Characteristics and selection of 3m goggles

Materials (edit)

Glasses are most often made from polymers. The most common lens material is impact resistant polycarbonate. It is very durable and has a slight refraction effect, so the image will not be very distorted.

Cheaper models are made from different types of polymers or plastics. These materials are less durable, but much cheaper. It is worth mentioning about the lens coatings, because they can improve the quality of vision, increase the service life or increase the resistance to mechanical damage. For example, multi-layer anti-reflective coatings allow light to be reflected more efficiently, thereby increasing comfort while working.

The goggles are also coated with hydrophobic substances, which makes the protective equipment waterproof or dirt-repellent. Metallized lenses neutralize static electricity and prevent dust from entering. It must be said about a very useful anti-fog coating for glasses, which began to spread quite recently. It allows you to use your glasses for longer without being uncomfortable or wasting time cleaning the lenses.

Best lists

In addition to the above list, there are many good points for working on a PC. Below we have presented some of them, belonging to the following categories:

• Inexpensive.
• Metal frame.
• Anti-reflective coating.

Let's move on to an overview of each model.

SPG Comfort AF024 - Inexpensive

In appearance and configuration, they are very similar to the fourth model of our top, but there are certain differences in characteristics. The size of the lens is 50 × 33 centimeters, the length of the temple is 130 mm, and the width of the bridge is 18 mm. The pads are soft and flexible.

Price: from 1085 to 1328 rubles.

SP COMPUTER EYEWEAR - metal frame

Externally, the model is of the unisex type. It has a metal, corrosion-resistant frame, transparent plastic fixing elements that are almost invisible. The lenses are distinguished by a yellowish tint due to a special coating that completely blocks UV rays, providing complete relaxation of the optic nerves. The product is available in two varieties - without diopters and corrective.

Cost: from 1400 to 1970 rubles.

Arozzi Visione VX-600 - Anti-Glare

Stylish computer glasses from the Swiss manufacturer help computer users to feel comfortable during the day. Blocks up to 50% of the blue light spectrum, helps to cope with "digital fatigue" of the eyes

These glasses have a European quality certificate and have been tested and certified by the American quality control agency.

Price category: from 3980 to 51200 rubles.

Features of ready-made glasses and to order

Ready-made reading glasses are less expensive, but they have their drawbacks. Today, there are many different options on the market in terms of design, size and power, but in rare cases, these glasses are ideal for the needs of a particular person.

The versatile glasses from renowned companies have an attractive design and excellent quality. More expensive models are distinguished by high build quality, reliability and lightness. The standard center-to-center distance in these glasses is 61-63 mm.

The quality of glasses sold on trays usually leaves a lot to be desired. Often in such models there are errors of lens refraction and interpupillary distance. Build quality and frames are often poor and materials can cause allergies.

Disadvantages of ready-made glasses

1. Finished models have the same optical power for both eyes, while most have a different degree of deflection for each (anisometropia).When making custom lenses, this must be taken into account, and the finished models are based on standards. It is impossible to use glasses where the optical power for one eye will not be enough, because this eye will get tired more.
2. Ready-made glasses do not eliminate astigmatism, but many people with presbyopia have some astigmatic disorder. Without correction of astigmatism, a person experiences headaches and fatigue, and vision will remain blurry.
3. The optical center of the lenses is located in the geometric center. All ready-made glasses are designed for an interpupillary distance of 62-64 mm. In most people, the eyes are located asymmetrically in relation to the bridge of the nose, which must be taken into account when choosing glasses. In addition, it must also be remembered that the interpupillary distance for near is always less than for distance. If the glasses do not take into account the peculiarities of the interpupillary distance and the optical centers are far from the pupils, the lateral zones are automatically used for vision, where the refractive power differs from the required one. This increases the risk of developing lens intolerance and asthenopic symptoms.
4. Ready-made models are designed to correct vision at a distance of 33-40 cm. If it becomes necessary to look at a different distance, you have to take off your glasses. Only progressive lenses make it possible to see at any distance.
5. Cheap lenses are often defective. Custom lenses are made from special materials. They minimize optical distortion, glare and other defects that can impair the quality of vision.
6. Finished glasses are usually uncoated. If the lenses are individually made, they can be covered with protection against damage and ultraviolet radiation, their light transmission can be increased, and glare can be eliminated.
7. Ready-made models are usually not suitable for people with myopia. When myopia and presbyopia are combined, lenses with less negative refractive power are needed.
8. Universal glasses have positive refraction only.

Custom made

Ready-made models are in many ways inferior to custom-made glasses. If you have astigmatism, anisometropia, eye or pupil asymmetry, it is highly recommended to buy custom glasses. Ready-made reading glasses should be used as spare because they are not suitable for driving or watching TV.

An individual order takes into account all the features of the visual system and the client's face. In the salon, they select the frame and check its fit, choose the lenses and negotiate additional services (protective coating, etc.). When making custom-made lenses, the optical power of each eye, the presence of astigmatism, the interpupillary distance, and the required lens diameter are taken into account. These glasses are comfortable, lightweight and attractive.

A photochromic filter can be added to individual lenses to protect the eyes from glare and glare, increase the contrast of vision, and reduce the symptoms of eye fatigue and eye strain. These lenses prevent the negative effects of radiation on the conjunctiva, cornea and retina.

The price of an individual order depends on the price of the frame and lens, the complexity of the work and the qualifications of the master. As a matter of urgency, glasses can be made even in a few hours.

Types of goggles

This section will describe the variety of views for specific jobs. If your work is related to chemical liquid substances, then the glasses must have the following options: face closure, glasses do not fog up during operation, glasses do not react with chemicals.

Ingress of fine solid particles. Such safety glasses are needed when working with devices such as a grinder or a chainsaw. Glasses must completely cover the face area with a face shield and be durable in case of splinters. Lateral protection is also an important aspect that must be present in such glasses.

Bright light.During welding, there is a very high probability of impairing eyesight due to the bright glow. Such glasses are called welding. They come with tinted glass, high temperature resistance, Chameleon light filter.

These criteria for the performance of tasks are the main ones that manufacturers pay special attention to.

To work with metal, the lenses of the glasses must be transparent and not fogged up. The conditions under which the glasses will not fog up are a special coating of the glasses, or side ventilation to remove condensation. But such glasses will not be able to protect chips and dust from entering the space under the mask.

If the work will take place with allergenic and chemical materials, then you should purchase glasses that will fit snugly to your face.

The new design of the glasses allows you not to throw the mask to the side, but only the lenses. This lens system and structure is called the Chameleon.

Design features of goggles

All existing goggles can be divided into several groups. The distribution takes place according to the type of material, design features and coverage area.

By lens material

Several materials are used to create protective spectacle lenses. The most common ones are:

1. Mineral glass. It has been used since the days of the USSR. The main advantages of the material are high light transmittance and resistance to light impacts (damage, chips, scratches). And the main disadvantage is the fragility of the product and the possibility of injury from splinters.
2. Organic glass (plexiglass) and plastic. These materials have lower light transmittance than mineral glass, but are much more flexible. This allows you to withstand sufficiently strong impacts, and in case of breakdowns, fragments practically do not appear. But due to the large number of scratches on the surface, the material can become dull, which makes it unsuitable for use. Therefore, the service life of glasses made of organic glass and plastic is not so long. Also, these materials are easily destroyed when exposed to chemicals and at high temperatures (200 degrees).
3. Silicone. This material is the most flexible of all. It perfectly withstands even very powerful blows, but does not cope well with minor damage. Also, silicone quickly collapses when exposed to high temperatures (sometimes it can withstand up to 300 degrees, but most often it begins to lose its properties at 200). The surface becomes cloudy over time, so the service life is also quite short.

Some expensive models use combination lenses. In them, several materials are alternated in layers.

By the way of putting on

There are also differences in attaching glasses to a person's head. You can put them on yourself in one of two ways:

• Classic with temples. When buying this model, first of all, they look at the possibility of adjusting the temples. It should also be borne in mind that during active work, glasses may fall or simply move. This can create dangerous situations while performing tasks.
• Sports. Such models are attached with a wide elastic band that goes around the head.

Some modern glasses have two attachment methods at the same time. If a special mask is provided for the work, then the fasteners can be supplemented with a small tape passing through the middle of the head.

By the size of the protected face surface

There is no official classification of glasses on this basis. But they can be divided into several groups conditionally:

• only the eyes themselves with a small space around them fall under protection;
• glasses overlap the eyes with part of the adjacent side of the face;
• the face is covered entirely with a mask or visor.

There are a huge number of models on sale now. They can both limit and increase the area of ​​protection of the nose, bridge of the nose and other parts of the face.

Largest view

There are also several subspecies of glasses with different viewing angles. They are able to significantly reduce or expand the operator's angle of view:

1. Additional lenses. These details are located at the temples of a person, they act as an addition to the central part of the lens of the glasses. With their help, it is easy to see objects with “peripheral vision”.
2. Curved shape. In such models there are no additional transparent elements, but due to the semicircular shape, they are able to expand the viewing angle on the sides.
3. Side slits. These parts are slots in the side. They slightly expand the view, but do not interfere with the penetration of additional dust and foreign objects into the eyes.
4. Wide transparent temples or frames. This subtype is entirely made of one material. If they are made with frames, then the eyes receive additional protection from debris from all sides.
5. Frontal view only. This type is equipped with the most modest overview. It protects the eyes from all directions, but reduces the ability to see from the side.

Safety glasses for working with a grinder are divided into several more groups. For example, they differ in the color of the lenses, in the ability and method of ventilation (to reduce fogging), and in tightness. Visually impaired people are allowed to use their medical model for protection. In such a situation, remember that models with diopters are not equipped with additional side protection. They cost much more, but they are not resistant to damage. Because of this, with poor vision, it is recommended to use protective glasses with lenses, or wear a medical model under them.

What reading glasses are there and at what age should you buy them

At first, a person can balance the lack of accommodation simply by moving the object in question, but over time, the very quality of vision begins to decline. In this case, the person needs reading glasses with multifocal or progressive lenses.

Types of reading glasses:

1. Single vision. They help to see clearly at a distance of up to 40 cm, so they are used specifically for reading. Using these glasses all day is ineffective and inconvenient. Single vision lenses are always prescribed as an adjunct to major corrections.
2. Bifocal. In these lenses, the upper part helps focus the distance vision, and the lower part helps to focus the vision near. Bifocal lenses enable reading and at the same time they can be used all day long.
3. Progressive glasses. In such lenses, the optical power depends on the distance of the object under consideration. The lens has two optical zones with a smooth transition between them.
4. Reading glasses lying down. The design of such glasses is reminiscent of a periscope. The person gets the opportunity to lie down and look up, but the lenses will allow him to see the pages of the book without having to bend his neck.
5. Glasses with narrow lenses. These glasses are made in the form of halves, which allows you to look over the lenses when looking into the distance.

Reading glasses may only be purchased and used with your doctor's approval. It is strongly discouraged to choose optical systems on your own, as unsuitable glasses can greatly aggravate vision problems.

The optometrist can write a prescription for reading glasses after the first eye examination, since it is possible to assess the condition of the lens and determine visual acuity in one go. However, it must be remembered that the lens will continue to lose its elasticity, therefore, it is necessary to be monitored by an ophthalmologist regularly.

Ophthalmologists recommend changing your reading glasses every five years of progression of presbyopia. Accordingly, every five years you need to buy new glasses, 0.5 diopters stronger than the previous ones. If at 40 you need glasses with one diopter, then by 65 you need glasses with 3.5 diopters. Usually, it is by the age of 65 that the lens completely loses its elasticity and acquires a stable shape, therefore, an increase in diopters is not required in the future.

Glasses for reading and working at the computer

More and more elderly people are starting to use computers, so special glasses for reading and working in front of a monitor are becoming more and more popular. Even if it is convenient for a person with presbyopia to read an enlarged font from an electronic medium, it is recommended to use computer glasses. They are especially useful if you have to use gadgets for a long time.

Computer glasses not only improve near vision, they also eliminate glare and block radiation. This allows you to increase efficiency, get rid of eye fatigue, dryness and a feeling of aches.

Thanks to a special coating, the clarity and contrast of vision are improved, the color rendition is increased, which is very important for designers and when working with graphics

Varieties of computer glasses:

1. Single vision. A versatile option that allows you to see the entire plane of the monitor.
2. Bifocal. Following the example of reading glasses, computer glasses have two zones with different diopter power. One part allows you to examine small details, and the second one covers the whole picture. The inconvenience of bifocals is the need to turn and tilt your head in order to see the text at an appropriate angle.
3. Trifocal. In addition to two zones, trifocal lenses have an additional segment, which makes it possible to clearly see the image on the monitor from a distance of 45-50 cm. This distance is considered optimal when working at a computer.

Modern optics can even offer special glasses for using tablets and smartphones, taking into account the usual working distance and working hand. These glasses prevent eye strain and rapid visual fatigue. It is recommended that you test different options before purchasing general-purpose glasses. As a rule, opticians provide such an opportunity.

For office work, you can purchase special office glasses. They allow you to comfortably read, work with documentation, use a computer and communicate with colleagues at a distance of up to 3 meters.

How to choose glasses for a computer

When buying glasses, you should check the availability of the certificate. Remember that quality lenses don't come cheap. You can give preference to manufacturers from Japan, Germany, Switzerland. Don't skimp on frames. Besides, it is better to buy custom-made computer glasses. If your eyes are not tired while working at the computer, then the accessory is chosen correctly.

Manufacturer

Many optical manufacturers are involved in the creation of computer glasses. Among the most popular are:

• Glodiatr and Matsuda, Korean brands famous for quality lenses, beautiful designs;
• Alis-96, a domestic company and its subsidiary Fashion (glasses of Academician Fedorov);
• Gunnar, Halfy, Seiko, Bradex and DeKaro.

Frame

To make it convenient to work at a computer, you need to choose a frame that is durable, with securely fixed lenses and high-quality soldering. It is better not to save money on health and buy products from popular companies. The frame should be comfortable and light so that the person does not have a feeling of constriction in the ears and bridge of the nose. Otherwise, the user will experience discomfort.

Lens type by material

The glasses manufacturing technology is improving every day. The most popular materials from which a protective computer accessory is made:

• Mineral (organic glass lenses). The main advantage of such a product is its high resistance to damage and good optical characteristics, and the disadvantage is its high weight and low strength.
• Polymer (plastic lenses). The main advantages of plastic products are high strength, reliability, lightness, safety for humans. In addition, such lenses can be made in the form of various geometric shapes (rectangular, oval, square).

Optical lens coating

Glass lenses are anti-reflective only.Polymer products can be of several types:

• Antistatic. The film on the lens surface prevents the build-up of static charges.
• Strengthening. There is a special anti-scratch film on the surface.
• Anti-glare or anti-reflective. A series of several lightening films provide a reduction in reflected light.
• Hydrophobic. This coating is smooth, which helps to get rid of moisture and dirt build-up.
• Metallized. Neutralize the influence of electromagnetic radiation.

Refractive index

Having decided on the manufacturer, material and design of the product, it is necessary to proceed to the choice of lenses by refractive index. For plastic products, it varies from 1.5 to 1.74. The higher this indicator is, the stronger, lighter and thinner the lens will be. Standard lenses are heavier than their high-index counterparts, which have an aspherical design. They are capable of reflecting 50% more light than traditional conventional lenses.

Types of computer glasses

There are no high-quality ready-made glasses for working at a computer, all products are selected individually, the doctor takes into account a number of parameters and selects spectacle lenses that are optimal for each patient.

It is worth clarifying that the lenses themselves are not computer lenses; a special coating makes them so. And just these coatings are different. For example, you may be recommended budget coatings that completely block the light of the blue-violet spectrum.

This is important when working at a computer, but you cannot wear such spectacle lenses for more than 4 hours a day, since blue-violet light is important for a full perception of the world, life, etc., its prolonged absence can cause headaches, depression, etc.

Or you can choose more expensive options for computer lens coatings that selectively block parts of the blue-violet spectrum: they block only harmful light and let the useful and necessary for the body through. Glasses with such lenses can be worn without time limits. If you work a lot both with a computer and with documents, then computer glasses will be an excellent option, the design of the lenses of which also provides for accommodation support. Such glasses reduce the load on the visual apparatus with frequent switching of vision from a computer to documents and vice versa.

Coatings to protect against the harmful light of gadgets can be applied to lenses of different designs: progressive lenses, monofocal, bifocal, office, toric, etc.

Important nuances when selecting a product

When choosing glasses for a computer, you should not consult with friends, the selection of lenses should be individual, and here the opinion of an ophthalmologist is important. Also, purchase via the Internet is not suitable, since the product must be tried on beforehand and make sure that it suits you.

It is necessary to pay attention to the frame, which should be practical and durable to wear. But you can not pay special attention to the design, since glasses will be needed only when working on a computer, they are not used in everyday life.

How to choose lenses

The lenses of glasses can be different, they have their own advantages and disadvantages:

1. Mineral - these lenses are made from glass. Their advantage is their high resistance to damage, scratches and good ophthalmic characteristics. As for the disadvantages, it is possible to distinguish high weight and low strength.
2. Polymer lenses - made of plastic. These lenses are more durable and reliable. They are lightweight. These lenses come in a variety of shapes, as they are easy to cut. However, plastic lenses cannot adequately protect the eyes from ultraviolet radiation. In this case, they are inferior to glass lenses.

Zero or with diopters?

Eyeglasses with diopters are selected by an ophthalmologist, depending on the type and complexity of the vision problem. With one hundred percent vision, zero points should be selected.But they must have a protective coating.

Coating

Glass lenses can have one single coating, which is anti-reflective. But polymer lenses are much more diverse. They are of the following types:

1. Antistatic - it involves the presence of a film on the lenses that prevents the build-up of static charges.
2. Hardening type - the film coated over the lenses prevents the formation of scratches.
3. Anti-reflective or anti-reflective lenses - These have multiple brightening-type coatings that reduce reflective light.
4. Hydrophobic type of coating - it has a smooth surface, which makes it easy to get rid of accumulated dust and dirt.
5. Metallized lenses - neutralize the influence of electromagnetic influences.

Design

The design does not play a special role, but the strength of the frame, good fixation of the lenses must be of high quality. Therefore, in order not to save on health, immediately purchase glasses from well-known and reliable manufacturers. The frame should be comfortable so that it does not squeeze the ears and bridge of the nose.