and, accordingly, their purpose is determined by three components:
Firstly, ensuring visual comfort in sunny weather: sunglasses reduce the flow of visible light to a comfortable level (“the sun does not blind”). At the same time, the fullness of color rendering and contrast sensitivity, clarity of vision should be preserved to the greatest extent possible, and optical distortion should be excluded.
Secondly, ensuring safety: sunglasses must completely absorb the ultraviolet (invisible) component of the spectrum of natural sunlight, which can harm the eyes (sun-related 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 only attract attention, but amaze and delight others with their shape, color and, of course, rich decoration.

You can buy glasses that are not too expensive, but you should consider:
This year, transparent glasses and, as the opposite, glasses with mirror coating will remain relevant. If you like colored glass, keep in mind that breaking the usual color range towards any one color noticeably scatters attention, and a person wearing colored glasses gets tired faster.
The density of the filter determines the amount of visible light transmitted through the lenses. Density depends not only on the “darkness” of the glass, but also on the color of the lenses. In urban environments, it is enough to have sunglasses with a light to medium density; at the beach, at sea or in the highlands, you need a dark filter.

In general, gray or green lenses do not distort colors and can be worn anywhere. Golden yellows block Blue colour, so they are worn in cloudy days. Mirrored ones reflect light, so they are worn at high altitudes in the mountains or near the sea. Plastic glasses can only be purchased with special additives that block ultraviolet radiation.

What material are sunglass lenses made of? From an optical point of view, the best material can be considered mineral glass. His protective properties are maximum and objects are not distorted.
Plastic glasses with acrylic coating protect from ultraviolet radiation, but are easily scratched. It’s 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, as the name suggests, 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 zone. High protection glasses are necessary primarily for the highlands, the Arctic, and regions with ozone anomalies, both in summer and winter.
There is another type of glasses with lenses coated with a special absorber CR-39. Very practical material for a long time services. It is impossible to scrape it off, since it is incorporated into the material at the molecular level.

How to choose sunglasses for those who have poor vision and who already wears prescription glasses?
The first - and main - advice: if your vision is not “one” and you already wear glasses (myopia, farsightedness, astigmatism) or even more so contact lenses, then before putting on sunglasses, first go to an ophthalmologist, and only then order and buy sunglasses with diopters. Otherwise, you can only worsen your vision.

Which glasses are preferable - with glass or plastic lenses?
Both have their advantages and disadvantages.
Glass, unlike plastic ones, 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 easy to scratch. But they will break if they fall on the floor, and even more so on the asphalt. Even worse, if you yourself fall face down or someone hits you - shrapnel broken glass With high probability may get into eyes. By the way, it is for this reason that in some Western countries It is prohibited 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 special technology that allows the plastic to also not transmit ultraviolet radiation.

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

Which frames suit whom?
Blondes are suitable for frames made of gold, silver, or titanium alloy. For fair-haired and red-haired people - bronze, gold, copper or tortoiseshell.
Brown-haired women and brunettes should wear frames in all shades of red and brown. For hot brunettes - black or gold.
For platinum blondes and gray hair - from silver, platinum, titanium.
The general rule for choosing sunglasses is the bigger the better. The best choice is glasses that make their owner look like a dragonfly. It is desirable that the glasses have wide arms that cover the sides of the eyes.

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

Tips for buying sunglasses:
Don’t skimp and buy a case for your glasses, or even better, a case.
White frames are almost always in fashion, so keep this in mind when choosing sunglasses.
Always place your glasses on a hard surface with the lenses facing up - this way 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 glasses from dust with thin suede or a clean, slightly fleecy cloth.
If you have a round face, it is better to choose bright frames that distract attention from your face shape.
Glasses should not transmit more than 50% of light. Previously, it was believed that it was better to buy glasses with lenses. They were wary of plastic because it was unevenly colored, and this also spoiled vision. But now the level of plastic production is so high that this problem practically does not exist.
If you are planning to buy glasses on the market, then keep in mind that these colorful things can best case scenario 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 - narrowing, on the contrary, expands and receives all types of radiation from full program. You should not rely on the materials from which such glasses are made to comply with environmental standards. And nickel frames often cause skin irritation for many.
Anyone who relaxes on the beach does not take off his sunglasses even in the sea - after all, the eyes are especially affected by glare on the water.
Good sunglasses are not cheap, but you can also spend a lot of money on sunglasses that are not at all guaranteed to be of good quality.