is lcd screen bad for eyes supplier

47% of U.S. consumers admitted to being unable to last a day without their mobile devices in a 2014 study done by the Bank of America, demonstrating the increasing prevalence of mobile devices. Mobile devices use LCD screens which emit blue light and thus negatively affects not only vision but also overall health. Continual extended screen time mainly can impact your eyes in two major ways.

Digital Eye StrainWhen we look at a screen, our blink rate drops significantly, thus causing digital eye strain. Signs of digital eye strain include slightly blurry vision after using LCD screens for prolonged periods, headaches, dry or tired eyes.

Though digital eye strain is temporary, if left unaddressed, it can turn into a chronic problem.The easiest way to address digital eye strain is to blink more as blinking helps to keep eyes lubricated. Alternatively, try using the “20-20-20 Rule”. Every 20 minutes, stare at something at least 20 feet away for at least 20 seconds. This exercise engages your distance vision and allows the eyes to rest.

Blue Light ExposureBlue light is the highest energy wavelength of visible light. This energy is able to penetrate all the way to the back of the eye, through the eyes’ natural filters. The rapidly increasing amount of blue light exposure that we get each day through digital device use is causing permanent damage to our eyes. The effects of blue light are cumulative and can lead to eye diseases like macular degeneration.

Children are especially at risk due to their developing eyes. Protective pigments which help filter out some of this harmful blue light are not yet present. The risk is worsened further due to their increased exposure to LCD screens.

Studies have also shown that exposure to blue light before bedtime actually suppresses melatonin secretion and delays deep REM sleep significantly. Your health is thus adversely affected. This may lead to reduced cognitive abilities and the development of chronic illnesses in the long run.

Try minimising usage of LCD screens by reading print media or using E Ink displays instead. The InkCase, for example, allows users to read for prolonged periods with minimal power consumption by adding a secondary E Ink screen on the back of your phone.

Continuous usage of LCD screens can impact your eyes in few bad ways, that’s why LCD screens are bad for your eyes. For instance, long hours of usage of these screens can cause digital eye strains or the blink rate of your eyes to drop a little. Your eyes can start feeling tired and some sort of blurry vision.

Although, these problems are temporary often, and only get worse in few cases (who doesn’t care for their eyes while using an LCD screen). If you keep blinking the eyes during LCD screen usage, it’ll surely help in keeping them relaxed.

LCD screens (mostly) contains florescent cathode (cold) backlight display, other screen type LED however uses the emitting diodes that are light and are safer over the eyes. Plus, the cathode rays of LCD can be harder on your eyes. So, it is not that safe for the eyes as the other type is.

Experts say that screens like a computer, phone, tablet screens are not that much harmful over the eyes as we think. They can cause temporary damage like blurred vision (for a short time), tiring eyes, redness, etc. that can be resolved with time. But in only a few cases it gets worse but still can be treated.

Although both screen types have their significant pros and cons. But in the case of the eye’s OLED screen is considered a better option. Because they provide better viewing angles, resolution powers, better contrasts, etc. in comparison to the LCD screens.

Discoveries by scientists suggest that LCD screens leak few chemicals almost in every surrounding (environment). And these particles (chemicals) get toxic with time. Also, the breakdown of these chemicals is not easy and takes time, this increase causes a high mobility rate in the environment.are led screens bad for your eyes

Robert Smith is a technology lover and loves to write about laptops, monitors, printers, tablets, Apple products and anything that"s related to computers and games. He is passionate enough that he maintains this blog regarding tech updates on a daily basis.

As we all know, AMOLED screen is a screen made of self-luminous organic materials. It does not require LCD backlight. When current passes through organic materials, pixels will emit light by themselves. Therefore, compared to LCD screens, AMOLED has more Pure black, higher contrast and other display advantages.

However, being more "ideal" also means paying more. The "eye-damaging" of AMOLED displays stems from external dissatisfaction with the current widespread adoption of PWM low-frequency dimming by AMOLED manufacturers. Here is a brief explanation of the PWM low frequency dimming technology.

All displays have a brightness adjustment function, but due to the differences in materials, the dimming technology is different. The current mainstream brightness adjustment technologies for smart phones are DC dimming and PWM dimming.

LCD screens rely on LED backlight panels to emit light. Therefore, in the field of smart phones, LCD screens mostly use DC dimming. This is a technology that directly adjusts the brightness of the two sides of the light-emitting component to adjust the brightness. The smaller the current, the lower the brightness.

DC dimming is relatively straightforward, but it also has a big disadvantage. Due to the different wavelengths of the three primary colors, DC dimming can cause unavoidable color casts under extremely low brightness conditions, such as early LCD displays with DC dimming , At low brightness, there will be obvious problems of discoloration.

The DC dimming does not seem to be suitable for AMOLED screens. AMOLED screen is a technology that relies on organic materials to emit light. The display quality is greatly related to the material, and the color difference between pixels will be very obvious.

In fact, even though this problem has not been solved very well, maybe it is the case that PWM dimming has become another option and has entered everyone"s sight.

Unlike DC dimming, which directly adjusts the current to control brightness, PWM dimming is more clever. Everyone knows that switching the light source will cause flicker. The faster the switching speed, the faster the flicker. When the frequency of switching the light source exceeds the limit of the human eye, the brightness of all pictures is superimposed in the human eye, so the frequency will affect the brightness of the screen. This technique is called PWM dimming (pulse width modulation).

The introduction of PWM dimming solves the problem of low-brightness color cast in the early days of AMOLED displays, and in fact further improves color stability.

However, with PWM dimming, even if the human eye cannot sense the picture change during the switching process, we will respond to this phenomenon. It is more likely to cause fatigue on the muscles on both sides of the eyes, thereby stimulating the refraction system to accelerate vision Ageing.

At present, Samsung ’s AMOLED screens use 250Hz low-frequency PWM dimming technology. When the screen brightness is lower, the possibility that the human eye can perceive becomes larger, and it is more likely to affect sensitive people.

AMOLED displays that use PWM low-frequency dimming for a long time do seem to affect vision, but do n’t think that LCD can survive. Even with DC dimming, it also has an irreversible effect on vision-cannot be ignored Blu-ray hazard.

Different from the AMOLED self-emission mode, the LCD screen uses a combination of backlight and filter imaging. In mainstream technology, many LCD screens will use blue LED backlight panels, which are covered with red, green and colorless three. This kind of filter forms three primary colors of RGB when blue light passes through these three filters.

Among them, the short-wave blue light emitted by the blue backlight board can cause harm to human eyes. Because short-wave light has a greater capacity density and is more penetrating, it will directly penetrate the lens to the retina, causing atrophy or death of retinal pigment epithelium cells.

From a technical point of view, whether it is an LCD or an AMOLED screen, the impact on vision is universal. As far as smartphones are concerned, it cannot be said that AMOLED screens are more eye-damaging than LCD screens.

Even if the LCD party held high the banner that PWM low-frequency dimming is harmful, it could not fully prove that AMOLED screens have an impact on vision, because everyone"s habits of using mobile phones are different, and the impact on everyone is different. There is no doubt that in the end, it is still the habits that need attention. For example, users should try to avoid watching the phone screen for a long time; reduce the viewing time of LCD and AMOLED low brightness in the dark environment.

Is LCD or AMOLED better for eyes？The full English name of LCD is Liquid Crystal Display, which is a general term. According to its driving method, it can be divided into various specifications. Most monitors and laptops on the market today are thin-film transistors. Because TFT has better color saturation and viewing angles than other technologies, it is also the mainstream specification on the market today. The models on the market are mainly based on TFT, and LCD has now become synonymous with the term TFT display. Next, I will tell you in detail which LCD screen or OLED screen is better for the eyes.

Both OLED and LCD can cause damage to the eyes, because both OLED and LCD emit blue light, which is unavoidable. However, users can turn on the eye protection mode of the mobile phone to reduce the damage of blue light to the eyes. In addition, OLED"s dimming technology and LCD"s blue backlight are also one of the reasons for the "eye-hurt". OLED adopts PWM low-frequency dimming technology, which is a technology that adjusts the brightness through the rapid flickering of the light-emitting unit, so looking at the screen for a long time will cause eye fatigue. The blue backlight of an LCD monitor emits high-energy short-wave blue light.

In terms of manufacturing process, OLED adopts self-luminous technology and has no backlight layer, so this screen can be made very thin. In addition, each light-emitting unit of OLED can emit light independently when it emits light, and has the function of color screen display. LCD is composed of backlight layer, liquid crystal layer, color filter and other components, and the screen is made of inorganic materials, so the service life of this screen is relatively long.

Is LCD or AMOLED better for eyes？The above is the difference between lcd and oled. Users should try to avoid staring at the phone screen for a long time. Reduce LCD and AMOLED viewing time in dark environments. If you have the habit of reading late at night, you also need to turn on a light to neutralize the strobe light. Moisten your eyes with eye drops when your eyes are dry.

With useful technologies like smart phones, tablets, television screens, and computer monitors becoming so integrated in everyday life, it can be hardnotto inadvertently stare at pixels for several hours every day. We all know that keeping our attention buried in blue light can make our eyes tired after a while, but can too much exposure cause significant problems? Keep reading to learn the effects of screen time on our eyes!

The primary culprit of blue light emissions comes from white LED lights — specifically, the LEDs which backlight the screens of our electronic devices. Light emitting diodes are specifically manufactured to put out narrow bands of colored light which mimics white light. Despite us not being able to see it, a lot of blue light tends to leak out of these handy illuminators, which is why they mess with our circadian rhythms.

Dr. Joseph LaPlaca — Founder and CEO of Ares Elite Sports Vision — explains that the eye’s cornea and lens are unable to block or reflect blue light, which may allow blue LED light to damage primary retinal cells in the eye.

“While there’s no strong scientific evidence that blue light from digital devices causes damage to your eyes, there is a growing concern that blue light can have long-term effects on our health,” Dr. LaPlaca said. “Blue light exposure may contribute to the destruction of the cells in the center of the retina and play a role in causing age-related macular degeneration, which can lead to vision loss.”

When you look at a screen, you might imagine your eyes aren’t doing as much work as when you’re doing things in the physical world. In fact, quite the opposite is true!

Digital eye strain is a growing problem and frequent eye complaint. Just like while reading a book, your eyes are constantly darting back and forth while looking at a screen, jumping between lines of text and clinging to colorful, flashy images. This is a recipe for quick ocular exhaustion!

Likewise, people tend to blink less when using computers and other attention-demanding gadgets. This is because blinking and thinking are related: when our minds are intently focused on something, we blink less often because we don’t want to miss anything. Adding to the problem is the constant brightness of screens which naturally demand fewer blinks to look at. These conditions add up to tired eyes, which need a break from concentration every once in a while.

It’s not just computer screens, either. Research has shown thatanyactivity performed up close for long periods of time can increase the likelihood of developing myopia. Hobbies such as reading, writing, knitting, drawing, and painting can increase your chances of nearsightedness, to name a few.

The solution? Spending plenty of time outdoors and away from screens has proven to be an effective countermeasure against myopia, especially with children and young people. So go out and get some sunshine…but don’t look at the sun!

Because almost all of us need to use digital devices for day-to-day tasks, many people look for ways to protect their tired retinas from prolonged exposure. After all, a lot of workers look at screens for a living!

One popular trick is known as the20-20-20 Rule. Simply put, for every20 minutesof screentime, focus on something20 feet awayfor20 seconds. Working in some blinks will also refresh your eyes with a hydrated tear film before returning to the screen! You may also want to consider using blue light blocking glasses, which are specially made to absorb those harmful wavelengths. Other eye-hacks like downloading blue light blocking plugins, using warm screen settings, and angling your device at least 30 degrees from your eyes can help even more.

Artificial eye drops (without phenylephrine—be sure to check) are another effective method used to combat eye strain. Many over-the-counter brands are harmless when used as needed for immediate comfort. However, keep in mind that most artificial tears are held in bottles which release more solution than your eye really needs. Unfortunately, this is a corporate tactic to exhaust your supply faster, forcing you to buy more.

Nanodropper providesintuitive adaptorswhich fit over eye drop bottles to reduce the amount of drops wasted, saving your wallet and optimizing your eye health at the same time. If you experience frequent eye strain from screens, a Nanodropper Adaptor will quickly pay for itself and save you time and money!

I’m here to quell your health concerns: staring at a screen doesn’t damage your eyes. They won’t make you go blind, and your doctor isn’t going to worry about your health if he or she hears that you’re spending a lot of time in front of them. However, you might feel uncomfortable after a long time in front of a backlight, and you might even experience the symptoms of Computer Vision Syndrome, a fancy name for the eye strain and discomfort monitors can cause.

You could try adjusting your entire monitor and desk setup to remedy your pain, or you could use moistening eyedrops. The 20-20-20 rule also exists, which dictates that after 20 minutes of screen staring, you should stare at something 20 feet away for 20 seconds. Take a break. Those blue light-filtering glasses you bought could help, too, but doctors aren’t totally convinced. Science just doesn’t back up these glasses’ claims. That said, you could still wear them and hope for the best. They aren’t going to hurt you.

The average American adult spends 11 hours per day looking at a screen. Since the start of the COVID pandemic, this number has ballooned to 13+ hours. Smart phone use and TV watching certainly contribute to this number, but the top culprit for many is the computer monitor.

Knowing these statistics, brands such as ASUS, BenQ, ViewSonic, and even Dell have begun marketing “Eye Care” monitors. As the name implies, these monitors are designed to minimize the strain of extended hours of monitor viewing.

In this article, we will examine the claims and legitimacy of “eye care” and “eye saving” computer monitor technology. With the help of expert consultants, we will help you determine whether or not an eye-care monitor is worth it.

Many bold claims are made about this life-changing technology. These claims usually begin with a discussion of minimizing eye strain, and end with a discussion of eliminating headaches, eye damage, and restoring healthful sleep.

Because most of us spend hours per day at our computer straining our eyes, the “eye-saving” messages really appeal to us. Almost everyone has experienced dry eyes, strained eyes, blurred vision, or headaches that were caused by excessive screen time. Digital eye strain (“computer vision syndrome”) affects over half of the population.

In truth, most of these “eye-care” and “eyesafe” monitors rely on the two features discussed above — blue light filtering and flicker-free displays. So let’s look into each of these technologies.

First, marketers begin with the statement that blue light is dangerous to our eyes, skin, and sleep patterns. This is factually correct, but somewhat intellectually dishonest.

“It’s true that blue and ultraviolet light are dangerous to eyes, but only at very high intensities.  The amount of blue light produced by a computer monitor or phone screen is so dim that it has no effect on the health of the eyes.  The blue and UV light from the sun is very dangerous and is a documented source of skin cancer, cataracts and retina disease to millions.  This is why doctors recommend sunglasses and sunscreen to people spending significant time outdoors.”– Dr. Norman Shedlo

So, blue light filtering on a computer monitor isn’t a game-changing technology. It may provide some benefit, to be sure. But there isn’t anything particularly advanced or technologically impressive about a monitor that has this feature.

Most new modern monitors allow for the adjustment or filtering of blue light. Windows 10 has a “night light” mode that reduces blue light emission. There are also third-party applications available that allow you to modulate or filter the amount of blue light coming from your monitor display.

To summarize: Exposure to high intensity blue light can be harmful. However, a computer monitor only causes a low exposure. It may be helpful to minimize blue light emission from your computer monitor. But this isn’t a technologically advanced feature that justifies your spending extra money.

If you have ever noticed the flicker of a monitor or other display, you will agree that the flicker can be aggravating and unpleasant to look at. But the important question here is whether or not a “flicker-free” monitor does anything to protect your eyes.

Again, we turn to the experts. Dr. Shedlo tells us that “flicker rates between 70-90 Hz will present a screen that does not appear to ‘flicker’. The flickering itself is not dangerous to your eyes, it’s just annoying. Flicker rates above this are outside the range of human perception and make absolutely no difference. These rates have no effect on eye strain.”

Most of the eye strain that occurs happens because of dry eye and decreased blink. So, while special flicker free monitors and monitor lamps seem fancy and may provide a better user experience, from a medical point of view they do not ‘save the eyes.’– Dr. Yuna Rapoport

We asked our experts a few simple questions: Would you recommend a special eye care monitor for a friend or family member? And would you pay extra for an eye saving monitor?

If we are looking solely at the science and the expert advice, there is insufficient evidence to suggest that eye care monitors actually improve eye health.

As we have previously discussed, blue light has been proven to cause eye damage. So, even though computer monitors don’t release excessive amounts of blue light, it is logical to minimize our blue light exposure.

Even though operating systems (like Windows 10) and third-party applications allow users to reduce blue lighting on their computer monitor, most of us don’t use these features. Therefore, purchasing an “eye care” monitor that automatically includes blue light reduction/filtering may provide some benefit. At worst, this reduction of blue light is neutral, and at best it may benefit our eyes to some degree.

Next, a flicker-free screen may be more comfortable to your eyes. We have established that the flickering of a computer screen isn’t harmful to your eyes. But this flickering can absolutely be irritating to the user. Needless to say, keeping your vision comfortable and aggravation-free during hours of daily screen time is preferrable to an uncomfortable experience.

TÜV Rheinland is a respected testing and certification organization for hazard monitoring of various products. Generally speaking, a product that is certified by this organization can be trusted to minimize the particular hazard or danger that was being evaluated.

So, the fact that a number of computer monitors now have this “eyesafe” certification is undoubtedly a positive thing. However, this certification must be taken with a grain of salt.

The TÜV Rheinland stamp of approval only refers to the display’s ability to block, filter, or otherwise minimize the emission of blue light of a certain wavelength. It does not speak to the efficacy of the monitor, or its ability to actually “save” your eyes or reduce eye strain. Instead, it just shows that the particular monitor “passes the test” in terms of limiting blue light.

The concept behind monitor lamps, monitor light bars, and monitor bias lighting is relatively simple. These products minimize the lighting contrast between your monitor and the surrounding area. A bright display in a dark room causes strain on the eyes, so it is better to have some ambient lighting near your computer.

So, these products probably help minimize eye strain when compared to using no monitor lighting at all. But that doesn’t mean that it makes sense to spend $100+ for a specialty monitor light bar that claims it will save your eyes. Ultimately, these monitor lamps and light bars are simply, as Dr. Shedlo puts it, “smaller lamps placed on the monitor to provide lighting to certain places on the desk. Their function can be substituted for by any suitable desk lamp pointed in the right direction.”

Although we have been critical of “eye saving” monitors, increased screen time is a legitimate concern in our society. Excessive electronics use, combined with a lack of physical activity, contributes to numerous developmental, psychological, and physical harms for users.

A 2020 report (which was sponsored by eyesafe, a developer of displays and filters for Dell, Acer, and Lenovo, we should note…) found that 94% of eye care providers are either “very concerned” or “somewhat concerned” about the impact of screen time on patients’ eyes.

Take breaks periodically. Some experts recommend the 20/20/20 rule, which states that after 20 minutes of screen time, you should look at an object that is 20+ feet away for 20+ seconds. This gives your eyes some time to relax.

Positioning & adjustment of monitor. Be sure to have a properly sized monitor to suit your needs, and have it positioned at a comfortable distance from your seated location. Adjust the display’s “contrast, colour balance, and even the overall text size so it is comfortable to read over extended periods,” says O’Flynn.

Eye Care monitors are quickly gaining market share due to their ability to reduce blue light and flicker rate. Because most of us spend hours per day staring at screens, “eye saving” technology sounds like it would be worth every penny.

However, much of this “eye saving” technology is actually just marketing hype. As Dr. Shedlo puts it, these computer companies use language that is “scientific and technical [to give] the impression of legitimate benefits based on scientific data.” But “the claims about the relationship of new monitors to eye health have no basis in reality.”

Some of the new “eye-care” and “eyesaver” monitors are legitimate, high-quality monitors that are worthy of your consideration. But don’t spend a lot of extra money on these products in the hopes of minimizing your eye strain or “saving” your eyes.

We still don’t have a “fix” for the eye strain caused by digital screens. But you can minimize the harms by taking periodic breaks, wearing correct prescription lenses, and adjusting the display brightness and ambient lighting to comfortable levels.

Are computers bad for your eyes?  And if so, what can be done about it?  These are questions that thousands of Australians ask every week.  The past ten years has seen enormous changes in the use of computer screens.

Once a desktop screen used only at work, the computer screen has been promoted to a mobile device that is with us 24/7.  The latest generation of teens and young adults stare at their smart phones, iPads and games consoles all day.  Coupled with this increased exposure is the increased intensity of light emitted from these screens. Is this harming our eyes?

This is one of those questions that anyone buying a new TV asks but most people are unaware that it’s a misleading question.  Technology manufacturers like to draw an artificial distinction between their LED and LCD monitors.  This cons us into believing that the LCD has been superseded by the LED, when in actual fact all that’s changed is the way the LCD monitor is backlit.

LCD (liquid crystal display) technology – to the uninitiated – involves sandwiching a liquid layer between two layers of glass and backlighting it. Older technologies backlit the screen using fluorescent light – called CCFL (or cold cathode fluorescent light). This produced light across all parts of the spectrum, with the peak in the green light part of the spectrum (see image, left).

More modern computers still use LCD screens but the backlighting used is more often LED (light emitting diode) technology. This has many advantages over the older fluorescent light technology.  It provides a thinner, lighter and more energy efficient display – generating less heat and consuming less power. However, the LED light spectrum is very different to the older fluorescent technology and emits a lot more light from the blue-violet end of the spectrum (see image, right).

UV light is invisible, but its very short wavelengths allow it to penetrate the delicate superficial tissues of our eyes and skin and cause oxidative damage. This is what leads to skin cancers as well as contributing to many eyes diseases particularly of the cornea and lens – i.e. cataract, pinguecula and pterygium.

Blue-violet light is visible light, but is on the part of the spectrum right next to ultra-violet. Blue-violet light has been shown to be toxic to the delicate structures of our eyes. It can penetrate deeper into the eye – as far as the retina – and it is emerging in clinical data that is has a negative effect on the health of our eyes, particularly for age-related macular degeneration.  The mechanism by which blue-violet light damages the retina is still being studied but it is thought to disrupt cellular metabolism at the back of the eye.  Blue blockers are glasses which filter out blue-violet light. The filter can be worn with or without a glasses prescription.

Not all blue light is bad!  At the greener end of the spectrum is blue-turquoise light.  Unlike blue-violet light this kind of blue light is beneficial to us.  This is the light that helps regulate our bio-rhythms, telling our bodies when to wake up in the morning and slow down before sleep. Blue light suppresses melatonin production in our bodies, so it is not healthy to be exposed to artificial blue light late at night as it prevents us our natural winding down mechanism from kicking in. This is a good reason why digital screen use should be avoided in the hours preceding sleep, regardless of whether blue-blockers are worn.

The negative effects of blue light on the eye are especially true for children. We previously wrote about kids’ eyes and computers here. (Link to clock-lock-block article).  The image below shows the relative intensity of light at various wavelengths for a typical L ED screen. It doesn’t matter what the device, if it’s modern, it’s typically emitting most light at the blue end of the spectrum.  This is bad news for our kids, who often spend hours per day on digital devices such as tablets and smartphones.

Take home message?  Exposure to blue-violet light should be limited as much as possible. Companies like BenQ now make all their screens with blue light filtering technology.  Children’s use of digital screens should be limited, to protect their particularly delicate eyes.  For the rest of us, blue blockers can provide protection from harmful blue-violet light but to get a good night’s sleep you should also limit screen exposure before bedtime.  And yes, that means TV too!

see the light flickering at a very high frequency, thestroboscopicdoes exist. If thestroboscopicfrequency is very low, it can be easily observed by human eyes.

“I’ve changed to a high-end smartphone with an OLED screen, but my eyes feel uncomfortable.” More and more netizens have this problem. Do OLED screens really hurt our eyes? Recently, a reporter investigated this phenomenon.

“I would never have thought that my eyes were becoming uncomfortable after using a new mobile phone for a few days.” Recently, a netizen reported this issue.

She went to see a doctor and was diagnosed with floaters. The doctor advised her to use her mobile phone less. It is strange that her symptoms were relieved after she changed back to her old mobile phone.

According to the reporter’s investigation, quite a few users have such questions. There are nearly 400,000 related links in Google search for “Eyes hurt by OLED screens“. Many related posts have resonated with netizens because they also had this symptom.

In the past two years, OLED screen smartphones have become the mainstream, and major smartphone manufacturers in the market are applying OLED screens in their flagship models one after another.

The problem is, do OLED screens really hurt our eyes? The reason why you feel uncomfortable when using mobile phones with OLED screens is that they flicker.

LCD screen usually uses LCD backlight to realize screen luminescence, the flickering frequency of which can reach several kilohertz (Hz) that flickering will basically not occur. The pixels for OLED screens are self-luminous, the low power of which has limited its flickering frequency. At present, the flickering frequency of the PWM dimming of OLED screens on many mobile phones is about 215Hz-250Hz.

IEEE (Institute of Electrical and Electronics Engineers) once reported that the range of flickering frequency with low health risks is above 1250Hz. “Flickering may lead to migraine and other diseases.”

In the eyes of communication industry professionals, this value is not high. But even the medical circle has not given a clear answer to this question, which is a great controversy in the industry.

Jie Chuanhong is the director of the ophthalmology department of the Eye Hospital of China Academy of Chinese Medical Sciences. He said in an interview that whether you watch the mobile phone screen, computer screen, or iPad screen for a long time, it is easy to cause visual fatigue, which should not be directly related to the screen.

“There is no direct relationship between OLED screen and eye harm.” Communication industry professionals also said that human eyes are almost imperceptible to the flickering of OLED screens. “Visual fatigue may be caused by staring at the screen for too long.”

Some experts claim that both LCD and OLED screens can harm human eyes because they will emit blue light harmful to the eyes, which is inevitable. However, OLED has a way to avoid this problem, enabling the eye-protection mode (similar to PWM dimming) and changing the color tone of the screen to yellowish.

Many netizens also suggested that when using smartphones with OLED screens, we should increase the brightness as much as possible because the lower the brightness, the more harmful it will be to our eyes. When the brightness of the screen is reduced, the screen of the smartphone will further reduce the flickering frequency.

Some ophthalmologists suggest that “human eyes have different perceptions of OLED flickering, and some people are more sensitive. Sensitive users had better use smartphones with LCD screens.” There has not been a unified medical statement about this conclusion.

Some netizens even made a comparison experiment: you can obviously feel that the screen of P30 Pro is not as good as that of Mate20 Pro. This is easy to understand. Different mobile phones may use different screens, and manufacturers such as Samsung, LG, and BOE have different technologies and product quality.

Some experimental results have shown that screen size is not the main factor influencing visual fatigue but the material and physical properties of different electronic screens.

Even for the same mobile phone, whether the screen is good or not depends on “luck”. Because different brands of OLED screens may be used in the same mobile phone model, in many cases, the mobile phone manufacturer will not specify this, nor does it list the screen provider in detail in the user manual.

For example, Mate20 pro screen suppliers include BOE and LG, and some of their products have experienced “green screen” events after being released on the market. According to media reports, all the mobile phones with green screen problems are those with LG screens. That is to say, the screens in the same mobile phone model may be different for the same price. Whether the mobile phone is good or not depends on luck.

This is almost a common problem in the industry. Initially, both the iPhone XS and XS MAX were equipped with Samsung’s OLED screens. But then Apple listed LG as its second iPhone XS screen supplier. In other words, LG screens may be used in the subsequent batches of iPhone XS and XS MAX. Whether consumers buy LG screens or Samsung screens depends on luck.

The color of OELD screens is more vivid, fuller, and realistic. High-end smartphones have been equipped with OLED screens, which have become the mainstream; LCD screens have been used for low-end smartphones, which are no longer the preferred choice.

Why did this happen? “Terminal products such as the ones with fingerprints under the screen and ultra-thin products can only be realized by using OLED screens.” It has become a common recognition in the industry.

Now there is good news BOE suddenly announced that it has successfully developed fingerprint technology under LCD screen, which will be mass-produced by the end of this year.

It is unrealistic for the mobile phone industry to return to LCD screens from OLED screens, and even some people think it means the degeneration of technology. From the perspective of eye health alone, LCD screens will also emit blue light harmful to human eyes. If we really want to protect our eyes, we must reduce the time consumed by smartphones.

Computer users complain of blurred vision, tired eyes, dry eyes and headaches on a daily basis. Many blame their computers for needing eyeglasses, while others claim that staring at a screen has caused their myopia (nearsightedness) to worsen. High tech employees worry about computer monitor radiation. What they all share is their concern about permanent, irreversible damage to their eyes.

The good news is that extensive research into eye health in Israel and North America has conclusively and repeatedly proven that digital screens do not cause eye damage. Nor has it been proven that intense computer activity can lead to or affect myopia, as in the case of high tech workers. That said, everyone agrees that computer use may cause temporary eye problems, most of which can easily be solved or prevented by simple changes in work habits.

As a general rule, if eye strain symptoms appear following a short period of computer use, this means that there is a specific eye health issue that should be addressed. However, developing tired eyes after eight hours of non-stop intense visual activity is totally normal. After all, wouldn’t you expect your legs to tire after running a marathon?" - Doctor Andrew Fink MD.

This article was written by Doctor Andrew Fink MD, Eye Surgeon, Fellow of the Royal College of Ophthalmologists. We are very grateful for his contribution.

Eye strain occurs when your eyes get tired from intense use over a prolonged period of time, or when the muscles in your eyes fatigue. This means that eye strain can be caused by any number of events or situations, such as reading sheet music in a small font, composing in the dark or even driving a car for extended periods, to name a few.

There is no scientific evidence proving that eye strain causes permanent damage. Eye strain is generally associated with symptoms such as blurred vision, tiredness, soreness, itching of the eyes or headaches.

But these are just symptoms of eye discomfort, in the same way that muscles are often sore after exercising at the gym, which is an uncomfortable – yet harmless – side effect. By introducing good habits into your daily routine eye-strain should be prevented, or at least counteracted.

The size of the pupil changes according to the brightness of what the eye is looking at. So if the ambient lighting is continuously changing, the pupil will work more intensely leading to the muscles feeling tired.

The size of the pupil changes according to the brightness of what the eye is looking at. So if the ambient lighting is continuously changing, the pupil will work more intensely leading to the muscles feeling tired.

Wearing eyeglasses with an incorrect prescription will cause the eyes to tire more quickly when intensively staring at a screen for extended periods of time.

Our eyes are designed to look down slightly when reading or doing close-up work. Looking straight ahead at a focal point, or worse upwards or sideways, will cause additional strain on the eye muscles.

Lastly, the blue light factor has been extremely controversial among scientists. Although it can be found in almost everything from sunlight to fluorescent and LED lighting, it is actually considered as having both positive and negative effects on the eyes. Light is made up of electronic particles, and blue light has a very short wavelength thereby producing more energy.

Blue light can be more difficult to focus and may contribute to discomfort over longer viewing periods. Laboratory studies have also proven that there is a link between retinal problems and high exposure to blue light. However, computers produce far less blue light than natural sunlight, and the threshold past which exposure becomes “high” has not yet been determined.

On the other hand, blue light has also been proven to boost alertness and cognitive function, and help release happy endorphins. For those worried by the effect of blue light, there is no shortage of blue light filters for computer screens or blue light-blocking computer glasses.

Let’s start by having a closer look at the technical characteristics of the two main screens on the market: E-Ink (Electrophoretic Ink) and LCD (Liquid Crystal Display). E-Ink is an electronic paper display technology integrated into e-book reading devices such as Kindle. LCD screens are found in iPads, tablets, smartphones, televisions and computers.

Basically, E-Ink screens offer a reading experience similar to that of reading a paper book, whereas LCD screens offer a digital experience. Based on these preliminary findings, it would make perfect sense to believe that E-Ink screens are better for the eyes. Surprisingly, however, Dr. Fink and the American Optometric Association state that “the nature of the screen (LCD vs. E-Ink) is largely irrelevant”. So, why aren’t E-Ink screens considered as being naturally better for the eyes?

One recurring argument is that E-Ink screens are preferable because backlit screens damage the eyes. As it turns out, this isn’t true. According to the American Optometric Association, “backlit screens do not make any difference as our eyes naturally adjust to the amount of light we are exposed to”.

Furthermore, since LCD screens are backlit they offer built-in options to manually adjust screen brightness. Most LCD screens do this automatically by calculating the ratio of external vs screen lighting.

Another argument comes from Carl Taussig, director of Hewlett-Packard‘s Information Surfaces Lab. According to him, “the new LCDs don’t affect your eyes, today’s screens update every eight milliseconds, whereas the human eye is moving at a speed between 10 and 30 milliseconds.”

To improve the reading experience, Apple has introduced the Night Shift and True Tone features. Night Shift is designed to automatically adjust the display color balance in order to reduce brightness. True Tone automatically changes the white point and color balance of the display based on real-time measurements of the ambient light falling on the screen. The idea is to make the display behave more like paper reflecting ambient light and taking on its color.

The adaptive design of LCD screens means that your eyes won’t have to adjust when you look up from the screen, as the screen brightness will have automatically adapted to the ambient lighting, thereby significantly improving eye comfort.

Screen reflection is also commonly mentioned as being a cause of eye strain. Technically speaking, the presence of glare and reflections on the screen can make viewing difficult due to different degrees of brightness scattered over the screen, which cause constant adjustments in pupil size. That being said, those adjustments are a natural reaction for the eyes and are neither damaging nor completely solvable.

In addition, LCD manufacturers are investing large amount of money on anti-glare and anti-reflective technology. And Apple are ahead of the game. According to them, the iPad Pro has the lowest screen reflectivity compared to that of any other tablet on the market.

Screen resolution and display settings are extremely important when reading from a digital screen. High resolution generally means a better, sharper viewing experience, with less strain placed on the eyes. Reading, annotating and editing sheet music on a device with a high-resolution LCD screen provides a fuller experience, allowing users to zoom-in and comfortably see every little detail, without pixelation.

For example, Apple’s second generation 12.9-inch iPad Pro has one of the largest screen resolutions available on the market, at 2732 x 2048 pixels (264 DPI). E-ink screens, in comparison, are usually limited to a resolution of 1600 x 1200 pixels (150 DPI).

Dr. Travis Meredith, chair of the ophthalmology department at the University of North Carolina, sums it up in his own words: “sitting close to a television, or computer screen, isn’t bad for our eyes. It’s the environmental context that matters”.

“I read my digital scores from my iPad seven hours a day and have never felt any eye discomfort. On the contrary, I appreciate the flexibility of its brightness settings or the possibility to zoom-in. I simply couldn’t go back to using paper scores." David Lefèvre, Concertmaster, Newzik ambassador

The recommended distance is whatever is comfortable, but for reading it’s usually considered to be about 13 inches for both A4- or A3-sized screens. It’s important to make sure that note and font size are not too small.

Taking into account all of the above, we can conclude that eye strain is not caused by digital devices, but rather by a combination of uneducated practices and bad habits.

We simply need to give ourselves time to adopt these new habits and begin re-educating ourselves to better cope with intense eye use. If we are diligent in integrating this new approach, we will be able to ride the wave of technological advancements while protecting our eyesight.

Chances are, you use computers in the workplace, and while they’re helpful in a multitude of ways, they can cause eye strain. That eye strain can lead to blurry vision and even headaches and neck pain.

According to recent studies, as many as 90% of people who spend extended time in front of digital screens experience some sort of eye strain or related eye issues. While giving up computers all together may not be an option, you can take steps to keep your eyes safe while on the job and at home. Our experts at McDonald Eye Care Associates discuss practical tips to protect your eyes from eye strain.

Scheduling a comprehensive eye exam is one of the key steps in preventing eye strain related to computer screens. Our team at McDonald Eye Associates offers comprehensive eye exams to detect any visual issues and can explain how to keep your eyes safe from eye strain while at work.

People have a habit of sitting close to their computer screen, but sitting too close to your screen contributes to eye strain. Adjusting your screen position is a simple and easy step you can take to protect your eyes. You should sit at least 20-30 inches away from your screen and position the top of your screen at eye level. This not only reduces the chances of eye strain; it prevents neck strain.

When it comes to screen time in the workplace, lighting is everything. Offices that have too much natural or artificial light increase glare on your screen, which spells trouble for your eyes. Try tackling the glare in your office to ease the strain on your eyes.

Depending on your office setup, you may need to partially close blinds or draw shades halfway closed. You may also need to turn off any harsh lights or position your screen to prevent direct sunlight from causing glare.

Anti-glare screen filters are a simple way to cut down on the amount of light that reflects off of your computer screen while you work. The result is a more pleasant viewing experience that won’t result in eye fatigue and strain.

Anti-glare glasses have a coating that reduces glare and reflections to protect your eyes. This is an excellent option if you use laptops, cell phones, and other devices along with standard desktop computers.

Rest breaks for your eyes are something your grandparents didn’t have to plan into their day. But today we spend more and more time at our computer screens and need to consider giving our eyes a rest throughout the day. It’s best to give your eyes a short break after every two hours of continuous screen time. This could mean taking a five-minute walk to the watercooler during your workday.

Electronic manufacturers are pushing the boundaries with vivid screens that display colors and images that appear vibrant and bright. While this may look stunning, your eyes weren’t meant to look at bright, vivid screens for hours at a time. Going into your computer’s settings and turning down the brightness and backlight can go a long way in preventing eye strain.

If you use a traditional desktop, consider upgrading your monitor. LCD monitors are more gentle on your eyes than older technologies. A high-resolution LCD monitor is able to display crisp, sharp images without problems with flicker, so your eyes are in less jeopardy when working at the computer.

Did you know that when you stare at a screen for long periods of time it causes you to blink less often? When you blink less, your eyes can become dry and irritated, increasing the risk of eye problems. When at the computer, make it a point to blink normally and fully. If you find that your eyes feel dry, use artificial years to keep them moist.

At McDonald Eye Care Associates, we are a full-service eye care practice. For more information or to schedule a routine exam, call our Lakeville, Minnesota, office.

You may have seen news stories about possible vision damage from the blue light emitted by computers, smartphones, tablets, televisions, and other electronic devices. Too much screen time is a common pitfall in this digital age, and it can cause eyestrain in some people. But the chances of permanent vision damage are low.

About 80% of American adults say they use digital devices for more than two hours per day, and nearly 67% use two or more devices at the same time. This level of exposure to digital technology for work, school, entertainment, and everyday activities has created a set of symptoms known as digital eyestrain (DES). Nearly 60%of Americans experience some symptoms of DES.

This has led to health concerns about the potential for blue light to harm eye tissue. Because blue light has a short wavelength, it produces a high amount of energy. Dozens of studies have investigated whether exposure to blue light over time could cause serious, long-term eye damage.

Early laboratory research using animal models suggested that excessive blue light exposure could damage some sensitive cells in the retina, the layer of nerve cells behind the eyeball. It can lead to eyestrain and focusing problems, but no research has conclusively shown that blue light causes long-term harm, eye disease, or retina damage.

Despite this lack of proof, many news sources, health- and vision-related websites, and health organizations suggest a causal link between blue light exposure and retina damage. This has led to an interest in “blue blockers,” which are special eyeglass lenses that filter out blue light in the same way UV lenses block ultraviolet light.

Manufacturers of these lenses often make bold claims about using blue blockers to prevent retina damage, sometimes quoting studies that examined the effect of blue light on cellular eye tissue. However, a National Institutes of Health analysis of blue blockers research found no solid evidence that these lenses improve vision or preserve retina health.

Still, too much time with digital devices can cause problems. Digital eyestrain often leads to dry eyes and puts an extra burden on the muscles that help the eye focus. Also, the eyes do not blink as frequently when looking at digital devices, which causes faster disruption and evaporation of the film of tears that protects the surface of the eye. That can cause minor eye irritations such as burning and stinging.

Take frequent breaks while using digital devices. Use the 20/20/20 rule: For every 20 minutes of usage, look away for 20 seconds and focus on something 20 feet away.

After working on a computer or browsing on your phone for too long, do your eyes become tired, dry, or strained? Then you’ve experienced what so many others have: eye strain. The past year has pushed many people to work or take classes from home, which leads to increased hours of screen time. Learning how to protect your eyes from computer screens can prevent you from feeling the discomfort of digital eye strain.

Eye strain is a condition that is commonly associated with driving long distances or staring at computer screens and other digital devices. It usually occurs when your eyes get tired from intense use, and it will usually subside on its own. For the most part, a digital eye strain is more annoying than painful. However, in some cases, eye strain can be a sign of an underlying eye condition that may require treatment.

In the digital age, technology has helped us accomplish more. But after hours of looking at screens, your eyes may become watery, dry, sore, or itchy. That’s because the light, specifically blue light, emitted off your computer or phone’s screen can put a strain on your eyes. Some long-term studies have shown that it can damage your retinal cells, which may lead to age-related macular degeneration. Until more research is conducted, most experts don’t believe that screens cause permanent damage to your vision. Digital eye strain headaches are a common symptom of eye strains from excessive screen time.

Do you feel some discomfort in your eyes after a long day of looking at your digital devices? If so, then you’re probably looking for a way to reduce digital eye strain symptoms. Here are some tips on how to protect eyes from computer and phone screens.

One of the most practical ways to protect eyes from computer screens is the 20/20/20 rule. It works like this, for every 20 minutes you spend staring at a screen, you must look at something at least 20 feet away for 20 seconds straight. This provides your eyes with a much-needed break. Feel free to adjust the amount of time you look away from a screen—the longer, the better.

Whether you are working from home or at the office, make sure your environment is appropriately lit. Less light in your room is actually better for your eyes. To ensure your work environment isn’t too bright, close curtains and use lower voltage bulbs.

A regular eye exam can help you get ahead of any eye conditions or problems from which you may suffer. It can also be a great opportunity to see if there aretreatmentsout there for your specific eye issues. Talk with an expert today about your eye health.

When possible, using an anti-glare matte screen can help reduce the effect glare can have on your eyes. Glare from your computer or phone’s screen stops your eyes from making adjustments that they need for you to focus. If you wear glasses, make sure your lenses have an anti-reflective coating.

The typical screens you deal with today offer refresh rates of 75Hz or more. The higher the better. Furthermore, screens with higher resolutions appear more lifelike. When you can’t see the pixels, your eyes don’t work as hard to make sense of the images in front of you.

One of the best ways to treat your eye strain problem is with artificial tears. As an effective way of keeping your eyes lubricated, artificial tears can be bought over the counter. Some artificial tears come with preservatives and some without, so you may need to try a few before finding the one best for you.

If you are suffering eye strain and are not finding relief from the above solutions, it may be time to see your eye doctor. As mentioned before, a regular eye exam can help you get ahead of any underlying conditions that are affecting your eyes. It can also be an opportunity for you to ask how to protect your eyes from computer screens. In the case that you do have an underlying eye condition, and want to see if you are a candidate for LASIK you shouldschedule a free consultation. You can trust that our doctors will help find the best solution for your eyes.

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Statista’s statistic shows the total number of mobile phone users worldwide from 2015 to 2020. In 2019 the number of mobile phone users is forecast to reach 4.68 billion.

In recent years OLED technology has emerged as the leading smartphone display technology, and the world"s most popular phone vendors are all shipping AMOLED smart phones.

The AMOLED displays are thought to cause ‘eyes hurt’ because of low-frequency dimming by AMOLED manufacturers. so here comes the question, which one is more harmful to eyes? OLED or LED?

Blue light is high energy visible light, widely acknowledged to bear harmful effects like discomfort to the eye and damage to the retina, as well as serve as a contributing factor to diseases such as cancer, diabetes, heart disease, obesity and insomnia. Children seem to have delicate retinas that are highly susceptible to the dangers of blue light.

Intertek, an independent quality assurance specialist firm in the UK also concluded that OLED lights emit merely 10% of the blue light emitted by LED lights with the same luminance and color temperature.

Flicker is a visible change in brightness between cycles displayed on video displays. It applies especially to the refresh interval on Cathode ray tube (CRT) televisions and computer monitors, as well as Plasma based computer screens and televisions.

The switching light source causes flickering. The faster the switching speed, the faster the screen flicker. Most mobile phones adopt DC dimming and PWM dimming. DC dimming is a technology that adjusts the brightness by directly controlling the currents on both sides of the light-emitting device. The smaller the current, The lower the brightness.

IEEE PAR1789 recommends practices for modulating current in High Brightness LEDs for mitigating health risks to viewers. LCD screens mostly use DC dimming. DC dimming itself is a very straightforward method. But it has obvious drawbacks. As the wavelengths of the three primary colors are different, DC dimming can cause inevitable color casts at the extremely low brightness.

AMOLED displays use low-frequency PWM dimming technology. The lower the screen brightness, the lower the strobe rate, and the greater the possibility of human eyes being able to perceive, making it easier for sensitive people.

PWM dimming is a technique that adjusts the brightness by fast flickering, even if the human eyes cannot perceive the screen changes in the switching process, our brain responds to this phenomenon. Frequent flickering cause fatigue, which stimulates the refraction system to work together to accelerate the aging of vision.

Why DC dimming is not adopted by AMOLED displays? AMOLED displays are self-illuminating technologies that rely on organic materials. The display quality of the AMOLED display is directly related to the quality of the screen materials . The color difference between pixels will be clearly demonstrated. Under DC dimming, early models such as the Galaxy S, S2, and Note suffered from uneven white color and serious color casts. What’s sadder, this problem has not been solved well even so far. However, the PWM dimming reference solves the problem of the early low-brightness color cast in the AMOLED display, and in fact further improves the color stability.

5. People with very high flicker sensitivity may need to switch to LCD displays, which have relatively slow response times that will dampen any flicker. The LCDs should have full 24-bit color without Frame Rate Control (FRC) found in 18-bit (or less) displays.

With the mobile phone, there is the so-called 20/20/20 rule. Basically it means that every twenty minutes you need to look at something at least twenty feet away for at least twenty seconds.

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Most people know the sun can hurt our eyes but are less clear on whether to worry about other bright lights, like computer screens. In short, these screens are far less damaging than the sun.

This is because screens aren’t as bright as the sun, and newer screens don’t generally produce UV rays, the most damaging kind of light the sun produces. Instead, the most important light to consider that screens produce is short wavelength, high-energy blue light.

In the short term, blue light is mostly associated with potentially causing eye strain. Per the American Optometric Association, this usually isn’t serious and can mostly be solved by habitually looking away from your screen on occasion and practicing some basic techniques to reduce the strain.

In the long term, some studies have suggested the blue light from screens can damage retinal cells, leading to problems like age-related macular degeneration. The extent of this issue is not fully understood, but it is notably