Anti-glare glasses how to distinguish. Differences from ordinary sunglasses. How to choose anti-reflective glasses

Long work at the computer inevitably leads to eye fatigue. Sometimes this is accompanied by tearing, reduced visual acuity, redness of the eyes. There may even be sensations of "sand in the eyes", bifurcation, headaches appear. This is caused by insufficient contrast and clarity of the image on the screen and pictures from real life. To reduce eye strain a little, many already use special glasses for the PC.

What you need to know about these glasses

Anti-glare glasses() are not only a beautiful accessory, but also perform protective functions for vision when working at a computer. They can also help when driving a vehicle or when visibility is poor. This effect is achieved thanks to special lenses that have the property filter out reflected rays of light. The sifted rays are not focused by our eyes, and visual acuity is maintained. The design of the lens of anti-reflective glasses absorbs blue rays that are harmful to our eyes, and leaves safe yellow rays.

pros use of anti-reflective glasses:

elimination harmful influence on vision from the monitor and fluorescent lamps
Creating a safe brightness for the eyes
Increased monitor contrast
Prevention of the development of myopia
Perform protective functions for the retina and lens
Reduced risk of photokeratitis
The main symptoms of eye fatigue are removed: redness, increased lacrimation

The elimination of most of these problems significantly increases the level of comfort and performance.

There are no contraindications to the use of such glasses., so both children and the elderly can make life easier for their eyes . They are especially necessary for those who spend a lot of time in front of a computer monitor and other gadgets.

Read also about anti-glare glasses for drivers.

Wear mode specifics

The principle of using these glasses is very simple, but to make it most effective, consult an ophthalmologist first.

Anti-glare glasses are usually worn when working at a computer, but many use them as fashion accessory and just wear it. There are no contraindications for this, especially since the load on the eyes is reduced when using phones and other gadgets. Some glasses can even protect from the sun's rays.

An example of anti-reflective glasses

But still, you should not immediately wear such glasses all the time. It is best to gradually increase the time for 1-2 hours a day. Thanks to this, the adaptation will be less painful for the eyes and the effect of the glasses will be maximum. This is especially true for those people who have not used any other types of vision correction before.

Eye examination and selection of glasses in.

You should not buy glasses in the market or via the Internet.

The quality of such glasses is very doubtful and you will not be able to check their documentation. It is best to contact specialized stores or pharmacies, where you can verify the quality of the materials, see the accompanying documentation, and get the necessary advice from a specialist.

Do not chase the low cost of such glasses and sudden discounts. The most important thing in anti-reflective glasses is a high-quality lens and a good frame. good materials can not be cheap, as well as high-quality performance. Individual order it can come out a little cheaper, because then it is possible to independently choose both the lens and the frame. However, it should be remembered that an inexpensive frame can ruin whole glasses. If it breaks, you will either have to order it again, or even buy new glasses.

If you experience any discomfort while using glasses, you should immediately consult a doctor! Most often this occurs due to improperly selected glasses or poor-quality materials.

Special case and napkin

Any glasses do not have an expiration date, but their life expectancy directly depends on proper care. Observing simple rules, You can always enjoy your favorite glasses.

Proper lens care can be found at.

So, for glasses you need special case. It will protect them from damage while you are not wearing them. With a case, they will not break or be scratched in a bag, they will not break when dropped. This inexpensive accessory will significantly increase the life of your glasses! In the case, you can also put special napkins for wiping.

For cleaning, use only special wipes. Most often they are made of microfiber, but there are also disposable ones. Only they gently clean the lens without scratching it. This is especially important when using glasses with special coatings.

Any damage to the coating - and the glasses will become unusable.

In case of strong dust or contamination, you can rinse the lenses with warm soapy water. Never use ammonia, bleach, vinegar, glass cleaners. Only special solutions purchased in optics. It can remove the toughest stains without harming your glasses. Some have antiseptic and antistatic properties, so dust and harmful bacteria You will not be afraid. Unsuitable chemical substances may damage the coating and frames. After that, you will have to say goodbye to the glasses. And if such a solution gets into the eyes - Inflammation is unavoidable.

Application polarized glasses due to the fact that the sun is the enemy of motorists. Its activity has a significant impact on the driver's well-being, on his attention and reaction speed. It should be noted that even a simple sunbeam can lead to an accident with lethal outcome. Therefore, glasses for the driver are necessary.

Where should danger be expected while driving?

AT sunny weather most dangerous time the interval from 11 am to 4 pm is considered. The light at this point is the brightest, and the ultraviolet radiation is harder. In the morning and evening time its intensity decreases. However, at the same time, the light begins to hit directly into the eyes of the person who is driving. It hits a person's face at an angle of 45 degrees. The driver starts to squint. Due to this, the viewing angle is reduced. If you do not use special glasses for the driver, then the obstacle can be seen only 5 meters from the car.

Regular visors, used as sun protection, do not help in all situations. They will not be able to secure in the situation when the rays are reflected from the wet road. Naturally, direct light in this case does not pose any danger. But wet asphalt acts as a mirror, reflecting the sun's rays. Accordingly, neither the visor nor the special protective strip on the glass can help.

The danger is not only wet asphalt, but also straight windows, which are equipped with oncoming trucks and buses. You can go blind for a moment when leaving a dark place. It is a garage, a tunnel, an underground parking. If the driver does not see anything, then you should turn on the emergency gang, stop without changing lanes, and wait until your vision is fully restored.

Those glasses for the driver that do not have special UV protection can lead to complete loss vision. What is it connected with? A stream of light with the presence of ultraviolet in it will enter the retina of the eye. This can cause a burn, which, in turn, will lead to a significant decrease in vision. In such a situation, you can be completely blind.

Improve vision with glasses

Nessesary to use polarized glasses for drivers who have a special filter. Reflected light will scatter in them. Accordingly, the review will improve. A special layer, located in the center of the lens, will cut off the reflected light, making it so that the glare almost completely disappears. You can buy polarized glasses for drivers in automotive stores, in specialized departments for fishing and recreation, in pharmacies. In addition, they are available to order online. These glasses make you feel more comfortable. In addition to glasses, you should think about the purity of the glass, which glares quite strongly when dirty. It must be washed constantly.

An essential element for a comfortable ride

Special goggles for drivers have only recently been able to cause only a skeptical smirk. At first glance, they did not differ in anything so special from simple, sunscreen ones. In reality, things are a little different. Experts recommend purchasing glasses adapted for driving in conditions of poor visibility and in too intense light. In order not to make a mistake when purchasing glasses, you need to seriously approach the choice. Some design features require attention.

What should be the frame?

What should you pay attention to first of all when purchasing anti-glare glasses for drivers? The frame must meet some basic requirements. Wearing glasses, the driver should feel comfortable, not experience any negative feelings. Glasses that are fully suitable for drivers do not squeeze the temples, the bridge of the nose. It is necessary to choose those that do not constantly slide to the tip of the nose and do not cause irritation or discomfort. In other words, the glasses should not distract attention from the road. The ideal frame is characterized by lightness. It is not wide and has narrow ears. There is a nose pad. The ends of the temples in this frame are made of rubber. You should pay attention to how the ear hooks are attached to the frame. Compared with regular glasses they must be fixed to the top or to the bottom of it. Due to this, the field of view of the driver will not be limited.

What should be the lenses?

When choosing anti-reflective glasses for drivers, attention should also be paid to the lenses. They can be made from materials such as plastic or glass. Both of them are able to provide the same comfort. But glasses with plastic lenses are safer. This is due to the fact that during an accident they do not injure the eyes.

If we talk about a special coating for lenses, then on present stage there are several different options. In specialized stores, the driver can be offered anti-glare glasses, glasses with gradient tinting. You can also purchase those that are great for driving in poor visibility. There are quite a few options.

Glare from oncoming vehicles, from wet roads, from windows and windshields, from chrome and other shiny surfaces, is quite common cause road accidents. Glasses for drivers have an internal anti-reflex coating, which reliably protects the eyes from various glare and from excess sunlight.

Practically the same function is taken over by the glasses already liked by most drivers, which have gradient toning. In them top part lenses are as dark as possible. It has a mirror finish. In the direction from top to bottom, the intensity of dimming decreases. It turns out that the human eyes are protected from bright light and from glare. Through lower part The dashboard lens is quite visible.

Models that are necessary for driving in low visibility

In addition, you can purchase such glasses for drivers that are suitable for driving in low visibility. For example, during snowfall or heavy rain. The lenses in this kind of glasses are painted in yellow, orange or red. They block blue-violet rays. Glasses of this type help to increase the contrast, as well as improve the color perception of the surrounding components. The level of absent-mindedness and drowsiness decreases, since its causes are quite often visual fatigue. The lenses on the driver's glasses (yellow, orange or red) contribute significantly to reducing headlight glare from oncoming vehicles.

Models for visually impaired drivers

But many people have poor eyesight. Is it possible to find glasses for drivers with diopters? Regardless of what many glasses apply plain lenses, there are also models that are suitable for people with poor eyesight. Many experts offer to purchase glasses that are equipped with optical glasses with special anti-reflective tinting. At the time of manufacture of such models, a polarizing coating is applied to the lenses. After that, they are darkened.

Additional funds

It is required to purchase not only glasses for the driver (night, anti-reflective, with gradient tinting). Naturally, they will help reduce eye strain by protecting them from blinding and bright sunlight. But they protect from the outside. Therefore, you should purchase those tools that will help protect your eyes from the inside. It was found that with the help of a substance such as lutein, it is possible to reduce the recovery time of vision after being blinded by the sun's rays or headlights of oncoming vehicles in dark time. The reception of this device can improve visual acuity, the level of color perception. Eye fatigue after a long stay behind the wheel will be reduced.

How to find the best option?

In order to determine which glasses will be optimal for you, you should visit specialized stores or optics. Need to try on a few pairs. You can also consult with experts. But it should be understood that even the most best models will not be able to eliminate the need to observe the utmost care while driving. Regardless of whether you have anti-glare glasses or anti-glare glasses for drivers or not, you must follow the rules of the road.

What can glare influences lead to?

Bright sunlight, blinding light from oncoming headlights ... These factors can cause not only eye fatigue, but also lead to the occurrence of diseases. For example, glaucoma or cataracts. In order to protect drivers who spend most of their time behind the wheel, special glasses have been created. Consider what are their distinguishing features.

There is an opinion that academician S.N. Fedorov. He designed relaxation-combination glasses that protect the eyes from excessive light.

What models are the most popular? Driver reviews

The Cafa France driver's polarized goggles also protect the eyes. Judging by the reviews, this is the most popular brand. They were designed specifically for drivers. They should be worn while driving. adverse conditions for vision: in bright sun, glare from asphalt after rains, at dusk. They will also help with blinding light from the headlights of oncoming vehicles.

Principle of operation and distinctive features

Why do drivers respond so well to these models? Lenses in glasses of this kind are special light filters made of fairly high-quality plastic or mineral glass. They are covered thin layer material that creates polarization vibrations. These waves act only in the perpendicular direction of radiation. In other words, glasses are not only comfortable, but also provide high eye protection.

Ordinary light includes unpolarized waves. This is due to the fact that its atoms move freely in space. In order to change and order their structure, special linear-unidirectional polarizers are used. They contribute to the release of radiation from ordinary light, which subsequently pass in a certain direction of oscillation.

At the interface, some of the rays are reflected. The rest are broken. The vibrations of those rays that were reflected are basically perpendicular to the plane on which they fall. At a certain angle of incidence, the reflected rays become linearly polarized.

Advantages

Cafa France driver glasses contribute to:

A significant improvement in visibility in fog, during precipitation, at dusk, etc.
Reduced brightness from the glare of oncoming vehicles.
Reducing the degree of fatigue and drowsiness.

Mostly anti-reflective lenses are marked special sign AR. They are from simple glasses differ:

Full delay of ultraviolet rays.
Optimization of the intensity of the sun rays that are passed through. Increases the degree of clarity and contrast of the visible image.
Good restoration of the normalized state of the eye tissues.

How good is yellow lenses?

What can you say about the color that the glasses for drivers have? yellow lenses, judging by the reviews of numerous drivers, are the most preferred. But it's not. It is not worth wearing this kind of model all the time. Naturally, they contribute to the improvement of contrast. But due to them, there is also a change in color and spatial sensations. This is especially evident if the windshield is not in a perfectly clean condition.

Mostly yellow have night anti-light goggles. For the driver, it is in the dark that they are optimal, as they contribute to brightening the image, making it clearer and more contrasting. These models are also popular with fishermen and hunters. However, they are suitable for all sports lovers.

Are glasses with different lens colors so good? Reviews of specialists and drivers

Except yellow color lenses can be black, clear, brown or grey. In addition, they can be anti-reflective or night, day or diopter. Each individual model is designed for certain conditions and state of vision. For example, if there are visual impairments, then it is better not to use polarized glasses. In such situation the best option are "chameleons" that are able to adapt to the lighting.

What other nuances differ in driver's glasses? Reviews of many experts argue that it is best to abandon those models whose lenses have a purple or blue tint. It is believed that they entail the development of diseases of the lens. Pink lenses contribute to headaches and nerve problems. Dark ones perfectly resist direct blinding rays, reflections from wet asphalt and glass.

Which glasses will not tire your eyes?

To a lesser extent, the eyes will get tired in those glasses, the lenses of which have a green, gray or brown tint. But you still shouldn’t use them constantly, as they also change color perception. It is best to use them in the dark or in cloudy weather, as they make the image brighter, clearer and more contrasting.

So that your eyes do not get tired while driving at night, you should set the headlights to the middle position. In the event that due to them the wheels or the glass of the trunk of the vehicle that goes in front are illuminated, then the eyes will begin to strain more. The light beam needs to be directed slightly above the bumper of the car in front.

When choosing glasses, you should focus primarily on aspects such as security, safety and comfort. In addition, they must fully comply with the image of their owner.

Conclusion

In this review, we examined the main nuances that characterize driver's glasses of the night, anti-glare, polarized type. We hope that this will help you make a choice in favor of the optimal model.

Anti-glare glasses are an accessory that is equipped with special polarized glasses. As a rule, they are not used for everyday wear, but can be very useful in certain cases.

In particular, glasses with anti-reflective coating can provide reliable protection organs of vision from glare emanating from the monitor screen, the surface of the water or the windshield of the car. In addition, this device protects the eyes and from the negative impact. ultraviolet radiation, as well as blinding headlights of oncoming cars.

How does anti-reflective coating work on glasses?

The mechanism of action of anti-reflective lenses for glasses is to screen out reflected light and leave only safe shades of the yellow spectrum. Such glasses completely absorb blue rays, which are more annoying than others. human organs vision, as a result of which they are simply not fixed by the eye.

This feature of this accessory is very valuable for drivers of vehicles who are constantly in conditions heightened danger. In some cases, it is the glare of light that causes blinding of people behind the wheel and subsequent accidents, so the use of such devices in such a situation becomes very important.

In addition, men and women who spend most of their time in front of the monitor screen, may also experience negative impact light glare. To avoid exposing your eyes increased load, they are also advised to wear specially coated accessories while working.

When a person additionally has certain, he can purchase anti-reflective glasses for vision, which not only protect the eyes from negative factors, but also correct the existing violations. Nevertheless, in most cases, men and women prefer anti-glare computer glasses or sunglasses with appropriate coverage for driving.

How to choose anti-glare sunglasses for drivers?

In order to choose the most suitable accessory, it is necessary, first of all, to decide on the color of the lenses. Take advantage the following recommendations to help you make the right choice:

for drivers with perfect vision who intend to use anti-glare glasses exclusively for driving a car, the best choice considered an accessory with gray lenses. The dimming ratio in this case should be 70-90%;
for those who constantly experience eye discomfort from traffic lights and brake lights, goggles with green lenses are suitable;
finally, anti-reflective glasses with lenses of yellow or brown shades are considered a universal device. They significantly reduce the light output from oncoming vehicles, improve visibility in bad weather and do not tire the eyes. In addition, such an accessory can be used for working at a computer.

Meanwhile, lenses are not the only important element anti-reflective glasses. Certain requirements apply to the frame, namely:

the frame should be as comfortable as possible for its owner;
goggles should fit snugly around the ears and;
the frame should not be too loose so as not to fly off at the most crucial moment, but also should not squeeze the face;
if your face fits glasses with temples attached to the bottom or top of the frame, opt for this model - it gives the maximum viewing angle and does not limit peripheral vision.

Visual discomfort caused by regular use of a computer is called computer visual syndrome. It is diagnosed in 70% of people who work in front of a monitor for three or more hours a day. Anti-reflective glasses with regular use will help to avoid the development of myopia, hyperopia and astigmatism.

The effect of monitor radiation on the eyes

The reasons for this phenomenon lie in the peculiarities of the perception of the monitor by the human eye. When we read printed work, text and pictures are sharp, but the monitor includes a lot of flickering pixels. Therefore, the text on the monitor does not seem clear enough to the eye.

Focusing the eye is also difficult because the pixels near the center of the screen are brighter than those located at the edges. This dissonance causes fatigue visual system. In addition, vision is affected by the intensity of the glow, font features, the location of information blocks, colors, and even the position of the monitor.

In order to prevent deterioration of vision, you need to constantly follow the rules of working at a computer, monitor your posture and the location of the monitor (60-70 cm from the eyes). Every hour you need to take a break, do gymnastics for the eyes. To avoid drying out of the mucosa, you can use moisturizing drops. For a prescription, you need to contact a specialist.

Using even the most protected and modern monitor, a person still blinks 2-3 times less than usual. This leads to the drying of the cornea and the formation of microcracks. The presence of lesions in the mucosa causes discomfort and over time provokes a decrease in visual function.

Even with a slight deterioration in vision, you need to undergo an examination and find out the cause. If the deterioration is due to computer use, you can purchase special glasses that minimize harm.

The difference between polarized and anti-reflective glasses

It is noteworthy that even in optics salons, these types of optical systems are often confused. In order to understand these concepts, you need to know what glare is. And glare is a spot of light that is observed on a convex or flat glossy surface that reflects light. It turns out that any surface can create glare (at a certain angle, as well as with proper lighting), even the lenses of glasses.

The polarization of light is a more complex concept. It occurs when light hits a surface at a certain angle, is reflected and propagates predominantly horizontally and vertically. Vertical polarization of light conveys information about colors, contrast, and so on to a person, while horizontal polarization creates noise, glare, interference, and blind spots. And the higher the ability of the surface to reflect light, the stronger the glare will affect vision.

Glare occurs at any time of the year. This occurs when light is reflected from snow, water, and even in foggy conditions. In conditions of poor visibility, glare reduces visual acuity by distorting colors, shapes, and contrast. All this provokes eye fatigue and corresponding discomfort.

It is noteworthy that the reduction in light intensity through the use of sunglasses does not reduce glare. To reduce the negative effect of glare from horizontal surfaces, only polarized lenses that have a polaroid coating. The principle of operation of glasses is hidden in a transparent polarizing film that blocks reflected rays.

Polarized glasses eliminate glare and allow you to see the world clearly without damaging the eyes. These glasses are recommended when driving vehicles as bright reflections can dazzle.

Anti-glare glasses are a different concept, since an anti-reflective surface means one that has almost no shine and no glare. It is correct to call anti-reflective those lenses that have a special coating that makes the optical system more transparent. Such glasses are also called enlightened or anti-reflex.

Anti-reflective lenses are designed to transmit light and reduce the reflection of light directly off the glasses. Thus, image contrast and visual acuity are increased. If you look at a person who wears such glasses, you can see his eyes, and not a reflection in the glasses. It turns out that anti-reflective glasses let in more light, without giving reflections, and polarized glasses block reflections, letting in less light.

The principle of operation of anti-glare glasses for a computer

The computer screen emits the entire spectrum of light rays, but mainly violet and blue waves overload vision. They are part of the ultraviolet radiation. It is also noteworthy that short-wavelength rays are refracted and scattered halfway to the retina, making way for green and yellow long-wavelength rays, and therefore often the image on the screen seems blurry. Interestingly, red rays are very useful, they restore metabolic processes in the eye tissue.

The benefit of anti-reflective computer glasses is that they block violet and blue rays, protecting the retina and lens from ultraviolet radiation. Similar optical systems protect your eyes from electromagnetic radiation from the monitor, as well as glare and excessive brightness.

Computer glasses are designed to let through the red and orange parts of the spectrum, which have a beneficial effect on the organs of vision. They also block shortwave - harmful - rays. Thus, contrast and color perception are increased.

Anti-glare glasses reduce drowsiness and increase efficiency by 30% (by reducing eye strain).

Indications for the use of anti-reflective lenses

In appearance, computer glasses do not differ from conventional optical systems with diopters. However, upon closer inspection, you can see green, blue and purple overflows on the surface of the lenses. This is due to the fact that a filter coating is applied to the glasses of computer glasses, which reflects glare - the cause of reduced vision when working in front of a monitor. Also, computer glasses have an antistatic layer that does not allow the glass to be magnetized.

If the patient has reduced vision, doctors usually prescribe anti-reflective glasses with diopters. It must be remembered that such glasses do not protect the eyes from negative impact completely, so you need to periodically take breaks from working at the computer. To minimize harm from the monitor, it is enough to give your eyes a rest for fifteen minutes every hour. For these purposes, you can install a special program on your computer that will remind you of the need to organize a break.

Computer glasses are shown to those people who spend more than three hours a day in front of the monitor. Similar optical systems are allowed for both adults and children.

Indications for the use of anti-reflective glasses:

regular and long-term use of equipment with screens (phones, tablets, computers, etc.);
tendency to dry out mucous;
feeling of pain or burning;
tearing;
photophobia;
redness;
chronic eye strain.

Patients note that when wearing anti-reflective glasses, their performance increases due to the fact that eye fatigue is reduced. With use, dryness and burning disappear, as well as pain during overvoltage. It also reduces the frequency of headaches and dizziness.

How to choose anti-glare glasses for work and life

You should always remember that even with minor health problems, it is always better to consult a doctor. Despite the simplicity and safety of anti-reflective glasses, it will be better if they are prescribed by an optometrist. This is due to the fact that during the examination, the doctor can identify a serious deviation and prescribe treatment in time. Pain and redness often accompany inflammation of the eyes.

When choosing anti-reflective glasses, you need to consider the following factors:

Frame characteristics. For your own comfort, you need to choose a frame that will fit the shape of the face and the taste of the patient. You also need to make sure that the frame does not put pressure on the bridge of the nose or ears.
Image quality. Glasses should not distort the picture, increase or decrease objects, narrow the horizons.

When the patient does not have vision problems, the doctor can prescribe ordinary "pacifiers", the glasses of which will be coated with a protective anti-reflective layer. Anti-reflective lenses are made of plastic and glass. Plastic ones get scratched quite quickly, but they are recommended for children, because they do not break into fragments under pressure and do not injure the eyes.

Types of lenses for anti-reflective glasses:

Monofocal. Thanks to such lenses, a normal perception of objects without size distortion is ensured. Such optical systems are suitable for people with normal vision. Their task is to reduce eye fatigue, they prevent the deterioration of vision and even a violation of posture. Thanks to monofocal lenses, headaches and discomfort in the neck disappear. These glasses are most often prescribed to young and old people.
Bifocal. These lenses have two optical zones: the upper one is designed for studying objects on the monitor, and the lower one helps to see objects at close range.
(progressive). These lenses have three optical zones for different mode work (computer, near, far). These glasses provide the most comfortable use of modern technology.

When choosing glasses, be sure to study the documentation for the product. So you can save yourself from buying a fake, which is quite capable of being harmful to the eyes. The goods of German, Japanese and Swiss manufacturers are recognized as the highest quality. Chinese lenses are less effective and durable, but are sold at an affordable price.

It must be remembered that even the most expensive monitor does not provide eye protection. Therefore, anti-glare glasses will be indispensable for anyone who spends a lot of time in front of a computer or TV. You can always choose a frame that will make glasses not only useful, but also stylish.

Features of anti-glare glasses for drivers

If we talk about drivers, anti-glare glasses help them recover their vision faster after being blinded by the headlights of oncoming cars. However, such lenses (with the addition of diopters) are recommended only for drivers with reduced vision, since in normal vision, any lenses reduce light transmission. Drivers will benefit from polarized lenses that protect against glare, but should not be used at night or in bad weather.

Anti-headlight glasses will be much more effective when driving. They include yellow or yellow-orange lenses that delay Blue colour. These glasses can be used at night and in bad weather, as they increase the contrast of the image.

Given all of the above, we can conclude that all computer users need anti-glare glasses. They will not only save you from discomfort and eye fatigue, but also avoid serious violations vision.

Everyone who has ever bought glasses in optics stores, faced with the question of choice frame lenses. Usually, at this stage, consultants begin to pour, as it were, in simple words - multifunctional, anti-reflective, photochromic, and so on. But my experience of communicating with buyers says that most of them do not really delve into the meaning of these words (on the contrary, many people want to delve into it), but they confuse them intensely, think out the meaning, and in the end they buy not at all what they wanted.

But what are all these words about? It's about about coatings spectacle lenses . So, in simple and understandable words, let's put everything in its place.

The vast majority of modern spectacle lenses are made from various polymers, in other words, from "plastic". They do this both for economic reasons and for practical reasons. unlike mineral (glass) lenses, it is more difficult to break a plastic lens, besides, plastic is suitable for installation in now fashionable rimless frames.

But there is one objective minus - the optical properties of plastic (even special, so-called optical) lose to the optical properties of glass. In order to reduce the difference in optical properties, the first coatings of spectacle lenses were intended.

Anti-reflective coating- designed to improve the light transmission of the lens. It is also called antireflex or enlightening.

Why is it needed at all? The fact is that when passing through any transparent material the luminous flux loses part of the light. You probably remember from physics an expression like "the angle of incidence equal to the angle reflection". So, because of this very reflection, part of the luminous flux is lost (simply reflected). The task of the anti-reflective coating is precisely to "return" the reflected light back. Without going into the technical jungle, I will say that the main thing in the anti-reflective coating - this is the number of layers.The percentage of light transmission depends on them, and therefore the price.

How important is this coverage, and is it necessary to overpay for it? My opinion is that without this coating it is simply impossible to buy lenses. If it is not possible to take premium coverage, you need to take at least the simplest one, but make sure to have it. Why? Yes, because the amount of light that enters the eye is the main parameter that affects eye fatigue.

There is one common misconception- that anti-reflective lenses eliminate the glare we're looking at. For example, glare from water, from cars, etc. This is fundamentally not true! In fact, many (and even many optician consultants) without understanding simply confuse the anti-reflective coating with a polarizing filter.

hardening coating- there is the least confusion)) But there are several misconceptions. Namely, the hardening coating makes the lens super strong! This is not true. This coating will protect against minor scratches, such as when you place your glasses on a table with the lenses facing down. But if you decide test the lens for strength with a nail, then perhaps the lens will lose to the nail.

Water-dirt-repellent coating- the main task is to prevent pollution. Fingerprints, water drops, etc. are much smaller and less likely to remain on such a coating. Water repellency is achieved by increasing the wetting angle. Actually, the price depends on the wettability angle of the coating. The angle is larger - the price is higher. The lipophobic (fat-repellent) layer is responsible for dirt repulsion. Thanks to this layer, the lenses are much better cleaned, and in general they are much less likely to get dirty.

It is this coating that makes eyeglass care easier and unobtrusive. Lenses with such a coating, even when dirty, are much easier to clean. And since by anti-reflective coatings the technological limit has almost been reached (premium class coatings transmit about 98-99% of the light), then the main battle of technologies has now unfolded precisely on water-dirt-repellent coatings.

When a lens has all three of these coatings, it is called multifunctional coating . Still talking multicoating. As you already understand, depending on the number of anti-reflective layers, contact angle, and strength, multi-coatings can cost very differently. The difference in price for the same lens with different multi-coatings can be 2-3 times.

What then to take?

My advice here is pretty simple. This is exactly the case when the more expensive, the better. Therefore, you can afford the most expensive ones - take them. Even if you need glasses "only to read" one hour a day. If there is not enough money, then ... then it's better to save on frames! Of course, no one will see how expensive your lenses are, but Your eyes will thank you!

There are several more covers. For example antistatic, photochromic, polarizing. But about them another time.

That's all for today.