In Which Direction From The Monitor Is The Harmful Radiation
Is the radiation from a computer monitor, tablet screen and phone harmful?
Electromagnetic radiation threatens, mainly, those who are recently sitting in an embrace with an old huge “monitoring”, pictured here. And almost no one has such. But here are some more important tips. Which, for all their simplicity, can really save your health and vision.
The main problem of modern LED displays (including smartphones) is the blue glow, which accelerates the aging of the body, as scientists have found.
Long-term exposure to blue light emitted from a phone, tablet, laptop or computer screen can damage the retina of the eyes and accelerate aging, scientists at Oregon State University warn. The study was published in the journal Aging and Mechanisms of Disease.
The solution could be e-ink screens without backlighting, like most e-books. It is a pity that computer monitors of this type are still small (12 inches) and too expensive (from 60,000 rubles).
And, of course, you need to protect your eyesight:
1. While working with the screen, take breaks of 10-15 minutes every hour, relax, look into the distance. LED lamps directly in the eyes of anyone Not yet helped to save eyesight.
2. Do EYE EXERCISES (rolling your eyes, etc.).
3. Install the free program Ascendic Night Shift (or Blue Light Filter, or F.lux).
Such a program makes it much easier for the eyes to work with the monitor. For example, to install Flux on a computer, and Ascendic Night Shift on a phone, my eyes were very tired after 10 minutes of working on the screen. And so I installed this application. I even forgot about the old pains in my eyes, not experiencing them anymore. The program makes the image on the monitor warmer (in terms of color temperature), and it becomes more suitable for vision. Other people using similar programs write the same thing.
4. MOVE! Sitting motionlessly in front of a screen for a long time is worse than any radiation. It is fraught with fatigue, hemorrhoids, osteochondrosis, diabetes and others. “charms”.
This problem can be solved by taking regular breaks. Do simple exercises, go outside more often, breathe fresh air. Working for a long time, change the position of the body, get up, walk around. In your free time, walk more, play sports.
NOW own ABOUT radiation
1. Regarding “x-ray” radiation from monitors, then his face can not be afraid.
AT “ancient” monitors on cathode ray tubes (CRT), it is within normal limits, and in liquid crystal it does comment.
2. But the electromagnetic field should be taken more seriously. The electromagnetic field of the cathode-ray monitor (see Figure) is large enough and therefore harmful to health. This is especially true for pregnant women. Some experts believe that the electromagnetic field can adversely affect the embryo, starting from the moment of conception and throughout the first months of pregnancy.
For such a monitor, the field extends to the sides and especially backward from it to a distance of 1-1.5 m. (Therefore, according to the rules, no one should sit behind the cathode-ray monitor).
The overwhelming majority of you have a liquid crystal monitor for a long time, and although it also creates an electromagnetic field, it has not been intense and harmful for centuries, as in electron-beam screens. Therefore, in terms of safety, liquid crystal is preferable.
What to do if you have to work specifically on a cathode-ray monitor, like the one shown in the figure?
First, a TCO-95, TCO-99 or later compliant monik is preferred. Such monitors have built-in protection against electromagnetic radiation (built-in protective shield, special foil inside the case), and therefore they are almost safe. However, for this protection to work. The CRT box must be CORRECTLY grounded. Therefore, if you want to protect yourself from the electromagnetic field, call an electrician to properly ground your monitor. Grounding does not have to be done on the worker “zero” power system, battery or water pipe!
Computer radiation and pregnancy
Pregnancy is an extremely important time in a woman’s life. From the moment of conception to the birth of the child, the growing fetus is extremely sensitive to adverse external influences. Therefore, intrauterine damage to the embryo by an electromagnetic field can occur at any stage of its development. Especially dangerous in this regard are the early stages of pregnancy, when miscarriages most often occur and malformations of an unborn baby develop. Therefore, the expectant mother should be very responsible about the influence of computer radiation on pregnancy.
Despite the compactness of the laptop, radiation from it during pregnancy is no less dangerous than the same effect from a regular computer. the intensity is the same, plus the effect of the Wi-Fi transmitter. In addition, many women, even during pregnancy, DO NOT part with the habit of holding this portable device on their lap, that is, in the immediate vicinity of a developing baby.
What is the harm of computer radiation
We are the first generation of humans to live in an ocean of vast amounts of visible and invisible radiation. Therefore, there is still no reliable statistics that summarize all the studies of scientists on this topic. So what do the pundits say?
Each PC is source of low frequency and radio frequency radiation. Health experts say:
- both types of rays are carcinogenic;
- they increase the risk of cardiovascular disease and hormonal disorders;
- as well as Alzheimer’s disease, asthma and depression.
All parts of the computer can be harmful. The processor generates this very microwave radiation, which “with pleasure” spreads in space in the form of electromagnetic waves, often carrying misinformation, to the human electromagnetic field.
To determine in which direction harmful emissions are greatest from the monitor, remember that the front of the monitor has a protective cover. But the back wall and side surfaces are NOT protected. Manufacturers of computer equipment considered ensuring the safety of the operator sitting in front of the screen as a paramount task, therefore the opinion that the radiation from the monitor behind and from the sides is stronger is quite reasonable.
Monitors with a cathode-ray tube, thank God, are becoming rarities of history. The harm from them was very significant. The LCD monitors that replaced them are certainly safer, but they still emit radiation. By the way, the word radiation, indicated in the computer documentation, is translated as radiation, but not as radioactivity.
Due to heating of the motherboard and case, air is deionized and harmful substances are released into the environment. This is why the air in rooms, with computers constantly running, is very hard to breathe. For people with a weak respiratory system, such a factor can have a detrimental effect, provoking asthma. It is further aggravated by the influence of the electrostatic field of a computer and monitor on dust particles suspended in the air. Electrified, they form a “dusty cocktail” that makes breathing difficult.
Having a touch screen does NOT guarantee you no radiation at all. After all, your fingers, performing manipulations on the screen, are in contact with it all the time, and a few millimeters from the wi-fi antenna.
Special attention should be paid to the problem of radiation from a laptop, which were conceived as portable devices for work on the road. The use of THESE convenient and multifunctional devices during a full working day may well become a prerequisite for all kinds of pathologies and diseases. After all, he, like usually a computer, is source of electromagnetic radiation, moreover, it is in the immediate vicinity of a person. Many users even inadvertently place it on their knees, in close proximity to vital organs.
Ways to protect against harmful effects of your computer
The Flip side of technical progress is the dangers associated with it. How can they be avoided or at least minimized? How to reduce radiation from a computer? Information about its harmful effects should logically be accompanied by recommendations on how to protect against its radiation.
- Since the maximum radiation level is located in its rear panel, the distance from it to the back of the second user does not have to be less than 1.5 m.
- Reduce the length of the power wires as much as possible.
- The monitor should be located at a convenient distance for sight, and the system unit should be as far away from the user as possible.
- To level the radiation from the walls of the monitor, place it in the corner of the room.
Wet cleaning of the room and the presence of an ionizer will serve as additional protection against electromagnetic radiation from the computer.
Is radiation from a computer harmful?
The computer is one of the most remarkable achievements of human intelligence. The possibility of direct dialogue between users through computers and huge PC resources, has led to the fact that millions of people spend more and more time in front of his screen. Over time, a set of certain complaints about well-being appears in computer users.
This makes us think about the effect of radiation from a computer on human health. There are many reasons for this. A number of scientists associate health problems with the exposure of people to electromagnetic radiation from household microwave sources.
Do plants help protect against computer radiation?
Even among reputable office workers, there is an opinion that some plants protect against computer radiation.
So which flower protects against computer radiation? The cactus is traditionally preferred here. Under this myth even summed up the “scientific basis”: the needles of the plant are attributed to the role of antennas, formulas are given and calculations are made. If there was a grain of truth in this statement, then in the homeland of cacti. Mexico, there should be problems with the operation of radars, but they are not.
The reality is that neither a cactus nor any other plant will protect against computer radiation!
A flower near a computer can cheer you up, decorate a strict work atmosphere, a floor, and a positive emotional component in working days. A “emotional placebo” capable of leveling the harmful effects of electromagnetic radiation.
How should the monitor stand correctly so as not to spoil eyesight
So that long-term work at the computer is not a burden, you need to know how the monitor should stand. Correct installation will reduce stress on the eyes and neck muscles. After all, their excessive stress leads to the development of unpleasant diseases associated with sedentary work.
Basic rules for positioning the monitor
A properly organized workplace significantly increases a person’s performance.
Here are some things to keep in mind when setting up a computer monitor on your desk:
- Illumination level. You cannot work at a computer in complete darkness. The light that comes from the monitor is not enough. Ideally, the room should have an overhead light and a small light on the desktop. They don’t necessarily have to be very bright
- A common mistake is to place your monitor too high or too low. Its center should be at eye level. The chairman must be kept straight; if you have to constantly lower or raise it up, Subsequently, this will lead to headaches
- At what distance from the eyes should the monitor stand: the optimal distance is 50-60 cm.If visual acuity does not allow you to clearly see what is happening on the screen, you need to increase the font
- The computer should NOT stand in front of a window, this will create an uncomfortable sensation for the eyes, especially if the brightness of daylight exceeds the brightness of the screen
- If the monitor can be tilted back slightly, this feature is worth using. This will make the image clearer. But if the tilt angle is too large, room lighting can cause glare. Tilting the monitor forward is not recommended, but it can be used if the device is above eye level and cannot be lowered lower
- It is also helpful to adjust the brightness of the monitor. There are special programs that adjust the brightness of the image depending on the brightness of the lighting in the room
Visually impaired people should NOT start working at the computer, not wearing glasses or contact lenses. It is important to keep the monitor clean so that there are no dirty streaks on the screen, wipe it with special wet wipes.
The monitor should be placed correctly, this is a guarantee of good health after hours of sitting at the computer. Its correct position will allow you to avoid overwork, back pain and headaches.
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Minimum and optimal distance to the monitor
The distance from the monitor to the eyes depends primarily on its dimensional characteristics. Today, the most popular are models with diagonals ranging from 14 (laptops) to 27 inches, and the largest equipped with screens with a diagonal of over 30 “. Here are the dimensions in inches depending on the technical capabilities and scope of the monitors.
Most often, there are models with the following characteristics:
- 14-16 “. These are mainstream laptops, the dimensions of which allow them to build in processors for optimal performance. Portable devices with a smaller diagonal have a narrower application.
- 17 “. A laptop with a voluminous body is one of the options for the office. NOT too easy to carry, but saves space in the work area.
- 18.5-20.1 “. Small stationary models, mainly used for working in a text editor.
- 21.5-24 “. monitors with a medium diagonal. a universal option that allows you to comfortably type text, edits, watch movies. To support 3D games, at least 23 ” diagonal is preferred.
- 27 “and higher. They are most often used for watching films, editing photo and audio materials. These monitors are indispensable in studio work, namely, when making sound recordings, shooting films. Screens of 32 inches or more are usually chosen for surveillance purposes. If you plan to use a wall-mounted monitor as a TV, the optimal diagonal is from 31 to 34 “.
So what is the minimum distance to a computer display depending on its size? Based on scientific research, the human eye is able to clearly see an image within a 17 ° radius. From here, the answer is obtained mathematically: the smallest permissible distance between the user’s face and the screen is the length of its diagonal.
Finding out how many centimeters should be between the eyes and the monitor, you need to take into account not only its size, but also design features. Safer Stay Behind TFT LCD Display.
Compared to traditional devices based on a cathode ray tube (CRT), LCD models have the following advantages:
- lack of electromagnetic radiation;
- larger viewable area (on a 15 “LCD monitor it is the same as on a 17″ CRT counterpart)
- lack of image distortion;
- saving table space.
In the presence of a CRT, the computer monitor should be 60-70 cm, and the LCD display, all other things being equal, allows you to reduce the distance to 30-50 cm.To reduce the strain on the eyes, it is important to correctly adjust the image, and first, to test the monitor using a special program (for example, PassMark MonitorTest).
The monitor should preferably be placed in a corner or turned upside down against a wall. If there are several computers in a studio or office, at least 2 meters should be kept between them and do not put their displays next to each other. There are other recommendations for each user:
- During operation, the minimum distance to the monitor screen is about 70 cm. This will help to avoid computer visual syndrome. If you need to look at the display and immediately shift your gaze to the document lying on the table, the sheets are placed closer to the screen so as not to make constant movements of the head or eyes (or even better, purchase a document holder).
- The lighting is arranged so that glare does not fall on the screen. They interfere with the perception of information, make you strain your eyes, change the position of the body. all this requires undue stress and leads to fatigue. If there is a window behind the back of an office worker, it is shaded with curtains or blinds. LB lamps for 300-500 lux are used as artificial lighting.
- Table. Its dimensions ensure comfortable use of the computer. The height is chosen such that the top of the monitor is at eye level; the depth should provide the standard distance from the screen; width depends on the set of peripherals. The more massive the table, the better it dampens vibration.
- Chair. Ideally, a swivel model with adjustable height, armrests, semi-soft seat.
- Keyboard. It, like a mouse, is placed on a table or a special retractable surface approximately at elbow level. In this case, the forearms should be relaxed, hanging freely at the sides. In order not to make sharp tilts of the head forward, the keyboard is installed at an inclination from 0 to 15 °.
How to organize a workspace at the computer
In order to protect the labor of pupils and students, employees, operators, their workplace should be equipped behind the monitor in compliance with sanitary norms and rules. SanPiN 220.127.116.112-96 and SanPiN 18.104.22.1688-02. A competent approach to this issue will help to prevent visual fatigue and other occupational diseases.
The minimum distance from the eyes to the monitor: optimal values to the screen according to SanPiN
To ensure a safe stay in the computer, it is worth finding out what should be the minimum distance from the eyes to the monitor. If the monitor screen is correctly positioned in relation to the user, it will be possible to preserve the quality of vision for a longer time, avoid osteochondrosis and curvature of the spine, and improve the visual perception of information.
According to medical standards, the optimal distance to the computer monitor should be greater than the minimum. that’s one and a half to two diagonal. For the calculation, the following formula is applied: S = L 2.54 1.75, where:
- L is the length of the diagonal in inches;
- 2.54. conversion factor from inches to Centimeters;
- 1.75 is the arithmetic mean between 1.5 and two diagonals.
Let’s calculate according to the formula the optimal distance from an office laptop with a diagonal of 17 “:
S = 17 2.54 1.75 = 75cm.
The calculation results for different computer models are shown in Table 1.
|Display diagonal size, inches||Optimal distance from eyes to screen, cm|
Installation of monitors for the surveillance system
Another important feature is the operation of one screen for several cameras, each of which is located in a certain area and then broadcasts its image (field). It is believed that for effective observation the display should have a maximum of 20-24 fields.
Based on the required number, the diagonal of the device is calculated, and depending on it, the distance from the screen to the guard’s eyes is determined. The correct ratios of all three parameters are given in table 2.
What is the best distance to watch 4K TV
4K is an abbreviation for 4K resolution in digital cinema and computer graphics. To obtain a high-quality image, the optimal aspect ratio of TV, monitor and projector in the 16: 9 aspect ratio.
- Fans of new technologies convince the average consumer that the resolution of the standardized scan in 3840×2160 pixels allows you to watch higher scan (4096×2160), while providing impressive differences in clarity, sharpness, color reproduction and even contrast.
- They also assure that as compensation for expensive cables and ports with increased bandwidth, 4K TV can be watched from almost any distance, and the selection of dimensions here should be done only taking into account the room. In fact, in this case, the calculation of the required size of the diagonal is carried out only taking into account the optimal distance.
- The problem of choosing from what distance it is better to look at the image is precisely the multipixel. For a large screen or monitor, 2.7-3 meters is recommended. But, according to experts, in this case the human eye does not see all the subtleties provided. If the distance from the screen to the viewer is less than the position, 4K will clearly demonstrate the pixels, but will not give the desired picture clarity.
- Therefore, it is believed that the table will help to determine the required distance, which is difficult for an uninitiated person to understand. Meanwhile, most buyers of new models are trying to calculate a safe distance, and at the same time, a high-quality image is not the most important thing for them.
Calculation of the ratio between the screen diagonal and the distance from the intended place of viewing the TV. this is what determines the health of the eyes and the quality of the picture on the screen. If we take into account only the resolution in the TV receiver, And do not care about the health of human eyes, then the novelty and manufacturability of the device will not be appreciated.
CRT, or CRT TVs, are a type of standard device for watching TV programs, in which the required distance practically did not depend on the size of the screen. The required distance to the TV is also calculated from the diagonal size. It is quite simple to determine it by measuring the distance from the TV to the eyes (approximately at the place where the viewer will sit), and then divide by 5.
Naturally, a distance of 2 meters will give a figure of 40 centimeters, and if you divide this figure by 2.54 (the value of an inch in centimeters), you get about 16 inches. If the diagonal is 32 inches, then there should be 4 meters from the TV. The last CRT in THESE large screen TV models was released in 2014. This is due NOT so much to its shortcomings (of which there are few), as to fire hazard and harmful radiation.
Specification Based Recommendations
The calculation of the distance between the TV and the eyes is made correctly taking into account several more parameters: the quality of the matrix, the declared resolution of the TV, contrast and screen formatting.
A common misconception when thinking about how to choose the size of a TV is that the size of the screen diagonal determines good visualization and there is a direct connection between them. However, even on the screens of smartphones and laptops, the image is clearer. You can only achieve the desired viewing angle by fixing a fixed distance to a relatively large screen (43 or 49 inches) or by reducing the distance to TV receivers. But in this case, even with GOOD security, it is important to consider the number of pixels.
The optimal distance that is suitable to comfortably watch Full HD or UHD follows the second principle. Based on the manufacturer’s recommendations, you can calculate the distance as follows: for Full HD, for viewing in complete safety, the display diagonal is multiplied by 1.6, and for UHD. by 0.8.
Distance table depending on the diagonal of the TV receiver.
|Diagonal size in inches||Full HD, up to TV screen, g.||UHD, TV screen, g.|
In this case, the need for a distance of 3 m or more is needed only with a large monitor size. The advantage of new technologies lies in wider possibilities of using the premises, rather than being dependent on distance. Now even a children’s room can become a place for a TV receiver, it all depends on how to choose the right viewing angle, the right gaming gadgets, take into account the distance from the floor to the TV on the wall, if it is placed there.
Determine the diagonal taking into account the size of the room
To correctly determine at what distance to watch TV, you must first of all proceed from what kind of TV is selected. With the existing variety of models, it is difficult for an incompetent person to understand matrices, resolution and other wisdom.
The main thing here is to assimilate one immutable truth. the larger the diagonal I pick up, the further you will have to sit from the screen. And the main thing here is NOT the quality of the image, transmission from the antenna, but the ability of human vision to perceive the image.
If someone tried to enlarge a picture from a mobile phone, a strong increase (zoom in) leads to a disintegration into blurred spots, and no gadgets and cars will save the photo, and mobile tariffs are NOT to blame for this. It all depends on where the screen is. Sometimes the image is blurry up close, but if you look at it from a distance, everything will be clearly visible on it.
Therefore, before giving preference to the Huge screen, you should measure the room where the brand new device will be lovingly installed.
The standard requirements for distance from a 55-inch screen are 4.5 m. If the size of the room allows it to withstand it, everything is fine. If you choose a TV with a 32-inch screen, you will need to watch it from a distance of 2.5 m.Correctly selected technical characteristics will make the image clearer and more beautiful than in a TV receiver with a large screen, but with a worse matrix characteristics.
You can follow the second principle and calculate the diagonal using the proposed formula. measure the distance from the viewing location to the intended location of the purchase. The length will turn out in cm, but it needs to be divided by 5, and then by 2.54 (inch), and you get the optimal size of the diagonal, which can be installed and viewed without prejudice to your own vision.
Plasma LCD and LED TVs
Until recently, they were recommended as the newest and most technologically advanced models in the world of television production. However, if you carefully read the instructions of manufacturers and doctors, then you can calculate the approximate distance here according to the same principle: they both recommend choosing the Required value when buying, multiplying the diagonal by 5. The optimal viewing distance is selected by the formula:
- D is the length of the diagonal;
- L. The required distance to the diagonal of the TV;
- K is a special coefficient, the meaning of which is clear to specialists and has a value from 3 to 6, depending on how the TV diagonal should be located, whether the maximum or minimum allowable range is needed.
According to this formula, the MDD (the minimum length at which the viewer should be to the screen), with D (diagonal parameters) 70-80 inches (and 65 too), should be 5 m. Choose the ratio of the diagonal to the location of the device and furniture, where the viewer will sit, much easier than choosing the diagonal of the TV, and then trying to attach it depending on the number of meters required.
Television does not always broadcast a quality picture. 4K requires an app and additional accessories to get quality content, otherwise the software will correct the imperfections of the map, and if you sit too close, you may see a blurry image. The same rule applies when zooming in for a photo. How many pixels are needed to maintain a normal image?
For everyday use and extended viewing, manufacturers recommend choosing high-definition TVs. It is they, even with a small diagonal, that allow the viewers NOT to depend on the distance. With such accessories, you can afford to sit closer, expand the possible viewing angle and even activate the peripheral vision that is important for a person to the maximum extent.
See below useful information on this topic.
At what distance to watch TV: table of optimal values
The distance to the TV, depending on the diagonal, is by all means the optimal parameter to be taken into account, which must be determined responsibly. Physicians have long been concerned about the problem of the influence of a television screen on vision. Nevertheless, the practice of calculating the distance from TV depending on its diagonal is still NOT widespread.
The vast majority of people, starting from middle age, spend most of their free time watching television and movies. This is understandable, taking today’s realities. there is a TV in every home (despite the claim that computers are replacing it).
Optimal computer position
How can you measure visual comfort by eye? Make sure the computer monitor is about arm’s length from your normal sitting position. The top toolbar of the screen should be approximately level with the eyes. If it is too low, you may be at risk of developing neck pain. If it is too high, it can lead to additional overexertion of the eye muscles.
The monitor should be tilted vertically to avoid unnecessary glare from overhead lighting. Keyboard and Mouse Should be located right in front of you on your desktop. If you place them on an angle, you will be at risk of developing unilateral neck and shoulder pain. The distance from the eyes to the computer monitor also plays an important role.
Discomfort and Side Effects
There is no doubt that staying in front of the screen for a long time will strain the eyes. The monitor is an integral part of the workplace for many people, mainly office workers. If placed in the wrong position, it can force the operator to work in various uncomfortable positions, which can lead not only to the appearance of discomfort, but also potentially dangerous injuries to the musculoskeletal system.
Other side effects of poorly positioned monitor. these are eye irritation, blurred vision, dryness, pain in the eyes and headaches. A common complaint among computer operators is discomfort in the neck and shoulders. The overwhelming number of such complaints indicate that the position of the monitor, including the distance from the monitor screen to the eyes, is an important factor in the organization of the computer workspace.
A frightening trend
The amount of time we spend looking at screens has increased dramatically over the past few years. It’s all to blame for a sedentary lifestyle and lack of necessary physical activity. All this affects mental well-being, anxiety disorders increase. What distance from the eyes to the monitor will help to avoid problems and will NOT negatively affect our vision in the future?
In fact, no one really knows for sure if prolonged use of digital devices causes permanent eye damage. One thing is for sure: an irrationally long time spent at the computer definitely leads to increased eye strain and associated discomfort, which is also called computer vision syndrome.
A person spends about 7-8 hours on a full and healthy sleep. He spends about the same time looking at various monitors: TV, computer, tablet or smartphone. All of these are believed to contribute to increased levels of myopia, or myopia. It is obvious that gradually the growth of this disease is acquiring the level of an epidemic throughout the world.
As comfortable as the eye-to-monitor distance is, if you spend a lot of time in front of the computer, taking regular breaks and visual relaxation exercises is essential. Here are some helpful tips to help you minimize the negative effects of staying in front of your work screen for too long.
- Make sure to wear glasses if you need glasses to look at the screen.
- Blink regularly. During focusing, visual reflexes slow down somewhat, you will involuntarily morgue less as a result. dry, irritated and tired eyes.
- Remember the 20-20-20 rule: every 20 minutes, take a 20 second distraction to look 20 feet (six meters) ahead of the monitor. During this short time, the eye muscles will receive the necessary break for them, which will increase the speed of blinking.
- Try to keep the distance from the eyes to the monitor within the range of 40 to 76 centimeters. Most people believe that the 50 to 65 centimeters border is the most convenient and optimal.
- Make sure the top of the monitor is at or just below your horizontal eye level.
- Tilt the top of the monitor away from you at an angle of 10 to 20 degrees. This will allow you to create an optimal viewing angle.
- Keep your screen free of dust and fingerprints.
- Try to position the monitor so that distracting reflections are NOT reflected on it (for example, from a window).
- Use an adjustable chair that allows you to sit at the right angle for optimal body position and eye-to-computer distance.
- Use the appropriate character size. This important factor largely determines how far from the monitor to the eyes should be.
Distance from eyes to monitor: features, requirements and standards
On average, a modern person spends about 50 hours a week looking at a computer screen. Is it due to the effect of “tired eyes”, headaches, blurred vision and difficulties in focusing and what should be the distance from the eyes to the monitor so that THESE problems can be avoided or at least minimized?
Requirements and norms: what can be done to protect yourself
What factors determine the correct position of a computer monitor? First of all, this is the viewing angle and viewing distance. In this regard, there are certain requirements and recommendations. The vertical field of view should be within a range of approximately 15 to 30 degrees. Some people with visually challenging tasks may limit downward eye movements and use an angle of up to 60 degrees. When using large monitors (17 “, 19” or more), make sure that the top of the screen is not at a higher level than the user’s eyes.
As for the distance of the eyes to the monitor, it is worth referring to the natural physical characteristics of vision. Looking at long distances does NOT cause eye fatigue, as opposed to the muscular effort required to focus on close objects. The shorter the viewing distance, the greater the muscle effort. The norm that provides visual comfort for most computer users is considered to be a viewing range of 40 cm to 70 cm.
What is Monitor Aspect Ratio?
A monitor’s aspect ratio, like any aspect ratio, is a proportional representation expressed as two SEPARATE numbers separated by a colon. In the case of monitors and displays, aspect ratio describes the relationship between width and height. Common monitor aspect ratios include 4: 3, 16: 9, and 21: 9.
Aspect ratio 4: 3
Otherwise known as “full screen,” the four-by-three aspect ratio was once the standard for movies, broadcasts, and computer monitors in the 20th century. With the advent of HD resolution, 4: 3 is no longer as widespread.
Aspect ratio 16: 9
The 16: 9 aspect ratio, also known as “widescreen”, is the international standard for anything high definition. Since its popularity has surpassed 4: 3, 16: 9 can now be found on DVDs, TVs, cinemas and games.
Aspect ratio 21: 9
The aspect ratio is twenty one by nine. is a marketing term used to describe 64:27. As the next step from 16: 9 is logical, the current international standard 21: 9 has NOT fully penetrated the market yet. Until now, its use has been limited to ultra-wide computer monitors and televisions, as well as cinematic widescreen projectors.
What is monitor resolution? Explanation of monitor settings such as resolution and aspect ratio
Monitor resolution? Aspect ratio? What does all this mean !? If you’ve ever bought a computer monitor or TV, you’ve no doubt come across one or both of these terms. Today I will explain in detail what you need to know about monitor resolution and aspect ratios so that you can make the best decision when choosing the right monitor.
What are some common monitor resolutions?
Below are some of the most common monitor resolutions currently on the market, from lowest to highest monitor resolution.
Other names: HD, HD Ready, Standard HD
720p: 720p resolution. this is a monitor resolution of 1280 x 720 pixels. Lowest HD-compatible resolution and is used by all mainstream HDTV broadcasters.
Other names: Full HD, FHD
1080p Resolution: 1080p or 1920 x 1080. This is an interlaced monitor resolution that is marketed as the first resolution to take full advantage of the full range of HD capabilities. 1080p is currently the standard definition for TV, Internet streaming, games, and smartphones.
Other names: 2K, WQHD, QHD
At 1440p resolution: 1440p. it is a progressive resolution containing 2560 x 1440 pixels. Known as Quad HD, 1440p is 4 times higher than the base HD option. 1440p is NOT widespread, but it can be found mainly in computers and smartphones, including from well-known companies such as HTC, Samsung, ViewSonic and Apple.
Other names: UHD, Ultra HD, 4K UHD
In 4K resolution: 4K is so called because of the horizontal pixel count, although for monitors, 4K is the same as 3840 x 2160 pixels. 4K also has 4 times more pixels than 1080p. Although the market share of 4K resolution has increased over the year since 2014, its use has so far been limited to Internet streaming, projection and commercial TVs.
Other names: 8K UHD
At 8K: 8K is measured at 7680 x 4320 pixels and is currently the highest available monitor resolution. The technology is so new that 8K UHD TVs and radio broadcasts are only now becoming available. Currently in the market, 8K is being integrated into TVs, computer monitors and TV cameras.
Monitor Resolution Comparison
720p vs 1080p
In general, 1080p offers twice as much as 720p, so 1080p is sharper and clearer. Aside from the second factors, while both are considered part of the HD standard, 1080p has long been considered the industry standard for monitors. 720p has already peaked in adoption and is declining in popularity.
PPI comparison for 27-inch monitor:
- 27-inch 720p monitor has a pixel density of about 54 ppi
- 27-inch 1080p monitor has a pixel density of about 81 ppi
1080p vs 1440p
With a resolution of just over 3.6 million pixels, 1440p is about 1.77 times smoother than 1080p. However, 1080p is the most popular monitor resolution currently on the market, while 1440p is just starting to take off.
PPI comparison for a 27-inch monitor:
- 27-inch 1080p monitor has a pixel density of about 81 ppi
- 27-inch 1440p monitor has a pixel density of approximately 108 ppi
1440p vs 4K
1440p, or WQHD, has 4 times as many pixels as 720p. In turn, 4K, or Ultra HD, offers 4x more than 1080p. 4K is conquering the market faster than 1440p, and at the same time, 1440p has been in the smartphone industry for over a decade.
PPI comparison for 27-inch monitor:
- 27-inch 1440p monitor has a pixel density of approximately 108 ppi
- 27-inch 4K monitor has a pixel density of about 163 ppi
4K vs 8K
In today’s market, 8K. top of the line. 4x higher than 4K and 16x higher than 1080p. 8K. really cutting edge. However, with the technological advantages of 8K, there is a lack of commercial availability, taking it “new” status. Conversely, 4K is making big strides towards becoming the standard in multiple markets.
PPI comparison for 27-inch monitor:
- 27-inch 4K monitor has a pixel density of about 163 ppi
- 27-inch 8K monitor has a pixel density of about 326 ppi
Monitor aspect ratio comparison
4: 3 vs.16: 9
When viewing content, 4: 3 full screen mode produces a more boxy picture, while 16: 9 widescreen mode produces a horizontally elongated picture. In general, 4: 3 gives the impression of being cropped, while 16: 9 produces black bars at the top and bottom of the screen.
16: 9 vs.21: 9
Considering its current novelty, 21: 9 lacks broad usefulness, and compatible products are limited to topics that are ultra-wide. Compared to 16: 9, 21: 9 advertises no black bars on screen when viewing content.
What is monitor resolution?
In addition to monitor panel type, screen size, refresh rate, and more, monitor resolution is usually one of the first things to consider when purchasing a new monitor. Monitor resolution describes the visual dimensions of any display. Expressed in terms of width and height, monitor resolution is composed of a specific number of pixels.
In the case of a Full HD 1080p monitor, this display has a resolution of 1920 x 1080. This means that the screen will be 1920 pixels wide and the screen height will be 1080 pixels. This results in a total of 2,073,600 pixels on the screen.
The higher the monitor resolution, the more detailed the image can be, since a higher resolution monitor will have more pixels than a lower resolution monitor. This, of course, depends on the resolution of the content you are viewing. In addition, a higher resolution computer screen can fit more visible content than a lower resolution computer screen.
What are pixels?
Pixels or picture elements. these are the smallest physical points on the display as well as the base components. Therefore, pixels are the building blocks of any image you see on your screen. Pixels and resolution are directly related, and the higher the resolution, the greater the number of pixels on the monitor screen.
To make this clear, we can think of pixels as puzzle pieces; each of them makes up a small piece of a larger picture. In addition, the more pixels in the monitor, the more detailed the images can be.
What is DPI / PPI?
DPI (dots per inch) indicates the number of dots found within one inch line of scanning or printing. For monitors and displays, PPI (pixels per inch) is used. While PPI is the correct term when referring to monitors and other displays, both terms are often used interchangeably.
PPI or DPI. it is a description of the pixel density on a monitor screen. Higher pixel density means there will be more pixels for every square inch of your screen.
Pixel density is a significant factor as it determines the quality of your image, and a higher pixel density generally produces a better image. However, the pixel density also depends on the screen size.
PPI and screen size
Imagine you have two monitors side by side, both with Full HD 1080p resolution. That means both are 1920 pixels horizontally and 1080 pixels vertically. Now imagine that one monitor is 32 “and the other is 25”. Now you can see how pixel density comes into play because you will have the same number of pixels across two monitors with different diagonal sizes. Thus, a smaller monitor will have a denser pixel density, resulting in smoother lines and sharper images.
So the higher the pixel density the better, true?
Well, the answer is yes and no. Generally speaking, while a higher pixel density is better, there is a point of diminishing returns. As the pixel density gets higher and higher, the noticeable benefits of the higher pixel density get lower and lower. This will ultimately result in the benefits offered by the higher pixel density rather than being detected by your eye.
In the example above, a 25 “monitor will have a pixel density of about 88 ppi, while a 32” monitor will have a pixel density of about 69 ppi. In this situation, it is safe to say that there will be significant differences in image quality between the two: a 25-inch display provides a better image quality. Going further, smartphones currently have pixel densities ranging from 300 ppi to over 500 ppi.
The problem here is that at some point, the higher PPI becomes NON-detectable, and this is a subject of controversy. Some say the optimal pixel density is somewhere around 400 ppi, while others say the pixel density as determined by the eye is closer to 1000 ppi. Since this is a matter of personal preference, it is always best to test the monitor yourself before deciding which display to choose.
While having a high-resolution monitor is a good start, that doesn’t mean you can start enjoying all your content at that resolution. This is because the resolution of the image you see on the screen also depends on the resolution in which the content was recorded.
So if it was recorded in 1080p and you have a higher resolution 4K monitor, you will watch it in 1080p. Conversely, if you had a 1080p monitor and your content was shot in 4K, you can still watch. but the resolution will be limited to 1080p.
Fortunately, more and more content is being filmed in higher resolution, and services are streaming. such as Netflix offer tons of 4K content to choose from.
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