Sunglasses with good protection. How to choose the right sunglasses

Sunglasses are not only a fashion accessory, but also a great way to protect your eyes. Today it is difficult to imagine a person who would go without glasses in the summer. Modern manufacturing firms supply various accessories to every taste and budget on store shelves. You can find colored or tinted lenses enclosed in a plastic or iron frame. When it comes to choosing sun glasses, there are a few things to keep in mind.

What are sunglasses for?

The main task of the accessory is to minimize the harmful effects of ultraviolet rays on the eyes and the skin around them. However, it is important to remember that not every sunglasses can perform this function.

Fashion trends leave their mark on society. People choose sunglasses without paying attention to their quality. Indeed, in such a case, the main thing, in the opinion of many, is beauty and compatibility with clothes.

But in fact, glasses must be chosen not only beautiful, but also of high quality. Lenses should protect the cornea of ​​the eyes from ultraviolet radiation and preserve the delicate skin around them.

Otherwise, you run the risk of cataracts or eye degeneration. Such consequences will be extremely sad. Especially strongly the sun harms the elderly, drivers and those who work a lot at the computer.

What can the effect of the sun on the eyes lead to

Experts in the field of ophthalmology advise to be more careful about the accessories that are used to protect the eyes. Ultraviolet rays cause damage not only to vision, but also to the general state of human health. Already after 2-3 hours of walking without glasses, tremendous discomfort begins, which manifests itself in severe soreness of the eyes.

More unfortunate consequences are manifested in the following:

  • loss of vision (partial);
  • receiving a burn of the eye cornea;
  • the onset of cataract development.

However, it should be understood that direct ultraviolet does not always lead to severe functional impairment. Sometimes after prolonged exposure to the sun without glasses, pain, tearing, decreased vision, etc. appear. This is the beginning of something more, you need to see a doctor or immediately buy sunglasses.

Skiers, snowboarders, polar explorers or drivers often face such a problem as “blinding blindness”. This is a burn of the eye cornea, which appears due to the reflective surface. For example, snow or water.

There is a single rule: the higher the activity of the sun, the more aggressive the action of ultraviolet rays. If you add to this reflective factors in the form of blinding snow or water, you endanger your eyes 3 times or more.

Types of sun lenses

Many mistakenly rely on the frame when choosing glasses, but in the case of eye protection, such a decision is reckless. So that the sun does not affect the retina and cornea, it is necessary to select high-quality lenses. Not always dark glasses speak of UV protection, some coatings simply do not cope with their task.

It should be remembered that low-quality lenses (fake) will lead to even more harm. Under the influence of the sun, the pupil becomes narrow, and in such glasses it takes on the entire solar wave, as if remaining in the shade.

To date, there are several main types of lenses - glass, plastic, made of polycarbonate. Each material has its own positive and negative qualities.

glass lenses

Not many people know that even completely transparent (not tinted) lenses protect against the harmful effects of ultraviolet rays. If you like this option, it is not necessary to buy glasses with black or dark brown lenses. The main thing is that they are slightly darkened.

Glass lenses under mechanical stress may be too fragile. But, nevertheless, they are better than plastic will resist scratches. You should not buy glass glasses for playing volleyball or football on the beach, as well as for those who drive a car.

plastic lenses
Lenses of this type, unlike glass, will not crumble into small particles upon impact. In most cases, a long crack is left on the plastic, which then leads to the splitting of the lens in two. But the fragments will not fall into the eyes.

The material has the ability to transmit ultraviolet rays. Therefore, you should not count on 100% protection of the eyes and the skin in their area. In addition, at temperatures above the norm, glasses can lose their shape. Plastic lenses are stored in a case.

Polycarbonate lenses
For those who don't know, polycarbonate is an impact-resistant material that also has the ability to protect the cornea from direct ultraviolet rays. Lenses are made of polycarbonate 1-2 mm thick, thanks to which the glasses withstand tests even with a shot from a pistol (small caliber).

Numerous studies have also proven that polycarbonate does not break even under a hammer. It can be concluded that sunglasses with such lenses will be the most durable. They do not scratch or crack, but you will have to pay a decent amount for an accessory.

Most often, polycarbonate-based lenses are produced by eminent Italian brands. They not only do not let ultraviolet through, but also have the ability to eliminate glare (snow, wet asphalt, etc.). These lenses are ideal for drivers, skiers and those who spend a lot of time near the water.

Lens light transmission
Accessories that are sold in specialized optics stores have a passport. Also on the glasses should be a sticker that indicates the degree of light transmission of the lenses.

If you notice the “0” mark on the accessory, this indicates full light transmission and the absence of retinal protection.

When the number “1” is on the lenses, the accessory will protect your eyes by 40-65%, no more.

With a value equal to "2" about 35-20% of ultraviolet rays will reach the eye retina. These glasses are good for use in the city.

Models with an indicator of "3" are ideal for any work on the street. Also, this option should be chosen by people who spend a lot of time at sea or are going on vacation.

When marked in "4", about 5-8% of the light reaches the retina. Accessories are suitable for skiers and those who travel a lot in hot countries with a constant presence of the sun at its peak.

Important!
If you don't see any markings on your sunglasses, prepare for zero effectiveness. Such accessories will not protect the retina, so wear them for no more than two hours.

The color of sun lenses and the degree to which they are tinted affects the perception and well-being of the eyes. Conventionally, these characteristics are divided into 2 subspecies, we will consider them in order.

Green, gray, brown lenses are pleasant to wear, the eyes do not get tired in them as much as when wearing other types of glasses.

Orange, red, pink, yellow is undesirable to wear. In the process of use, such accessories distort visual perception, affect the psyche, and contribute to eye fatigue.

The ideal option would be a mirror coating, but if worn incorrectly, such glasses are quickly scratched and interfere with “viewing”. The accessory should always be kept in a case.

Lens coating

Allocate polarized and photochromic coating of sunglasses lenses. Spraying plays a role, so let's look at the intricacies of choice.

Polarized lenses
The polarized coating has the best protective performance of any lens available. A positive feature is that glasses of this kind protect the eyes equally well, even if there is a sharp change in sun exposure.

For example, while driving a car, it began to rain sharply. The asphalt will begin to glare, the glasses will prevent eye exposure by reflecting bright flashes. The same applies to recreation on the water or snow.

Glasses with polarized lenses should be preferred by car drivers. Such an accessory will prevent the reflections of a wet road and the impact of oncoming headlights.

Before buying, make sure that the lenses are of sufficient quality. Ask the seller for a passport, which will contain all the necessary information. It is important to look for the label "polarized lenses" or "anti-reflective coating".

To finally make sure of the quality, put on your glasses and pick up your mobile phone. Set the maximum brightness on your smartphone and rotate the gadget at a certain angle. If the lenses begin to visually darken, this indicates eye protection. You can take this option.

photochromic coating
In addition to blocking out light, photochromic sunglasses also block out a certain percentage of UV rays. An accessory with polarized lenses cannot boast of this quality.

This option is suitable for categories of people who are afraid of the light or feel discomfort from bright illuminations. To create a photochromic coating, experts resort to the use of special sputtering materials. They have no effect in the scorching heat, but are great for wearing in medium or low temperatures.

Accessories of this kind are not suitable for wearing on the beach. But they will be effective for drivers who spend a lot of time driving at night. Due to the good reflection of light, the photochromic coating is ideal for skiers when the reflection of snow strongly affects the retina of the eye.

Choosing sunglasses for driving

  1. In most cases, drivers choose glasses for themselves, based on comfort and the correct shape of the frame. Such people do not follow fashion. The accessory must fully protect the eyes from harmful ultraviolet radiation.
  2. Drivers need to choose the right lens color. Glasses should have a green, brown or grayish tint. Lenses of these colors are great for driving and do not create artificial glare from the road. In this case, it is much more comfortable to control the situation.
  3. When choosing glasses, the lenses must be coated with an anti-reflective coating. Such an addition is present on all high-quality and expensive accessories. The most suitable option would be an accessory with polarized lenses.
  4. Glasses of this quality allow you to improve visibility by filtering out excess light. The only disadvantage of such models is that they are not available with diopters. The use of such glasses is acceptable with the temporary wearing of lenses to improve vision.

The choice of sunglasses for children

  1. If you decide to purchase high-quality sunglasses for your child, in this case, you should not save. Consider models marked "Polarized". Spectacles with special lenses prevent bright reflections and refract the reflection of rays from bright surfaces.
  2. An accessory with polarized lenses blocks almost 100% of the reflected rays. Ordinary glasses with dark lenses only slightly refract glare and sunlight. As for the material, it is better to choose an accessory made of polycarbonate plastic.
  3. Such glasses do not distort the image and color, they are difficult to break and scratch. For a child, these indicators are important. In the event of an unforeseen situation, the baby will not be injured by a fragment.


round face

  1. If you have a round face, it is recommended to give preference to glasses with a wide frame. In this case, the shape of the accessory should resemble a cat's eye or a drop.
  2. You should not choose glasses of a round strict form. You can also consider an attribute with rectangular or square lenses. Keep in mind that these glasses are only suitable for those with a thin neck.

Square face

  1. Owners of this type of face are recommended to consider an attribute with a thin frame and oval-shaped lenses. Keep in mind when choosing glasses, they should not be wider than the head.
  2. If you accidentally purchase glasses that are wider than your face, the latter will appear much more massive. Also, do not consider too miniature models.

triangular face

  1. This type of face is quite rare. In this case, with the help of glasses, it is necessary to visually correct the appearance of the head. A well-shaped accessory will reduce the eyes, forehead and hide a small chin.
  2. It is recommended to consider models with round lenses, while the attribute should not be too large. In this case, glasses with additional stickers and decorations will not spoil the look at all. Consider classic style glasses.

Oval face

  1. If you have an oval face type, you are very lucky. In this case, the selection of points will not be a problem. Consider attributes of absolutely any style. If the budget allows, you can change the attribute every season.
  2. The only problem with an oval face is that you visually need to increase the width of your head. It is not recommended to consider glasses with an inconspicuous or narrow frame. Give preference to extravagant models.
  1. It is recommended to choose an accessory with a plastic frame. If you often visit the beach, the metal material in this case is completely contraindicated. Such a frame better reflects the rays, thereby exposing the face to pigmentation and burns.
  2. If you choose glasses not for driving, give preference to mirrored lenses. The latter, in turn, better reflect ultraviolet rays. When relaxing in a resort with a scorching sun, you must wear glasses that will cover most of the face.
  3. You should not wear an accessory with blue or pink lenses on sunny days. They pass ultraviolet well and do not protect the eyes at all. It is better to wear a similar attribute on cloudy or cloudy days.

If you want to buy really high-quality glasses that will meet all the requirements, the attribute should be purchased in professional stores. An ordinary accessory with dark lenses does not at all guarantee protection from harmful radiation. Good glasses should have a protective film. Choose the option marked "High UV-protection".

Video: how to choose sunglasses

Good day, dear lovers of shopping in China.
I want to talk about cheap sunglasses and super duper mega fast delivery by "China Post Air Mail".


To be honest, if it were not for the fact of almost lightning-fast free (!) Delivery, I would not have undertaken to review these glasses. there is nothing particularly remarkable about them - glasses are like glasses. It all started with the fact that I watched the movie "The Counselor / The Counselor" (2013), I remember the shape of the glasses of the main character.

Wandering around the vast expanses of AliExpress, I found from afar a frame reminiscent of what interested me (critics can pour out in the comments that it doesn’t look like anything). Two sellers had $ 2.5 shipping with a product value of up to $ 3. The toad choked me for two days. As a result, quite by accident, a seller with free shipping and a price of $ 2.16 caught my eye. According to reviews, everything seems to be good - delivery on time, glasses come with unscratched lenses (unlike other sellers). I think even if the shape of the glasses does not fit the shape of my face, you can always fuse them to your younger brother. It's decided. We take. I place an order on 01/15/2015, pay, wait. Experience tells me that I will not see the parcel for 1-1.5 months. The seller, after a couple of hours, gave a track that was tracked only in China (and no wonder at such and such a cost of the goods). After sending, he thanked me for choosing his store, showering me with emoticons and "diar friends". In general, for sociability, definitely 5.

This is backstory.
Now the story itself.
My surprise knew no bounds when on January 27, 2015 I found a notice of the parcel in the mailbox. Because the day before, I took 3 parcels from the post office, I thought that there was some kind of mistake, I called back a couple of times to the department and, without getting through, safely forgot about it. On January 27, 2015, I see a notice in which the postman says “REPEATED” with the firm hand of the postman. Well, I think there is clearly something waiting for me there. Went down. So yes, my package.



Pay attention to the Chinese postage stamp - the parcel was registered in the National China Post on 01/22/2015.

You can create a delivery schedule:
01/15/2015 Order payment
01/19/2015 Departure from Warehouse (Yanwen Express)
01/19/2015 Arrival at Warehouse
01/22/2015 Registered with China Post (according to the postage stamp)
01/27/2015 The parcel was in the post office at my place of residence

Tell me, comrades, did any of you receive a penny parcel from China so quickly?

Let's get back to sunglasses.
In addition to the frame, zip-locks and a pink handkerchief. The fabric is not a fountain, quite hard. I think that micro-scratches will remain on the plastic over time after wiping with such a cloth.

Let's take a closer look at the frame.
There is a manufacturer's sticker with the strange name "Flower horse" on the lens. I'll take the sticker off quickly...

There is nothing remarkable on the arms, ordinary plastic without frills. Nose pad is solid.








Lenses are plastic, gradient. The tint color is dark purple, pleasing to the eye (my eyes are very sensitive to low-quality lenses).

I noticed a jamb of production - one of the pebbles-decorations is glued crookedly. It does not catch the eye, but if you know, then it is no longer comme il faut. You can, of course, get confused and try to tear off the pebble and re-glue it evenly, but I think “nuegonafig”.

In the evening I went to an ophthalmologist I knew at the optician's to check the lens for protection. Was pleasantly impressed. The standard UV protection tester showed 385 and 390 UV. Nice, "Schjort pabierri!" ©.
Proof:





Lyrical digression.
The inscription on the lens UV400 or 100% UV protection means that the glasses protect against harmful ultraviolet radiation. The number 400 is not accidental: a light wave is measured in nanometers, and ultraviolet ends at a wavelength of 380 nanometers. So high-quality sunglasses do not let through not only all the invisible ultraviolet, but also a little extra blue light - in reserve, so as not to harm the eyes.

Device on my impudent unshaven muzzle:

Perhaps connoisseurs of glamor will say that this form of frame does not suit me, but I will say that I don’t care - I like it.
Upd: comments on the similarity of the author of the review and the Prime Minister of Ukraine A. Yatsenyuk are not welcome and remain on the conscience of commentators.

As a result, for 2.16 evergreen American rubles we have:
- manufacturer "Flower horse";
- lightning fast delivery;
- crookedly glued decoration (not very noticeable in principle);
- a light frame that does not put pressure on the bridge of the nose and the presence of real UV protection (which is surprising at such a price).

All the best!

I plan to buy +12 Add to favorites Liked the review +23 +51

Of course, it is impossible for modern people to do without glasses with sun protection properties, especially at the time of the year when the sun begins to actively appear. This accessory not only protects a person's eyes from ultraviolet radiation, but is also a stylish addition to any look. True, you need to understand how to choose sunglasses wisely so that the accessory fulfills its requirements as much as possible, looks harmoniously in the image.

Why do you need sunglasses?

Of course, such glasses are not only beauty, but also eye health. The fact is that this organ is very vulnerable, especially since it is easy to injure it with the help of sunlight. Of course, the eyes have their own protection, which was thought out by nature, but still it is not always enough. Moreover, when the sun shines in a person's eyes, they get tired, the person squints, wrinkles appear, etc.

So why do you need to know how to choose sunglasses? It is worth noting that in addition to beach lovers, they will be useful to motorists, active tourists, and indeed to all people who leave their homes during the sunny season. In addition, children also need glasses, their eyes are even more vulnerable and the active sun can cause them serious harm.

That is, sunglasses are necessary for everyone, therefore, they cannot be neglected.

How to choose sunglasses?

Such an accessory must be chosen carefully, as it is necessary that it meets all the necessary requirements. For example, there was a good degree of protection, correct lenses, frame, comfortable fit, harmony of the shape of the product with the shape of the face. Therefore, there are several factors that can be distinguished at once, how to choose sunglasses.

The degree of protection of sunglasses

It cannot be neglected, because it depends on whether the eyes are safe. It is advisable to buy branded, high-quality glasses, because they have a special insert in which you can find all the necessary information about the degree of protection of this product. According to this criterion, points are usually divided into several groups.

  1. Zero group, it transmits from 80 to 100% of the light, that is, such products are capable of protecting only from the sun, which barely breaks through dark clouds. Otherwise, they are useless.
  2. The first group can transmit at least 43% of the light, so these glasses are suitable for cloudy weather, in the late afternoon.
  3. The second group of products transmits from 18 - 43% of the light, it is quite possible to afford to wear such products in sunny weather.
  4. The third group misses at least 8%, for the summer, the most active sun, this is a good option.
  5. The fourth group can let in only 3% of the light, this is an ideal option for all those who relax on the sea coast or conquer mountain peaks. These goggles can provide good protection to your eyes, so you don't have to worry about their safety.

Now many people wear lenses and therefore in the summer they also have to put glasses on their eyes, this is not very convenient, so you should know that there are lenses with ultraviolet protection. They are not much more expensive than regular ones, but they protect really well. The advantage of lenses is that their owner can easily buy any sun glasses he likes, because their degree of protection will not be important: his eyes are already protected.

Sunglass lenses

Another important factor in the question of how to choose sunglasses is lenses. Modern models are found with a wide variety of colors of glass and plastic to protect the eyes.

Quite popular are polarized lenses. They are mainly loved by those who often fish, as well as people who prefer active recreation on the water. The thing is that they allow you to see well even in the presence of strong reflectors nearby, that is, they do not transmit reflected light directly from the water surface.

There are also photochromic lenses, such when a person is indoors, they look exactly the same as ordinary colorless lenses, but already on the street, being exposed to sunlight, they darken. This is very convenient for those who, due to poor vision, are forced to wear glasses absolutely always, and have to constantly change pairs in sunny weather. Only one pair can be used with photochromic lenses.

You can purchase glasses that have standard, colored lenses. Car enthusiasts are not recommended to wear lenses with a rich dark color, as this may interfere with driving.

Fashionable at the moment are mirror coated lenses, as well as colored with a gradient. This trend is supported by young girls and guys, because it fits well into everyday style.

Speaking of shades of protective glasses, we must not forget here that their color can distort the real colors of the surrounding world. It is best to give preference to glasses with brown lenses, in which a person will be most comfortable.

Frame for sunglasses

The comfort of wearing sunscreen accessories largely depends on the frame, so it should also be chosen very carefully. First of all, it is very important to try on glasses before purchasing a model to make sure that they fit well. They can hold well on the bridge of the nose, but at the same time do not squeeze anything. In a properly selected accessory, the frame does not fit snugly to the face, leaving marks on the cheeks or around the eyes.

The length of the temples is selected so long that they hold well on the ears and do not fall when tilted or moving the head.

Nose pads also play an important role, it is important that they do not squeeze the bridge of the nose and do not cause discomfort. If the nose pads leave deep marks, then most likely you should look at other glasses, because during the day with such a frame it will be uncomfortable.

As for the color and shape itself, it all depends on the preferences of a particular person, you can choose a brighter frame, you can give preference to discreet shades. In terms of form, it is necessary to build on your natural data, namely the shape of the face, because the accessory should decorate.

It is best to choose frames with wide lenses, they protect the eyes much more effectively from ultraviolet radiation.

The material of the frame must naturally be durable, only in this case they can last a long time. Now completely different materials are used for the manufacture of frames: metal, plastic and even wood, the final price of the accessory depends on this.

Knowing how to choose sunglasses based on your face shape, it is easy to get rid of the fullness of the cheeks, make the nose more accurate, and emphasize the cheekbones.

Round Face Sunglasses

Ladies with a round type are best to get an accessory that is wider at the temples and also has a wide shape. In this case, it is easy to correct the roundness of the face by reducing it, making it not so wide. As for the specific shape, a wide rectangular frame or square frame is ideal.

The most important thing is that the frame is larger than the shape of the face, with the help of such a trick, it is just possible to disguise rounded cheeks.
It is advisable to abandon those frames that have decorative elements, because they can have the opposite effect, rounding facial features even more. It is best to purchase frames in solid colors, not too catchy. The metal frame of the glasses will stand out very stylishly.

Sunglasses for an oval face

The oval shape is ideal, so almost all glasses fit it. However, there are those models that look the most successful. When choosing a sunscreen accessory, you need to clearly know what effect you would like to achieve in the end. For example, some women want to reduce their age with this accessory, others just want to look stylish, etc. Each case will require different glasses. Fortunately, there should be no problems with the selection of frames, because the assortment in stores is very wide.

It is advisable to refrain from too bulky frames, because they can change the ideal face for the worse. But sophisticated frames will look very advantageous on this type of face.

The face will look younger if you use round owl glasses, especially since such a model is always relevant and fashionable. Products with a correct and clear geometric shape of the frame will draw all the attention to the face. You can use this approach if necessary.

Sunglasses for a square face

It is not so easy for owners of a square-type face to purchase a suitable accessory for themselves. But if you clearly follow certain recommendations on how to choose sunglasses for this type, then this is quite realistic.

Glasses that have clear shapes are contraindicated for such ladies, no round and square glasses can be purchased, this will only aggravate facial imperfections and make them more noticeable. But you can choose frames with smooth lines, these perfectly balance the face.

An accessory that is too massive is clearly larger than the face, it will only draw attention to it, making the features even more bulky and large. You can choose products with decor that will help your face become narrower. The so-called cat-eye glasses are very fashionable now, this is an ideal option for a square face type.

Lenses of absolutely any color, even the most unusual ones, are suitable for a square face. Thanks to this, you can experiment by choosing options suitable for the occasion.

Sunglasses for a triangular face

A triangular face looks unusual and interesting, because the face of this shape tapers to the chin, so it is very important to balance it with glasses so that the shape looks more ideal. Surprisingly, but this type of face is suitable for many forms. The most successful choice would be round glasses or those in which the emphasis will be placed on the bottom line. This trick will balance the forehead and chin.

Owners of a triangular face type should try on accessories that do not have a frame at all. But massive frames will have to be abandoned so as not to distort the natural features. Cat-shaped glasses are also not the best option, which will make the triangular shape of the face even more pronounced and asymmetrical. You will have to avoid frames of bright colors, as well as frames that are square in shape.

It would seem that a lot of tips have already been sorted out on how to choose sunglasses, but the tricks do not end there. After all, the more competently sunglasses are chosen, the longer they will last and the safer they will be directly for the eyes. Therefore, it is important to know what to look for when buying.

You can not neglect the choice of this accessory, because it protects one of the most important organs - the eyes, allows vision not to deteriorate and not experience discomfort in the sunny season. Glasses are now sold in almost any store, and even in transitions and the subway, but it is best to purchase them in optics stores. Yes, they are more expensive there, but you can be sure of their quality. As a rule, salon employees can provide all the necessary certificates for the product and even give a guarantee for it. In addition, consultants will professionally help with the choice of passing form, lenses and frames.

It is very important to try on glasses, and preferably not alone. The more models will be considered, the higher the likelihood that in the end the right choice will be made, which the buyer will not regret later.

Naturally, you need to take into account the degree of protection of the lenses. For example, those that belong to the zero and first groups are usually called cosmetic, that is, there is little obvious benefit from them, they are mainly intended for aesthetic beauty, but they practically do not protect the eyes. These can be purchased for wearing in cloudy weather. The second group is universal, they can be worn in everyday life, in an urban environment, they are quite suitable for this, but no more. The third and fourth groups have a high degree of protection, so they are suitable for taking them on vacation to hot countries, fishing, ski resorts, etc. The degree of protection of a particular model can be seen in the documents for it, which you should not hesitate to ask the sellers, they are required to demonstrate them.

The color of the lenses also matters. Not all colored lenses protect the eyes well from ultraviolet radiation, and this should be taken into account. For example, green or dark gray, brown lenses will be good. Thanks to these colors, the eyes will not get tired, but red lenses worsen a person's orientation in space.

Glass lenses protect your eyes from the sun very well. If they are made with high quality, then even scratching them will be very difficult. As for plastic lenses, they are cheaper, and much less in weight, but their protection is not so good, and their service life is very minimal.

High-quality glasses are a necessary accessory for any person, it will allow you to look stylish and protect your eyes. Considering all the nuances of how to choose sunglasses, they will definitely complement any look without loss of health.

In the video below, a professional stylist will talk about all the intricacies of choosing sunglasses for each face shape. With such advice, it is simply impossible to make a mistake.

Not everyone buys sunglasses to keep eye health because they have long been a fashion accessory. However, we really need them to protect our eyes from sunlight, dust and other adverse factors. Let's figure out why the sun hurts our eyes so much How can you protect yourself from it and buy the right sunglasses.

Sun damage to the eyes

The sun is a source of heat and energy, without which all life on Earth is unthinkable. However, as you know, everything is good in moderation, and prolonged exposure to the sun is fraught with the development of a number of undesirable phenomena, mainly on the skin and eyes.

It has been clinically proven that if a person stays under the direct rays of the sun for a long time without appropriate protective equipment, then this can damage not only the surface of the eye, but also its internal structure. In the future, this leads to the development of acute and chronic eye pathologies that require serious treatment.

With direct exposure, the cornea of ​​\u200b\u200bthe eye is damaged, and such a lesion is similar to a skin burn. In addition, regular exposure to ultraviolet radiation on the eyes has a cumulative effect, which can cause the development of serious eye pathologies. So, in rare cases, when exposed to ultraviolet rays, the development of melanoma of the eye is possible. This is a rare, but at the same time very aggressive disease that metastasizes very quickly. There is currently no cure for ocular melanoma.

Ultraviolet is also harmful to the eyes in that it can lead to the development of photokeratitis (an inflammatory disease of the cornea), snow blindness, solar retinopathy and dry eye syndrome. As for visible radiation, it can worsen visual acuity and lead to visual fatigue. Therefore, when sitting at a computer monitor, your eyes get so tired.

It is noteworthy that the eyes of children and adolescents are more susceptible to ultraviolet radiation. This is due to the fact that their pupil is wider and the lens is more transparent than in adults. In addition, children spend more time outdoors than adults and use quality sunglasses less often. As a result of such activity, up to the age of 18, children receive up to 25% of the life dose of ultraviolet radiation. In this regard, protection from ultraviolet radiation is extremely important, especially in childhood and adolescence.

Types of ultraviolet rays

Ultraviolet rays are components of sunlight, and depending on the wavelength, they are of three types: UV-A, UV-B and UV-C. According to the laws of physics, the shorter the wavelength, the greater the energy effect it has. Therefore, shorter wavelength ultraviolet rays are more harmful to the body than longer wavelength ultraviolet rays.

  • Type A ultraviolet rays. These ultraviolet rays have the longest wavelengths, and they contribute to the appearance of a tan. In addition, it is these rays that are responsible for premature skin aging.
  • Type B ultraviolet rays. Sunburns are mainly caused by exposure to ultraviolet B rays. In addition, they are the most common cause of skin cancers (in particular,). Prolonged exposure to the eyes can provoke the development of cataracts.
  • Type C ultraviolet rays. This type of ultraviolet rays is the most dangerous because it has the shortest wavelength. Thanks to the ozone layer, ultraviolet C rays do not reach the surface of the Earth, although the appearance of a large number of ozone holes has led to the fact that these rays began to penetrate the globe.

It is noteworthy that the strongest ultraviolet rays act on the eyes in the morning and in the afternoon, and not at noon, as many people think. So, most of us hide from the sun when it is at its zenith, fearing the negative effects of sunlight on the skin. However, unlike the skin, the eyes are affected by the sun's rays that shine at eye level. Therefore, morning and afternoon are the most dangerous periods.

Factors affecting the intensity of ultraviolet radiation

Do not forget that there are many factors that affect the intensity of ultraviolet radiation. If you want to protect your eyes from excessive insolation, then you should definitely know the following:

  • Clouds do not protect against UV rays. So, more than 90% of ultraviolet radiation penetrates through clouds.
  • In the mountains, the intensity of ultraviolet radiation is higher than in the lowlands. When rising to every thousand meters, the radiation intensity increases by about 10-12%.
  • Pure snow can reflect up to 80% of ultraviolet radiation, and dry beach sand - only up to 20% of radiation.
  • reflects up to 30% of ultraviolet radiation.
  • Ultraviolet penetrates into the water column, and at a depth of 1.5 meters its intensity is 40% of the intensity on the surface of the reservoir.

Sunglasses: how they can help

Buy sunglasses- not all. Main choose high-quality UV protection. Sunglasses help us in bright sunny weather by protecting our eyes from glare. However, not all glasses protect against UV rays. If you wear glasses without an ultraviolet filter, you only make things worse. So, in the dark, the pupil dilates, which means that more sunlight than usual enters the retina of the eye. As a result, with such glasses you will get a retinal burn.

Quality ones should be made of glass or polycarbonate. It is noteworthy that each of these materials has its own advantages and disadvantages. Both glass and polycarbonate reliably block ultraviolet radiation. Glass is much harder to scratch. In addition, it is the most transparent material known to mankind. Therefore, glass is still used in microscopes, binoculars, cameras and other optical equipment. The disadvantage of glass is the fact that it does not block ultraviolet A radiation, so glasses require additional coating. In addition, glasses made of glass come out quite heavy, fog up very easily, and can break if dropped.

As for polycarbonate lenses, they are almost 10 times stronger than glass or ordinary plastic (from which inexpensive sunglasses are made). Such durability of polycarbonate makes such glasses ideal for children and athletes. They are much lighter and thinner than glass glasses and block 100% of UV radiation. The disadvantage of polycarbonate glasses is the fact that this material is quite easy to scratch, and its transparency is not as clear as that of glass. Objects may not appear as clear with polycarbonate glasses.

In addition to glass and polycarbonate, there are other materials from which sunglasses are made. For example, it can be impact-resistant lenses that are convenient for athletes - skiers and snowboarders.

A special coating and the addition of special chemicals provide extra UV protection to the eyes. In darker glasses, the eyes are much more comfortable, because they are less tired from the rays of the visible spectrum. The brighter the sunny weather, the more dark lenses are suitable for it. Lenses of lighter shades are suitable for cloudy or foggy weather.

The degree of protection of sunglasses

There are five types of lenses depending on the degree of protection. Very light lenses transmit 80-100% of the light. They are suitable for wearing in cloudy weather. Dark glasses let in only 3-8% of the light, and they can be used, for example, in the mountains, where the intensity of ultraviolet radiation is much higher than on the plains. If you are going to the sea, then in this case lenses of 2-3 categories are suitable for you, which transmit from 18 to 43% of the light.

Whatever glasses you choose, they should be completely transparent, allowing you to clearly see objects at different distances. High-quality sunglasses have special markings that indicate the degree of protection and the ability of the lenses to adapt to the brightness of the light or to remove its glare. The label indicates the percentage of blocking of ultraviolet rays of type A and B. In some cases, it is indicated exactly where the glasses can be used - in the city, in the mountains or at sea. It is noteworthy that category 4 glasses cannot drive a car, and this is also indicated on the labels.

Separately, it should be said about photochromic lenses - the so-called "chameleons", which react to light intensity and are able to change the degree of dimming, becoming dark in bright light, and almost transparent indoors. True, the photochromic substances on such glasses wear out quickly, so you need to change the "chameleons" regularly.

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