Each search engine, fisherman or mushroom picker often has to go to unfamiliar places. And after some time an urgent problem arises - how to get out of this place to the house and the car. Of course, it’s quite difficult to get lost near large cities, but even in an unfamiliar 2x2 km forest you can stray for a very long time.
Currently, there are many electronic assistants that can show the way using GPS navigation or simply by the position of the cell towers. However, all of these devices have one drawback - they require power. So, it may happen that the GPS-navigator has "drained" batteries or cellular communication "does not catch".
Therefore, such a simple navigation device as compass. The compass does not require batteries to work, and knowing how to use it correctly, you can not be afraid to get lost even in the remote taiga.
Everywhere where navigation and positioning in space is necessary, this or that type of compass is used. But we will not go into details of their types. We are interested in the simplest tourist-type compass.
The simplest compass is an iron needle mounted on a vertical axis. All this design is located in a round case. The iron arrow is a magnet. And since our Earth is also in some way a large magnet, due to some physical laws an unusual phenomenon occurs - the magnetic arrow suspended on the axis tends to turn to the Earth’s magnetic pole. Fortunately, the magnetic pole almost coincides with the geographic pole. Due to this, we can assume that the compass needle always deviates in one direction - to the north.
Knowing the direction to the north, you can determine the other three directions - to the south, west and east. And if you navigate in these directions, you can easily move around in any area without fear of getting lost - just like sailors do.
But before explaining how to use the compass, I want to make a small digression. Before you go to an unfamiliar place, be sure to study the map of this place in advance. The compass will be practically useless if you do not know the necessary landmarks or the approximate geography of the place.
Remember the approximate position and direction of all the long landmarks - roads, rivers, lakes, clearings, high-voltage power lines, etc. At the same time, outline the directions of entry and exit if you are talking about the forest. Then you will definitely know - it’s not worth going out of the forest to the west, it lasts another 50 km there, but in the north the forest is blocked by a river, and you can always go there.
We continue to learn to use the compass. First you need to choose which of these devices to purchase. Two types of compasses are mainly sold in stores - “tourist” and “for orienteering”.
Travel compass - this is the simplest “box” with an arrow and numbers in a circle.
The compass for orientation is arranged a little more complicated and is designed to move with it on the map. It usually has one or two hinged sights to more accurately determine angles relative to landmarks, and also often happens with a mirror scale of numbers.
For now, we will consider only the first type of compass.
So, in addition to the arrow on the compass, there are still numbers in a circle indicating the angle of rotation of the arrow from 0 to 360 degrees. Usually their graduation is from 5 to 15 degrees.
It is these figures in conjunction with the arrow, one end of which is usually pronounced in shape or color, and help to navigate the terrain. In this case, using knowledge of the north direction and deviations from this direction. This deviation, or the angle between the direction to the north and the direction to any landmark, is called in navigation AZIMUTH.
In practice, especially in weather forecasts, we often hear the designations - south, northwest, east, and other parts of the world. All this is also azimuths. Or a multiple of 90 degrees (north, south, west, east), or 45 degrees - northwest, northeast, southwest, southeast. In geodesy and navigation, there are other accepted designations of smaller angles, but so far they are not important to us.
What can we do in order not to get lost with the help of a compass and knowledge of azimuths? To begin with, let's determine - the azimuth of what is important to us? That is, the angle between what and the north? You need to choose a landmark.
With regard to the forest - most often you need to know the direction of how to enter the forest, and how to get out of it. It is easier to enter the forest from the road, it is from it that a good reference point will come out because of its great length.
So, we become facing the road, take a compass in our hands and look at the azimuth, that is, the angle between the end of the arrow pointing to the north and the direction of the look at the road. For ease of use, it is better to deploy the compass so that the end of the arrow matches the number 0 on the scale. In this case, the direction of the look at the road will indicate some kind of azimuth, for example - 315 degrees.
This is the azimuth of the direction of exit from the forest. And the opposite arrow (in this case - 135 degrees) is the reverse azimuth, that is, the direction of movement into the forest.
Now you can safely walk through the forest, trying to adhere to the well-known reverse azimuth.
And on the way back, you need to do the same operation - turn the compass with the arrow to the north (0 degrees), and move in the direction of direct azimuth. Thus, you will leave on the road with some offset relative to the place of entry into the forest.
To make it more clear, I’ll explain “on the fingers”. If you go into the forest to the south, then you need to go back to the north. Also with direct and reverse azimuths. The main thing is to know
direction to a predetermined landmark and where the north is.
What else can be determined using the compass - learn in the next article.
Nowadays, when satellite navigation devices have become quite commonplace, it would seem almost impossible to get lost in the forest. However, in practice this is not so. Every year, especially in the season of picking mushrooms and berries, EMERCOM employees have to search for missing people in various regions of Russia - not only citizens, but also those who consider the forest their home.
A GPS navigator is certainly a useful thing. But anything can happen in the forest: dropped, broken, etc. Therefore, the simplest magnetic device that has been known to mankind for more than a century will come to the rescue. The main thing is to know how to use a compass in the forest.
It is the simplest but most reliable device. Its principle of operation is based on the interaction of the Earth and the magnetized arrow, which, rotating around its axis, is always located along the line of the magnetic field.
In principle, using a compass is not difficult. One has only to release the magnetic needle, and after a couple of seconds it will turn north with its blue end, which usually resembles the arrowhead. The back end of the arrow (red) indicates the direction to the south. Accordingly, if you face the north, then to your right will be east, and to your left - west. It should be remembered that near power lines or the railway (as well as in areas the compass readings may be distorted.
Anyone, regardless of gender or age, may well be in a situation where it is necessary to determine their location and direction of movement, and therefore knowing how to learn how to use the compass will not harm anyone.
Checking device performance
Going outdoors and repeating how to use the compass in the forest, you need to make sure that it is working. To do this, you need:
- Place the compass on a flat horizontal surface.
- Let the arrow calm down.
- Bring any metal object to the compass to bring the arrow out of balance, and then sharply remove the object.
- Make sure that the arrow has returned to its previous position. If this does not happen, you should not use such a device.
How to use the compass on the ground
Before heading to the forest:
- First of all, you should choose for yourself those landmarks that will help in the future find the way back. In other words, you need to "attach" to the area.
- As landmarks, it is necessary to choose (road, clearing, power lines, etc.), from which you can go in any direction, but only at right angles.
- Moving a certain distance from the landmark so that it is within line of sight, you need to turn to face it, pick up the compass and release the arrow. After it stops rotating, rotate the instrument body in a horizontal plane so that the arrow points with its blue end to the inscription “C” (“N”), and in red - to “U” (“S”).
- On the compass scale, determine the direction in degrees to the selected landmark (can be done visually or with the help of some object, say, twigs). This is the direction in which later it will be necessary to return - it must be remembered. Now you can enter the forest in a direction different from that measured by 180 degrees.
How to use a compass in the forest to return to the landmark:
- Expand the compass in your hands so that the conditional line of sight passes through the center of the compass and the specified azimuth.
- Free the arrow and, rotating around its axis, achieve its coincidence with the direction "north-south".
- Move in the direction where the gaze is directed.
In order not to get lost, it is best to do periodic clarification of the route course - both when moving into the forest, and when leaving it.
Even if you know how to use a compass in the forest, you should follow a simple rule - before you go to an unfamiliar area, you need to think in advance how to get out of it. In no case should you deviate from the intended route. If this nevertheless happened - do not panic. You need to calmly understand the situation and make the right decision.
Without a compass in the wilderness, you can survive, but it is very difficult. In order not to get lost and not get lost, a topographic map and a reliable compass are not enough - you still need to be able to use them. Everyone can learn how to navigate the compass, this article will help.
How to use the compass - compass marks
Each compass has its own look and design, but they are all designed in the same way. Each compass has a magnetic arrow pointing to the poles of the planet. Let's look at what parts the compass consists of:
- Plastic transparent plate on which the compass is placed.
- The arrow that indicates the direction.
- A transparent ring on which the compass is attached (magnetic needle).
- Rotating arc around the compass.
- The arrow that rotates inside the compass.
- A non-magnetized arrow that indicates direction.
- Landmark lines.
How to use a compass - how to keep
The compass must be put on the palm of your hand and brought to the chest. This is the correct compass position for any travel. If you just need to check the map, put it on a flat surface and put the compass on top. So you can accurately navigate the terrain.
How to use the compass - definition of the parties
This is a quick and easy way to navigate the area. Look at the magnetic arrow. Suppose you go north.
- Rotate the bar scale. This is done until the magnetic arrow overlaps with the direction arrow. Both arrows should point north. After that, determine the direction of your movement. You can do this by looking at the direction arrow.
- See where the scale marks intersect with the direction of the arrow. Look at the bar scale to determine your exact direction. If the intersection occurs near the number 20, then you move 20 degrees to the northeast.
How to use a compass - the difference between the magnetic / geographical North Poles
Even considering that they are both “Northern”, you will remember the difference very quickly, as it is very important for the correct use of the compass.
The difference in readings may not be significant, but a difference of 1 degree will mean a deviation from a specific target by 100 meters with every kilometer. And what will happen if you need to go 10 or even 20 kilometers? Considering the difference is simply necessary.
How to use the compass - calculate your direction
Moving through an open area or through a forest, you must periodically determine your direction. Turn the compass so that the direction arrow coincides with your direction (wherever you go). The magnetic needle will only match if you are moving north.
How to use the compass - keep moving
Hold the compass correctly. Turn with it so that on the ticker bar the magnetic arrow points north. Move to the side where the direction arrow shows. You can check the compass all the way, just be careful not to slide the ticker bar.
How to use the compass - use landmarks
When you follow the direction indicated by the arrow, select a landmark (pillar, stone or tree). Do not select objects that are too distant (mountain) - they will not allow you to navigate with the necessary accuracy. Having reached one landmark, look at the compass and choose the next one.
How to use the compass - transfer the course to the map
Put the card on a horizontal surface and place the compass on top. The direction line should point north. Now put the compass so that it passes through your position, and the arrow points north. Draw a line along the compass passing through the point of your position on the map. Stick to this direction.
In order to quickly and correctly navigate in unfamiliar terrain, to be able to choose the shortest path and know your location, you need to regularly exercise with a compass and map, train observation and visual memory. Compass is the most reliable tourist companion, provided that they know how to use it. In order not to be in an absurd situation when you have a compass, and you got lost and do not know where to go, study our article now, sitting with a cup of tea at the computer.
Progress has provided us with all kinds of navigators, which through the satellite accurately determine their location and instantly lay the optimal route. However, they have a serious drawback, which can be fatal during a long stay in nature: they all need periodic recharging. Reliability of the compass is based on its simplicity. It consists of a round dial (limb) and a magnetic needle with two ends, one of which (usually it is colored blue) indicates the north magnetic pole. Compass has several advantages over electronic devices:
- does not need food;
- works in any weather;
- does not stray when falling;
- not afraid of water;
- weighs very little;
- takes up a minimum of space.
The only thing that can affect its operation is the presence of a large number of live iron and live wires: deposits of iron ore, railways, and high-voltage power lines.
Attention! You should not store the compass near such things as an ax, a saw, a knife, batteries, other compasses: it will be demagnetized.
Compass self-guidance: detailed instructions
The key concept for compass orientation is azimuth. This is the angle between the north direction and the direction of your chosen object. It is determined by the marking of the limb and is measured in degrees. Using a compass, you need to remember two important points:
- the arrow must rotate completely freely, and for this the device must be placed strictly horizontally;
- the arrow is equipped with a brake (arrester), and if it is stationary while rotating the device, you need to release the brake.
It is worth thinking about a safe return from the forest before even entering it. The procedure should be as follows.
- Find a large, preferably extended object nearby. It can be a road, a river, a settlement. At this object you will keep heading when you return.
- Determine the azimuth of the selected landmark. To do this, stand facing him, release the brake and, having positioned the compass horizontally, wait until the arrow stops.
- Align the tip of the arrow with the letter “N” (or “C”) on the limb. To do this, carefully rotate the device around its axis. At the same time, remain motionless.
- Now, mentally or with the help of a stick, draw a line from the center of the arrow to the landmark. Notice the number on the limb through which the imaginary line passed. This is the azimuth of return. It needs to be remembered, but better written down or marked on the map. When the time comes to leave the forest, you will need to hold the compass in your hand in exactly the same position and move in accordance with the azimuth.
Attention! Walking through the forest, you will not go in a straight line, so it is unlikely that you will go to the very boulder or tree from which you started the journey. You will be 100-200 m from it. Therefore, the longer the reference point, the calmer the beginner in the forest.
What to do if you need to get the exact route
To plot the exact route, it is better to purchase a compass with a sighting device, as well as stock up with a pencil, a map of the area, or at least a notepad. Such measures will be useful for a multi-day trip, especially if the team has children.
At the starting point, we determine the azimuth to a noticeable object: a particularly high pine, rock, fallen tree. Mark on the map or write in a notebook. We move along this azimuth to a landmark. We select the next object, again determine and record the azimuth, and so on throughout the route.
To simplify the reverse movement, each time we write down not only the value of the azimuth we determined, but also the figure opposite to it on the compass’s dial. When returning, we are guided by these opposite numbers.
What to do if the compass is still broken
Do not panic, because the compass is easy to make yourself from improvised materials. You will need a sewing needle, which is always in the tourist's arsenal, the bottom of a plastic bottle, a piece of wood bark or cork (about 3x3 cm in size) and a battery or magnet.
Saw the groove for the needle in a piece of cork. We magnetize the needle itself in one of two ways:
- apply to the magnet, and then demagnetize the second end by lightly heating with a match;
- we take it with insulated wire and apply batteries to the poles; at the same time, the tip that touches the negative pole will point to the north.
We put the needle into the groove, the cork with the needle into water in a plastic bowl. The improvised arrow will spin on the water and, having stopped, will point to the north.
When planning a serious trip to the woods or just watch the video tutorial on using the compass and remember: this device will never let you down.
How to use the compass: video
Today there are progressive glasses that use progressive spectacle lenses. These are the lenses for the glasses of the new generation. They replace two to three pairs of glasses. With the help of such lenses only glasses are made that allow you to see at all distances.
Glasses marking is a technological process necessary for ordering progressive lenses and installing them in a specific frame. When marking on glasses and in a special questionnaire, important parameters are noted, these include: vertex distance (distance from the cornea of \u200b\u200bthe eye to the glass); pantoscopic angle (angle of inclination of the rim); bending of the frame;
Progressive points require a period of adaptation. By European standards, it is considered normal when adaptation to glasses with progressive lenses is up to 1 month. All adaptation takes place in different ways. Someone can immediately drive a car, and someone needs to adjust themselves to getting used to a new, higher level of visual comfort, to understand how progressive lenses work.
In progressive glasses when looking around you need to move your head. When walking on stairs, you need to lower your head to get into the middle zone. The distance to the steps is from 1.5 to 2 meters. You can not run your eyes through the optical zones. Be sure to completely abandon the use of "old glasses".
For a qualitative adaptation period, if necessary, a psychologist is involved for more detailed step-by-step counseling and psychological support during the adaptation period to progressive glasses.
The duration of the adaptation period is from 2 to 30 days, depending on individual characteristics.
Varieties of computer glasses
Glasses designed for "computer work" have several varieties. They differ in the structure of the lenses, as well as in the presence of a special coating. The latter is called "anti-glare." The device should be selected individually after consulting with an optometrist.
Anti-glare glasses for computer
They are special optics having special polarizing lenses. The latter guarantee reliable protection against glare of light of various origins, including screen ones.
A similar glare effect can be observed not only on a computer monitor. Glare can provoke car windows, water, mirrors. Therefore, anti-glare glasses can be considered universal, as they are suitable not only for sedentary work at the computer, but also for everyday life, for example, for driving a car in conditions of poor visibility.
The effectiveness of this optics is provided by a lens of a special design, capable of not transmitting and scattering reflected light. Thus, the polarized reflected beam is not perceived by the eye, and this is extremely important for maintaining sharp vision.
Anti-glare glasses absorb the harmful blue and violet light spectrum and transmit harmless yellow, while maintaining the brightness and clarity of the image.
People with 100 percent vision can wear this type of glasses. They are a way of preventing eye pathologies. But it is necessary to coordinate this acquisition with an ophthalmologist.
Goggles for the computer with monofocal lenses
Monofocal computer glasses are also called single-focus. In this variety, the entire lens glass is an optical zone and is designed to work. This provides a wide angle of view.
As a rule, most people with healthy eyesight use this particular type of optics. It helps to adjust the distance between the screen and the organ of vision. The user does not have to make extra head or eye movements. You can view the screen completely without straining your muscles.
When using these glasses, the ciliary muscle relaxes in a person. As a result of this, the tension in the eyes decreases, blurred vision is eliminated.
Such glasses are suitable for people with good vision, regardless of age.
However, there are certain disadvantages of monofocal glasses. So, objects that are at a greater distance than the monitor will appear slightly blurry, fuzzy. This is especially noticeable to people with myopia or farsightedness.
Goggles for working at a computer with bifocal lenses
This type of lens is designed so that the top is set to focus on the computer screen, and the bottom is adapted for viewing at a small distance. These computer glasses have a visible transition separating the optical regions.
It is worth noting that when using such glasses, objects outside the screen will appear blurry. Peripheral items will look exactly the same. To focus your eyes, you have to constantly lean your head back, and focus your eyesight on the bottom of the glasses. Such specific optics can cause pain in the neck, shoulders, and headaches.
Such glasses are suitable for users with presbyopia, but are not suitable for driving a car.
Glasses for working with a computer with progressive lenses
In appearance, such glasses resemble optics with monofocal lenses. They do not have a clear line between the optical regions. However, they have three survey zones.
The upper area is for viewing objects at a distant distance. The intermediate (large) middle area is used directly during operation behind the monitor. The smallest area at the bottom of the glass helps to focus vision on objects that are close.
Such optics are considered the most comfortable for working behind the monitor, since the user can clearly see at any distance and naturally.
It is also important to note that such glasses will improve the light spectrum that hits the eye retina. For this reason, it is convenient to stay in progressive lenses in rooms with fluorescent lighting.
Computer glasses are represented by a wide range. It is quite difficult for an ignorant person to make a choice.
The most commonly used types of spectacle lenses are:
- Monofocal.
- Bifocal.
- Progressive.
There are computer glasses Fedorov. They are designed to filter out UV rays, monitor radiation, protecting the eyes from harmful spectra. Due to this, the muscles of the eye relax, and visual impairment stops. Chinese computer glasses Mastuda also protect against screen radiation, but not all models are made with UV protection. They have a low cost and a stylish frame.
Game glasses for the computer are ergonomic and lightweight. In order to create a volumetric effect, high-quality wide-angle lenses are used. There are many models designed for people with visual impairments. In these glasses, you can adjust the sharpness.
Yellow glasses for the computer have special filters that cut off the blue-violet waves, which have a harmful effect on the eyes.
Monofocal Lenses
Their principle of operation consists in directing the optical zone to the monitor. Most often they are used by people with normal vision. However, they can be selected for people with farsightedness or myopia.
Bifocal lenses
Designed so that their upper half is focused on the screen, and the lower half to correct vision at close range. These eyeglass lenses do not have a smooth transition; they have a visible border dividing 2 optical zones. This provides a person with comfortable work behind the monitor and viewing at close range, and objects in the distance will be fuzzy and blurry.
Progressive lenses
At first glance, such glasses are in no way different from monofocal due to the fact that there is a smooth transition of diopters between optical zones. These products allow a person to see at any distance. The principle of progressive glasses is that the upper zone provides clear vision at a long distance, the wide intermediate zone is suitable for working with a computer monitor, and the lower one for viewing objects at close distances.
What are the most important requirements you need to consider when you purchase anti-computer glasses? The first rule to which they must meet is the exact correspondence to the working distance, that is, the distance between the seat and the monitor. This indicator can vary significantly for each person.
Initially, polarized reading glasses may seem like a good solution. However, be careful: they are only designed to work at very short distances. For a clear view of text and images on a computer, a person is forced to approach the screen. At the same time, in turn, the user will inevitably encounter a bad and uncomfortable body position. This can cause tension in the neck and back, spoil the posture. Neither the most ergonomic chair, nor the most comfortable mouse protects against such problems ...
The next step may be progressive glasses for work, which can be worn throughout the day with the goal of a clean, comfortable, close and distant vision. They are a good choice for most common environments, at that time for working on a PC, but their effect is somewhat limited. Progressive glasses allow you to sharpen your eyesight at all distances.
The lenses for glasses are designed in such a way that their lower part allows you to see objects located nearby. Through the bottom of the lens, a person looks at the monitor. To see clearly, you need to raise your head. A longer stay in this unnatural position overloads the neck and shoulders, and also burdens the eyes over time.
In this case, anti-glare glasses for the computer will be a great choice. How do these ophthalmic "rescuers" work? Their visual zones are focused on eye movements during work. The selection of points is carried out personally, in accordance with the personal needs of the person. Computer glasses are characterized by a large field of view at close and medium distances (0.5-4 m).
There are several types of reading and working glasses at the computer, picking them up should be guided by personal needs, only then they can best protect eyesight.
They are divided by type of lens:
- The lens type is “Near.” In this embodiment, the maximum distance at which the user sees clearly is 2 m, that is, with these glasses a person is able to read documents and view files without problems. This type is ideal for people who have been working for a long time at the computer.
- Type of lens "Room". These lenses are called according to the distance at which they provide clarity and ease of vision. The maximum distance is about four meters, providing the user with convenient vision from a reading distance to the standard size of the room. The “Room” option is designed for people who are simultaneously working with clients and a computer. During movement they do not notice that they wear computer glasses; their benefit lies precisely in the ability to move without losing the quality of vision.
- The lens type is Book. These lenses focus more on the reading range at which the maximum distance is 1 meter. Compared to conventional reading lenses, which are usually designed for a fixed reading distance, Book lenses offer a much wider field of view and therefore the ability to move away from the computer for more relaxation.
- Lens Type “Individual”. This version is tailored to the needs of each individual user. The selection of points is personal, the optimal maximum distance is set to a centimeter for each person. The user's profile, his face shape and the required working distance are taken into account.
Contraindications to progressive glasses
People over fifty years old often face an extension of the blurry focus range, in other words, they are hard to see at different distances. A person cannot see objects located at a distance and focus his eyes on nearby objects. For each type of activity it is necessary to select a separate corrective optics.
Progressive glasses help solve a similar problem, they cope perfectly with age-related changes in the visual apparatus. However, the products have a number of contraindications for use:
- Anisometropia Ophthalmic disease, when the difference in refraction between the left and right eye is more than two diopters;
- Cataract. It is almost impossible to achieve stable vision correction, since the clouding of the lens develops rapidly;
- Strabismus of any origin. Pathology does not allow simultaneous movement of the organ of vision in three zones of multifocal glass;
- Nystagmus (trembling of the pupil). The anomaly causes optical distortions in different parts of the lens, it is problematic to adapt to them with such a disease;
- Individual intolerance to corrective glass.
Strabismus, nystagmus.
For the selection of progressive glasses, a relative contraindication is the presence of common diseases: diabetes mellitus, thyroid disease, osteochondrosis with severe autonomic disorders. The following eye diseases are also relative contraindications: cataract, glaucoma, macular degeneration, strabismus.
Harm of computer glasses
In general, correctly selected optics for working behind the monitor are not capable of causing any damage to the organs of vision. The benefit or harm of computer glasses will bring you, depends on how correctly you selected them. If the optics were chosen incorrectly, then this can adversely affect the eyes.
The harm from glasses for a computer is connected with the fact that they have certain features that should be selected individually for each user and for his state of vision. Also, when choosing, you need to take into account the usual distance from the eyes to the computer screen.
Anti-computer glasses can lead to undesirable consequences only if they were chosen incorrectly. Wearing such a product can cause vision problems.
Selected points should not cause complaints such as:
- Feeling dizzy.
- Feeling of pressure behind the ears, on the nose.
- The narrowing of the horizons.
- Image distortion.
The average price of glasses for a computer in the Russian Federation
The price of optical lenses for glasses depends on many factors.
First of all, it takes into account:
- Used lens material can make this product more expensive.if the refractive index is high, or on their surface there will be a coating preventing the penetration of ultraviolet radiation.
- The price of the product will be higherif the optical power indicators are high.
- The cost is significantly affected by the design of the frame.Aspherical glasses always have a higher price than traditional forms.
- Refractive index. A high refractive index provides the lenses with increased strength and minimal thickness, but the price increases.
- Prescription Purchase. Finished lenses always have a lower price than those that have to be made according to the recipe parameters. Functional coatings make this type of product more expensive.
- Eyeglass lenses have different prices, economy option can be purchased at a price of 1200 - 1700 rub.
- Mid-range glasses will cost up to9000 rub.
- Expensive models include an optical product costing from 12 000 rub.
- The choice of lenses for glasses is a crucial moment that should be taken seriously. Glasses are, first of all, a kind of optical product, it is this criterion that dominates the choice of glasses.
- Frame and design is an addition.which makes glasses a fashion accessory.
- Before heading to the optics store, you need to visit an optometrist to make the necessary types of research, and help you choose the right option for an optical product.
As a result of the analysis of such a large price range, the buyer usually looks for the average value, and based on the cost of the cheapest pair (500 rubles) and the most expensive (7-10 thousand rubles), he concludes that models in the price range of 4,500 rubles will be the most high-quality and optimal choice .
In fact, good and unpretentious male, female and children's models cost an average of 1200-1400 rubles, but the only drawback of such products is not the qualitative characteristics, but the frame (far from all, it’s a classic).
When buying in optics stores, you should be guided by the cost of 2000-2500 rubles - these are high-quality products that will always be covered by the warranty, while the selection of frames is also the responsibility of the seller.
How much do computer glasses cost in online stores?
The price of progressive optics depends on several factors:
- Manufacturer;
- Lens thickness;
- The width of the progression channel (transitional region between the upper and lower parts). The higher the indicator, the higher the price.
On average, the cost of a quality product from a popular manufacturer ranges from four to nine thousand rubles, depending on the technical characteristics. Expensive optics are available under the brands Essilor International and Rodenstock. The price of products from these companies in the region of fifteen or seventeen thousand rubles.
Less well-developed brands offer a good product with a price tag of two to four thousand. However, their life is short.
The cost of progressive glasses consists of the cost of the frame and the cost of progressive spectacle lenses:
- The cost of a frame for progressive glasses depends on the country of manufacture and the brand's fame;
- The cost of spectacle lenses for progressive glasses depends on:
- from the complexity of the recipe for glasses - diopter affects.
- from lens design (there are individual and standard progressive lenses of several types, are selected based on the recipe)
- from the lens material - the brittle material CR-39 withstands a load of 10 kg; PNX, Eyas, Eynoa materials are sophisticated, durable, withstand loads up to 80 kg, crystal clear.
- from the presence of types of coatings - water-repellent (hydrophobic - rapid sweating when the air temperature changes: street / room in winter), dirt-repellent, antistatic, antireflective (high light transmission, anti-glare), hardening coating (scratch resistance), etc.
- from the index (refractive index). The higher the index, the thinner the lens. The refractive index is 1.5, 1.53, 1.6, 1.67.
- from the possibility of staining lenses,
- from the need for photochromic technology,
- from the manufacturing country and the manufacturing company of spectacle lenses.
Medical selection with a prescription for progressive glasses and the manufacture of glasses (the work of the master) is not paid separately, but is included in the ordering process for progressive glasses.
Price range for medical frames for progressive glasses: From 1 700 rub. up to 25 000 rub.
Price range for progressive spectacle lenses: From 4 150 rub. up to 43 000 rub. (price for 1 lens).
|
Manufacturer |
Lens name |
Benefits |
Regular price for 1 lens, rub |
Stock price for 1 lens, rub |
A discount, % |
Savings, rub |
|
INDO |
Activa 1.5 Natural |
Universal progressive lens for users of computers, tablets and smartphones with extended near and middle zones |
8 900 |
7 950 |
1 000 |
|
|
Nikon |
Presio i |
Standard Progressive Beginner Lens |
5 500 |
4 150 |
1 350 |
Find out about new technologies in progressive glasses in an article by an ophthalmologist, head of the clinical optometry department Kiyko N. V. "Tablets and smartphones have changed the design of lenses for glasses."
Tablets and smartphones have changed the design of lenses for glasses.
