How to choose the right sunglasses

Sunglasses are not only a fashion accessory, but also an excellent means to protect your eyes. Today it is difficult to imagine a person who would go in the summer without glasses. Modern manufacturers supply various accessories for every taste and wallet on the shelves. You can find colored or darkened lenses enclosed in a plastic or iron frame. In the choice of points from the sun it is necessary to pay attention to important aspects.

What are sunglasses for?

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

Fashion trends impose their imprint on society. People choose sunglasses, not paying attention to their quality. Indeed, in this case, the main thing, in the eyes of many, is beauty and compatibility with clothing.

But in fact, the glasses need to choose not only beautiful, but also quality. Lenses should protect the cornea 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 the sun harms people of old age, drivers and those who work a lot on the computer.

What can the effect of the sun on the eyes

Experts in the field of ophthalmology advise to be more attentive to the accessories that are used to protect the eyes. Ultraviolet rays damage not only the eyesight, but also the general state of human health. Already after 2-3 hours of walking without glasses, a colossal discomfort begins, which is manifested in severe pain in the eyes.

More sad consequences are manifested in the following:

• vision loss (partial);
• getting corneal burns;
• the beginning of the development of cataracts.

However, it should be understood that direct ultraviolet does not always lead to severe dysfunction. Sometimes after a long stay in the sun without glasses there is pain, tearing, reduced quality of vision, etc. This is exactly the beginning of something bigger, you need to see a doctor or buy sunglasses immediately.

Skiers, snowboarders, polar explorers or drivers often face the problem of “blinding blindness”. This is a corneal burn that 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 put your eyes at risk 3 or more times.

Types of sun lenses

Many mistakenly rely on the frame when choosing glasses, but in the case of eye protection, this decision is reckless. To the sun did not affect the retina and cornea, it is necessary to select high-quality lenses. Not always dark glass talk about security from ultraviolet radiation, some coatings simply do not cope with their task.

It should be remembered that poor-quality lenses (fake) will lead to even greater harm. Under the influence of the sun, the pupil becomes narrow, and in such glasses it takes upon itself the entire sun wave, as if remaining in the shadow.

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

Glass lenses

Mechanical glass lenses may be too fragile. But, nevertheless, they are better than scratch plastic. You should not buy glass glasses for playing volleyball or football on the beach, as well as for those who drive.

Plastic lenses
Lenses of this type, unlike glass lenses, will not fall apart into small particles upon impact. In most cases, the plastic remains a long crack, which then leads to a split of the lens in two.But the fragments do not fall into the eyes.

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

Polycarbonate lenses
For those who do not know, polycarbonate is a shock-resistant material, which is also endowed with properties to protect the cornea from direct ultraviolet rays. Lenses are made of polycarbonate with a thickness of 1-2 mm., Thanks to this, the glasses withstand the test even with a pistol shot (small caliber).

Also, numerous studies have shown that polycarbonate is not broken even under the blow of a hammer. It can be concluded that sunglasses with such lenses will be the most durable. They do not scratch and do not crack, but for the accessory will have to pay a decent amount.

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

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

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

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

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

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

When labeled "4" to the eye of the retina comes to about 5-8% of the light. Accessories fit skiers and those who travel a lot in hot countries with the constant finding of the sun in peak.

Important!
If you do not notice any markings on the sunglasses, prepare for zero efficiency. Such accessories will not protect the retina, so they should not be worn for more than two hours.

Lens shade

The color of sun lenses and the degree of their darkening affect the perception and well-being of the eyes. Conventionally, these characteristics are divided into 2 subspecies, we consider them in order.

The lenses of green, gray, brown shade are pleasant to wear, their eyes are not tired so much as when wearing other types of glasses.

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

The ideal option would be a mirror coating, but with the wrong wear, such glasses quickly scratch and interfere with the "view." The accessory should always be kept in the case.

Lens coating

Polarized and photochromic coating of sunglasses lenses is distinguished. Spraying plays a role, so let's look at the subtleties of choice.

Polarized lenses
The polarized coating has the best protective characteristics among all available types of lenses. A positive feature is the fact that glasses of this kind protect the eyes equally strongly, even if there is a sharp change in exposure to the sun.

For example, when driving a car it started to rain sharply.The asphalt will begin to glare, the glasses will prevent exposure to the eyes, reflecting bright flashes. The same goes for water or snow recreation.

Glasses with polarized lenses should be preferred to auto drivers. Such an accessory will prevent reflections of the 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 containing all the necessary information. It is important to find the label "polarized lenses" or "anti-reflective coating."

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

Photochromic coating
In addition to the fact that sunglasses with photochromic coating delays light, they also do not miss a certain percentage of ultraviolet rays. This quality can not boast an accessory with polarized lenses.

This option is suitable for categories of peoplewho are afraid of the light or feel discomfort from bright illuminations. To create a photochromic coating, experts resort to the use of special materials for spraying. They do not have the effect of hot heat, but are great for wearing at 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 behind the wheel at night. Due to the good reflection of light photochromic coating is ideal for skiers, when the reflection of snow greatly affects the retina of the eye.

Choosing sunglasses for driving

1. In most cases, drivers select points for themselves, based on comfort and the correct form of the rim. Such people do not follow the fashion. The accessory must completely protect the eyes from harmful ultraviolet radiation.
2. Drivers need to choose the right color lenses. Points must have a green, brown or grayish tint. Lenses of these colors are great for driving and do not create artificial glare from the road. To control the situation in this case is much more comfortable.
3. When choosing glasses on the lenses must necessarily be applied 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. Points of this quality can improve visibility by eliminating excess light. The only disadvantage of such models is that they are not available with diopters. The use of such glasses is permissible with the temporary wearing of lenses to improve vision.

Selection of sunglasses for children

1. If you decide to buy high-quality sunglasses for a child, in this case you should not save. Consider models marked “Polarized”. Glasses with special lenses prevent bright glare and refract the reflection of rays from bright surfaces.
2. An accessory with polarizing lenses blocks almost 100% of the reflected rays. Conventional 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. These glasses do not distort the image and color, they are difficult to break and scratch.For a child, these indicators are important. In case of an unforeseen situation, the baby will not get hurt by a splinter.

Selection of glasses by type of person

Round face

1. If you have a round face, it is recommended to give preference to glasses with a wide rim. At the same time, the shape of the accessory should resemble a cat's eye or a drop.
2. You should not choose glasses round strict form. You may also consider an attribute with rectangular or square lenses. Consider, such glasses will fit just not with a thin neck.

Square face

1. Holders of this type of face are advised to consider the attribute with a thin frame and an oval lens shape. Consider, when choosing points, they should not be wider than the head.
2. If you accidentally acquired points that are wider than your face, the latter will seem 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. The accessory of the correct form will reduce eyes, a forehead and will hide a small chin.
2. It is recommended to consider models with round lenses,however, the attribute should not be too large. In this case, glasses with additional stickers and decoration will not in the least spoil the look. Consider the classic style glasses.

Oval face

1. If you have an oval type of person, you are very lucky. In this case, the selection of points will not be a problem. Consider the attributes of absolutely any style. If the budget allows, you can change the attribute each season.
2. The only problem with an oval face is only that you visually need to increase the head width. It is not recommended to consider glasses with inconspicuous or narrow rim. Prefer extravagant models.

Practical recommendations

1. It is recommended to choose an accessory with a plastic frame. If you often visit the beach, metallic material in this case is completely contraindicated. Such a frame reflects the rays better, thus exposing the face to pigmentation and burns.
2. If you choose glasses not for driving, give preference to mirror lenses. The latter, in turn, better reflect ultraviolet rays. When resting on a resort with the scorching sun, you must wear glasses that will cover most of the face.
3. It is not necessary to wear an accessory with blue or pink lenses on sunny days. They pass UV light well and do not protect the eyes at all. Such an attribute is best worn 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 guarantee protection from harmful radiation. On good glasses there should be a protective film. Choose the option marked “High UV-protection”.

Video: how to choose sunglasses