is lcd display good for eyes quotation

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.

“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.

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.

Reading on a small screen can strain eye muscles, causing blurry vision and headaches. A rule to remember: every 20 minutes, look up at something about 20 feet away, for about 20 seconds.

Blink! While staring at a screen we blink half as often as is the norm, which is typically about 15 times a minute. That causes your eyes to become dry and irritated.

Adjust your display settings. Glaucoma patients can experience a decline in contrast sensitivity. Black text on a white background is best, though other dark on light combinations can work. Adjust text sizes on your computer screen and smartphone. For example, on an iPhone, open the Settings menu, choose General, then Accessibility, then Large Text. If you don’t know how to adjust the view on your device, check the manufacturer’s website.

Numerous helpful magnification apps are available. One called SuperVision Magnifier provides extra light by using the phone’s camera and also has an image stabilization feature so that the enlarged type or images, such as from a menu or magazine, don’t seem to move around.

If your older desktop monitor is causing eye strain, replace it with a flat-panel LCD screen that is easier on the eyes. Select a screen with the highest resolution possible.

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.

Protecting eyes from computer screens and smartphones is more important than ever, but effectively tackling the problem is more about prevention than treatment.

Simple preventative measures help protect eyes from computer screens and smartphones, and we’re going to take a look at a few of those measures in this article.

There is no evidence that strain makes your eyesight worse in the long run, but it does cause extreme discomfort and makes getting through a work day difficult.

How exactly does the screen affect your eyes? There are several signs to look out for, they can vary slightly depending on whether you use a computer or a smartphone. Let’s take a look at some of those complaints, and discuss how you can avoid them. The American Optometric Association recognizes the most common symptoms of eye strain are:Headaches

When looking at a high resolution screen, we subconsciously blink less, other pain responses can also decrease causing the body to not signal that something is wrong. This is particularly common with computer use and is called “computer vision syndrome”. Over long periods of time, this can be harmful to your overal eye health. When working on a computer all day, these symptoms can arise after using a screen for prolonged periods of time.

Your eyes aren’t designed to stare all day at something directly in front of you. With the 20/20/20 rule, you give your eyes a much-needed break during long work days.

If you look at the screen for 20 minutes, you must look at something at least 20 feet away from you for 20 seconds. The longer you look away from your screen, though, the better!

It may sound counterintuitive, but less light in your room is actually better for your eyes when you’re working on a computer. Offices shouldn’t be too bright, so when possible, close your curtains and reduce your use of fluorescent lighting.

Use an anti-glare matte screen where possible (rather than glass-covered LCDs). If you’re a glasses wearer, make sure your lenses have an anti-reflective coating.

Most people don’t have to use CRT screens any more. Those are the old computer screens with low refresh rates that created a noticeable flicker that made your eyes feel uncomfortable.

Today, screens typically 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.

Blue light has a short wave-length and is known for causing damage to the eye. Reduce blue light by using specialist glasses or reduce the color temperature of your screen. It’s ideal for long-term use.

Just like computers, mobile phone screens can present an opportunity for eye strain. The fact we use our phones in place of pen and paper for virtually everything we do, means it’s something we should talk about. How do phones affect your eyes?

However, we often use our phones differently from our computers. With computer usage, we may spend several hours looking at the screen. We use smartphones for shorter periods of time throughout the day, but can total hours of usage by the end of the day.

Although this is less stressful for the eyes, if you’re straining when you look at your cellphone screen, it can mean you are placing stress on your eyes resulting in mobile phone eye strain. This can negatively affect your eye health over the long term.

It’s easy to forget that your screen can be customized, because it looks fine straight out of the box! Everyone’s eyes are different, however, and all smartphones allow you to change contrast, brightness, and text settings.

Modern Android and Apple smartphones offer night mode features that make it easy to automatically reduce strain on your eyes at night.Turn the feature on, and your phone will automatically adjust screen settings depending on the time of day.

This might sound silly, but it’s easy to forget to blink when we’re using smartphones and tablets. Subconsciously, we become so focused on the content that we simply stare at the device.

Smartphone screens are glossy, but matte screen protectors give you that old-screen LCD finish. They protect your screen and they reduce glare from ambient lights or sunshine. They’re inexpensive, too!

For all types of eyestrain, be it caused by computers or mobile devices, artificial tears can be an effective tool in keeping the eyes comfortably lubricated. There are many types of lubricating eye drops on the market — both with and without preservatives — that can be purchased over the counter. You may need to try several before you find the one you like best.

Adjusting the brightness on your phone is important, your phone may even do it automatically. The ambient light sensor on your device will allow the light to shift depending on how much light is already available. As mentioned earlier, the night mode feature reduces the impact blue light has on your eyes.

Still, struggling? Don’t fret. At the Kraff Eye Institute in Chicago, we have some of the country’s leading eye specialists who can diagnose concerns, offer excellent treatment plans and care, and help make sure your eye health is the best it can be.

Interesting results but hard to put too much stock into it with a sample size of 10. I know a lot of people who have no difficulty reading on LCD screens and some who even prefer it. But I also know some who just can’t do it for long periods of time. 10 people doesn’t seem near enough to draw any conclusions.

LED and LCD display are good to addict people to use computer that’s reason why e-ink tecnology is not developped for using as screen for monitors. A lot of money is made on top of those addicting tecnologies! Light is addictive! That’s my opinion!

I agree, the study does not sound scientific at all. And e-ink is way less straining, obviously, without the need for scientific study – but the thing is it has been studied and e-ink is proven to be healthier.

An e-ink monitor would make a lot of money for people who use the computer to work. It makes you wonder about the agenda of big corps who know that there is a huge market for eink monitors + it’s healthier nature but still refuse to do anything about it.

Besides it is common sense, the eye is going to be much better if it is not getting flashed by a screen, e ink is obviously better for the eye there is no question there, you dont even need to do a study it is just common sense like saying you need a test to prove that watching the sun directly is not that bad for your eyes.

I don’t notice a different either way. I’ve never had a huge problem reading onscreen. Yes, reading of any kind for long hours (and I’m an avid reader so I do it for hours on end) tires my eyes. It dries them out. I can’t read white on black comfortably. But other than that, it doesn’t really matter to me if it’s e-ink, my computer or a paperback. Thankfully laptop screens are a lot better these days (resolution and whatnot) because I work on one all day.

I caved in last week and bought a tablet (a Nexus). Using the Kindle app on that, provided the illumination is right, is just as pleasant as using my Kindle 3, but here’s the thing — after an hour or two I mysteriously find myself wanting to swap them. There must be some subtle difference between the screens. It’s good that the subject is now coming under scientific scrutiny.

The mooted demise of E-Ink may also be postponed (or even cancelled) because of E-Ink’s low power-consumption and the fact that E-Ink devices tend to have fewer onboard distractions.

Repeat this test, but now, use a monitor (instead of the Ipad) and an e-ink device which is propped up exactly like the monitor (and this last is very important!) Because that’s one huge difference between now and the last 30 years (beside the resolution, which I also think is very important).

It’s diminishing, but before the rise of the tablets, whenever people thought about reading from a screen, they envisioned a monitor. And not a device which you could hold in your hand so you could find a comfortable position.

Me, I’m using both systems with pleasure. Each has its strengths and weaknesses. I never noticed any tiredness after reading on my tablet for longer stretches of time. Unless I used it in a brightly lit environment. And I won’t even try to use my e-ink device in a darker environment as I must start to squint to even read and that’s very tiring!

for me, as much as anything else, it’s a matter of weight. The new eink readers are virtually weightless in my hands. Tablets are quite a bit heavier, and make my hands hurt. I find even my smart phone (a Droid Razr Max) is really too heavy for long use.

Well, the weight may be spread differently due to the way a person holds it. Not that I’m arguing the weight point. I do know several arthritic users in my cozy group love the e-reader they have because hardbacks are too heavy for them to manage without pain. I generally read on my laptop if not my Kindle and oh-boy, the kindle is a vast improvement in weight there!

Or the complaint about the weight might reflect a usability issue where the shape and interface of the smartphone is stressing the users hand, making them feel sore.

the screen size of the Droid Razr Max is 1.7 inches smaller than the Kindle’s, so it can fit less words of the same size. Over time, the Droid would tire the reader more.

Doesn’t look like they were comparing apples to apples. You’d have to have the same fonts, same font size, same size device, same resolution (or ability to range from the same to lower/higher resolutions), same lighting conditions, etc. and for good measure I’d throw in a couple scenarios – outdoor reading, indoor reading with adequate light and indoor reading with insufficient light. My take is that LCD reading has gotten much better with higher resolution screens and things like reading with black background/white text, but with screen glare, etc. e-ink is better in normal to bright light conditions. In my humble opini0n.

I say do the test again but strap the subjects into chairs and use an apparatus that forces their eyes open. Have violent and pornographic images pop up on the readers while classical music is playing. Then see what happens.

We believe that the "eye fatigue" found in previous studies may have been caused not by the LCD screen, but rather by the rabid wolverine clawing at the subjects eyeballs.

I always assumed that the eye fatigue caused by LCD screens was because people had the screen set too bright. When the screen is adjusted to the ambient lighting conditions I’ve never had a problem, but I see people reading LCD screens with the light so bright it would hurt my eyes. So perhaps in this test they set the brightness correctly, hence the difference with previous tests.

I always set my screen settings to lowest brightness, and reading on my LCD laptop screen still gives me tired eyes, and after a while slightly blurry vision and even spots for the eyes, plus it feels uncomfortable and makes me tired. I write, edit and read a lot on my laptop screen and these issues worry me and interfere with my productivity, so I am extremely eager to find a good quality e-ink monitor I can use with my laptop keyboard. A tablet screen is a bit too small but I would still prefer that if I could use it with my laptop keyboard, than looking at the LCD screen.

No colour or funky features are not a problem at all, but the refresh rate, font type, screen size etc needs to be convenient for writing and editing.

Anna, these are my thoughts exactly! I too have been longing for such a device: a laptop with an e-ink screen, or even a desktop computer with a e-ink monitor. Yes, black and white, yes, even with the less-than-stellar refresh rate!

This would suit perfectly my regular needs: working a lot with text processor, writing (literature and essays), doing translation work, proofreading for hours. Activities during which I need no distractions (colour, flash animation, videos, music…), just plain text work…

There are so many professionals who would love to have this alternative to the LCD screen. Writers, academics in the humanities and sciences, editors, proofreaders, even accountants and architects — jobs in which one has to view a screen for hours. Jobs in which the colors on screen are unnecessary and where the refresh rate is irrelevant.

Someone should invent this screen and it would sell massively to publishing houses, newspaper editorial offices, universities… and individuals like myself.

Its cheap marketing tactic of f**king cheater companies, e-ink screens are really awesome and i never had eye strain on my kindle, while on lcd and led i got eye strain within minutes.

[…] New study suggests E-ink is NOT better for your eyes than LCDs (The Digital Reader/Nate Hoffelder) “The results from the visual fatigue query were fairly close, though the LCD did rate marginally higher. Even the reading speed was virtually identical. In fact, the only major difference was when the test subjects were queried about general fatigue. LCD test subjects reported a higher general fatigue level than did E-ink test subjects, but that could be due to the size and weight of the iPad. E-ink is often described as being just like reading on paper, and that’s why the scientists were surprised to discover that the results were so similar.” […]

staring at a fucking fluorescent lamp all day is a hell of a lot different from staring at a relatively static field of ink bubbles all day. anyone who says other wise doesn’t live in this place called "reality".

If you work all day at a computer and have the serious related disorders (inability/delayed ability to focus at a distance, extreme light sensitivity) that can develop over time, then you know it’s the lighting that is to blame. You feel actual pain. You set the brightness as gently as you can while maintaining readibility, but it still hurts. There are eye exercises that help, and you learn to take breaks regularly. Setting a non-white background in applications that allow it helps (as it reduces brightness without affecting readibility). This study should have included people who actually suffer from this, as I do. Testing on people who don’t have the problem to begin with shows… no problem.

One study with 10 people is hardly conclusive. It’s barely even worth mentioning. Once more independent studies have been done and have a larger sample size, then we can start getting some answers.

My eyes get tired in just a few seconds (!!!) after looking at any modern LCD screen of any technology (amoled, ips and so on). However, I can read an average paper for tens of hours without any problem. The difference is huge at least for me.

twaddle. Who paid for this study? Who peer-reviewed the test conditions? We don’t even know that the same fonts and resolutions were used on both devices.

they had the people read for "a few hours". A serious study would need to take months, if not years. And it would have to involve people who like to read * a lot * and who are prepared to use a device a lot.

I read a lot, but I prefer physical books. I have just bought a Kindle Paperwhite and it deffo feels more comfortable on my eyes compared to all other devices.

I just wish the E-ink idiots would produce better and bigger devices and develop colour. Presumably they need BigCorp to step in with the readies. Why not tablets with E-ink? No doubt economies of scale would cause production costs to drop.

"E-ink idiots" is the best word to describe them! making expensive devices for doing ONLY ONE task which they fail to do properly! i just get headaches more often because of E-Ink devices" flashing than lcds" brightness!

That is the best word to describe you..first of all you are deliberately insulting people without knowing what you are talking about, probably because you have never suffered of strong eyes disease like me….due to that, not only i invite you to read the comments here to understand that probably you are alone thinking in that way, but before insulting the others by calling them "idiots", look yourself at the mirror of your home….thanks to Eink my life has changed forever, finally, after years of eyes pains, i can read digital documents without burning out my eyes anymore….

This study is absurd. I have problems reading articles on an LCD screen. My eyes get really red and tired. However on my kindle I can read for hours at a time.

Changes always come with age. I am 58 years old working in Finance. I have to sit through layers and layers of figures in excel. Unfortunately my tired and aged eyes have not been accustomed well to years of staring at an LCD screen. I would think it might have been different if i were instead staring at figures and letters on paper rather than a bright TV-like source. It just doesn’t feel natural.

In my case, as I’ve gotten older, I’ve found that a LCD screen is easier to read than paper, under the right conditions. I read ebooks off my tablet in a fairly dim room with the brightness of the screen turned down. If I have to read from paper, I have to turn up the ambient light up enough to irritate my eyes. I haven’t tried an eink screen, but I assume it would give me the same trouble.

I sincerely doubt that you spend 10 hours reading on you LCD screen. There’s a lot of glancing away, looking at pictures and scrolling down the screen. It’s not the same as reading a book for hours at a time.

[…] can cause discomfort, whereas e-ink looks similar to paper and so will not cause eye strain. A recent study in Ophthalmic and Physiological Optics, however, questions all of this. Participants were asked to […]

If you read in closed spaces, in optimal conditions, then there might be no notable difference. But if the light sources around you are varying (as it happens in real life – in the bus, station, on the beach etc.), then the results are completely different, as the LCD doesn’t reflect the outer light and it’s unable to adjust its emitted light to compensate for the variations. This is where the e-ink has a huge advantage, because it reflects the outer light and you’re actually reading in the light of the environment.

It is a huge difference in reading inside an office or outside in the sun shine. If you try reading from a LCD in place where the light varies and shines from your back, then your eyes will put in a lot more effort than if you read from e-ink in the same conditions.

People saying "e ink idiots" are idiots themselves. Don’t you people understand that compared to LCD technology, e ink is still in its infancy? Think of all of the monochromatic LCD devices you owned before the technology had the ability to be used for displaying complex images. Think of the Timex watch you owned back in 82, think of the calculator you purchased back in 93. You catch my drift? E ink was only in the theoretical stages through the mid nineties. All of the extra years of R&D provided to LCD would give it the obvious advantage. But even more important than than that, the technologies are both so fundamentally different. LCD is the natural choice for moving images and such, whereas e ink excels in the static image department.

Furthermore, for the past 10 years, LCD has been nearly the only available display technology for so many different applications (think computers, TV, tablets, hell even NASA flight simulators). On the other hand, e ink has been relegated to a single market (e readers). How do you think that will affect the speed of development and improvement?

This comment was written by a computer analyst who spends many hours of his day using LCD technology to perform his job. I am the owner of an LCD based smartphone, LCD based tablet and e ink based ereader. In my opininion, each technology currently serves its purpose well. If you’ve actually read this far, thank you for your time.

Indeed this study measures eyes strain on a very short period where everybody knows it takes years to damage eyes. Only a study lasting years could be significant here, would show how easy e-ink is for eyes after years not just a day or two !

I had a kindle 1 and then moved to the Kindle 2 Keyboard and then on to the Kindle Fire HD. The resolution of the Kindle Fire is amazing but after 2 months of use I’ve gone back to my kindle 2. The eink display is so much nicer to read for long periods.

I ride the train for 2 hours every day and I was unable to focus for that long with the kindle fire hd. With the Kindle 2 I have no problems. Train ride is over before I know it.

There is also the weight factor. The kindle fire with the case is pretty heavy. The Kindle 2 (without the big leather case with the light) is much lighter. The glare off the screen was pretty bad too on sunny days. I would have to look for a seat away from a window or I couldn’t see anything.

The problem of LCD screen is more the biological effect that does stimulate people, viciate them to use computer and make them sleep later. This probably one of a big problem! The manufacturers really odes not want to see people stop to use computer. That’s why we see this kind of study that do forget the most imoortant part.

Excuse me… 10 test subjects? This isn’t a mistake? 10? If so, this experiment does not deserve to be dignified with the name "scientific scrutiny". It is a well known fact – or at least it should be well known, at least in the scientific community! – that small samples routinely show such huge variations that they cannot be relied on. Example – choose a random sample of 10 Americans in a street, and you might well get only white males. So what – are we to conclude that America is populated by white men only?

Wrong! This is a classic layman’s mistake (we have an inborn tendency to draw sweeping conclusions from scanty evidence.) Any scientist, however, will tell you that small samples are notorious for giving highly skewed, highly misleading results.

The reason why the above example seems so convincing to you is because of pre-existing knowledge about what high-speed impact does to the human body. In other words, it confirms your well-founded expectations, and therefore it seems valid.

Out of 100 milion users of a certain supplement we choose a random sample of 10 – and they all give it a thumbs-up. What does it tell us about the supplement? Nothing. Because even if it DOESN’T work for 99 % of people (which makes it, for all intents and purposes, a complete failure), there is a milion satisfied users out there, out of which a sample of 10 could easily be chosen. So what conclusions can you draw? That it works OK for an unspecified number of people? As in from 10 to 100 milion…? What use would that be?

That fallacy was so obvious that I decided to not spend time on pointing it out, but I’m glad you did because perhaps someone would have fallen for it!

One of the wrongest thing i have ever read in internet in the last decade….i am the living proof that a eink screen has changed life of people with eyes problems forever….Before its invention, by using an lcd screen with whatever resolution you want, even fullHD, after half an hour my eyes WAS OUT!! now with a Eink screen i can read for 4 hours without stopping and without ANY sort of problems to my eyes……I can’t believe doctors and scientist are saying those idiot things….. I can show you with the help of my eyes doctor how both my eyes pressure and reddish color intensity change after i have spent 30 minutes in front of a even good LCD, and how they change in the same situation after 4 hours in front of a Eink screen……Finally thanks to Eink technology i am a man free to read all day long wikipedia articles! would you like to bet 1000 dollars that i am right and scientist are wrong? i am here with the money…write me an email and we will bet 1000 dollars…i am not joking….just come in Rome and i’ll present you my eyes doctor to prepare a test…..

Thanks for posting about this study; I looked up the article and read it. I would have been really interested in a comparison between e-ink, LCD, and paper, so I was sorry they didn’t include paper books as well. And it would have also been interesting if they had chosen an iPad with "retina" display; I would be curious to see what difference that made, if any. But I think for most people it’s probably just personal preference; they find a device that works for them and use it. For me, having gotten to the point where small print and dim lighting are problematic, I really like the larger screen (compared to the average e-ink reader), and adjustable font sizes on an iPad.

Despite the title of this post indicates that e-ink is not better than lcd, the article in which it is based only concluded that the lcd screens of nowadays are not that harmful as it used to be, and that can be assigned to improvements on resolution and bright levels of these new screens. What does not change is the fact that lcd screens emits light directly to the eyes, and this is harmful, even if it takes longer until you get tired of reading.

Yeah! Great feedback about having more people needed to be in the paper before we conclude anything (10 is too small a number). To me, this is a rash report to attack e-ink technology and cut down its sales. Do we want one useful technology to die just to please another technology’s dominance in the industry? This is a typical consequence when everybody jumps into this bandwagon. E-ink displays save electricity you know. I don’t want it to die.

The E-ink makers have advertised their products as being better for your eyes without producing any evidence to back it up. I hardly see it as "attacking" them to mention a study that refutes their claims.

I think the whole thing is kind of pointless myself. Ambient light seems to have more to do with eyestrain than what type of screen you read. I’d guess that going out in the sunlight where I live causes a dozen times as much eyestrain than reading either LCD or E-ink in normal light. I get the least eyestrain reading white text off a black background in a dim room.

With 10 people, this is not a representative study, and as you pointed out yourself, the participants using LCD had more issues with fatigue, and if the "scientists" were so surprised, why didn’t they test with actual paper as well?

Also I doubt the tests they did were appropriate for the issue, they should have done a test with viewing abilities in the dark as well, as that’s where you can see significant decrease when using a screen with lighting.

Reading can be tiring even with paper, it’s not a very natural thing to do either, letters, reading and all that is very much a humanly constructed thing, while it should be significantly easier on the eyes with actual paper, it still will be tiring to your eyes, just like with displays and even more so if you have light coming directly from it.

I don’t buy it. I’ve used both. E-Ink readers are much easier on my eyes. And I currently own a Sony PRS-600 (that I found for $10) — this is one of the few "modern" E-Ink readers that has a highly reflective screen. Why was this particular model chosen? To skew the results? The Nook Simple Touch, one of the Kindles, one of the Kobos, or one of the newer Sony Readers would have made a better test subject. Even the Sony PRS-650 went to the Infared touch screen instead of the "shiny" screen of the 600.

excuse my English level, I live in Czech Republic, Pilsen (famous Pilsener Urquell beer), and I am a fan of music- el.guitar. I read for about one year Joe Pass’s "Blues for Basie" from my LCD’s PC monitor, and I could not remember almost anything- the feelings was strange – I knew all the music and but I could’t remember the notes. So I printed the notes on a paper, and I learned the whole song in 14 days by heart. I bought Kindle 5, using it everyday for studying songs, and I rememer it in same way like from paper, very fast. I don!t know how it is possible, but I am not able to remember anything from LCD’s, but from E Ink display I remember anything much easier.

The problem comes when companies (ignorant executives, middle management, arrogant designers) add things which subvert this clarity and contrast, thus destroying one of two primary advantages of e-ink. For instance, adding a touch screen layer often lowers the clarity of the underlying e-ink to the point that you might as well just use a traditional LCD. (Additionally, but unrelated, adding wireless and lighting which cannot be turned off, kill the other advantage, which is power savings, and the ability to not have to recharge for months, rather than weeks as in many current devices.)

Prior to commenting, people should make sure that what they are basing their experiences on is really e-ink, and whether or not that e-ink is beneath a poor quality touch screen layer. Go find an e-ink device that does not have a touch screen to be sure, and then you will see what e-ink really looks like.

The mass digitization of books is changing the way information is created, disseminated and displayed. Electronic book readers (e-readers) generally refer to two main display technologies: the electronic ink (E-ink) and the liquid crystal display (LCD). Both technologies have advantages and disadvantages, but the question whether one or the other triggers less visual fatigue is still open. The aim of the present research was to study the effects of the display technology on visual fatigue. To this end, participants performed a longitudinal study in which two last generation e-readers (LCD, E-ink) and paper book were tested in three different prolonged reading sessions separated by – on average – ten days. Results from both objective (Blinks per second) and subjective (Visual Fatigue Scale) measures suggested that reading on the LCD (Kindle Fire HD) triggers higher visual fatigue with respect to both the E-ink (Kindle Paperwhite) and the paper book. The absence of differences between E-ink and paper suggests that, concerning visual fatigue, the E-ink is indeed very similar to the paper.

It’s obvious where this propaganda is coming from, afterall tablet industry makes billions of dollers for big companies and their babies anually, and the worst nightmare for them is a day that people stop spending their money on over prized gadgets.

this is not a study. this is a joke. 10 participants? and the higher level of fatigue from LCD might be due to the device being heavier?! come on, people, why do you even bother to publish such crap?

Responsible for performing installations and repairs (motors, starters, fuses, electrical power to machine etc.) for industrial equipment and machines in order to support the achievement of Nelson-Miller’s business goals and objectives:

• Perform highly diversified duties to install and maintain electrical apparatus on production machines and any other facility equipment (Screen Print, Punch Press, Steel Rule Die, Automated Machines, Turret, Laser Cutting Machines, etc.).

• Provide electrical emergency/unscheduled diagnostics, repairs of production equipment during production and performs scheduled electrical maintenance repairs of production equipment during machine service.

The picture above is a screenshot of my monitor’s display. Below is one small portion of it. Look carefully at the New York Times article and compare it to what you see on your own monitor, here.

Furthermore, this 21.5″ 1920×1080 monitor is 34 inches from my eyes, so that I can’t distinguish individual pixels. The enlarged text appears very crisp from this distance, and this means easier reading and less eye fatigue.

Sit far from the monitor and increase screen font size to increase effective resolution. See “Reduce Eye Fatigue” section below for how to calculate this distance for your monitor.

Can a widescreen monitor be used effectively for the first two uses? Yes. Many people do. And it may be ideal in certain homes where the display is used for both entertainment and light work. But if you’re trying to work without distraction for hours at a time, you may find that a widescreen monitor will lead you down the dark path of multitasking unrelated activities.

I tried for two years to use a 24”, 1920×1200, widescreen monitor effectively at my office, because I often find myself flipping back and forth between writing and researching. I failed. With the combination of a widescreen monitor and a tabbed browser, I too often succumbed to multitasking unrelated activities.

I had other issues with the wide screen. The short monitor height required too many clicks to scroll through long articles. I couldn’t use fullscreen mode because text stretched super wide. And though tools like Readability or Readable could be used, much of the screen space was wasted with wide margins.

I did distracted myself with many experiments to try to improve the situation, including various utilities or plug-ins designed to manage large screens or block distraction. It turns out that most content is meant to be displayed vertically, and this is assumed in computer software and operating systems. I found myself constantly battling this vertical display assumption, and often losing. So after two years of reduced productivity I gave up on widescreen monitors.

Now I have the best of both worlds. I have a widescreen monitor, but it can pivot into a vertical position. It is in vertical position over 95% of the time.

Steve Jobs claims that you can’t distinguish individual pixels on a device with more than 300 PPI such as the iPhone 4 or iPod Touch 4g, which both have a 326 pixels per inch (PPI) “Retina Display.” He’s right. That is likely the main reason my eyes get less tired with this device than any other LCD display I’ve used.

This display is so good that the iPod Touch 4g makes for a great e-reader. So I began to wonder: could I get a display this good for reading on my computer?

Have you ever noticed how a massive HDTV looks great 6 or more feet away, but not so great close up? You can see the individual pixels on a 46” HDTV if you’re 3 feet away, but not if you’re 6 feet away. The same principal applies to an LCD display. Move it twice as far away, and you’ll only be able to distinguish half the detail.

The distance (in inches) at which people cannot distinguish individual pixels can be calculated with this simple formula (see this Discover article for details). Note that PPI is Pixels per Inch:

In other words, you cannot distinguish individual pixels on a 326 PPI Retina Display that is more than 10.55 inches away from your eyes unless you have better than 20/20 vision. The same applies to my 103 PPI monitor at a distance of greater than 33.4 inches.

So doesn’t putting a monitor so far away make it difficult to read tiny type? Yes, but that’s not a problem. I just increase font sizes. To do this in a browser, type control+ on Windows, and command+ on Macs. Or you can use the Readability or Readable bookmarklet with a large font selected.

Enlarged text nearly three feet from my eyes is very easy to read. Another subtle benefit is that page elements such as tabs, menus, and status bars do not get larger. They look tiny relative to the enlarged text, so they’re less noticeable and less distracting.

Note that by enlarging your web pages or documents, you do end up with less information on the screen. I find that I don’t usually need 1920×1080 pixels worth of information on a screen at one time. But when I do, I can simply move the screen closer to my eyes. Yes I lose the benefits of having the equivalent of a Retina Display, but the trade-off is sometimes worthwhile, particularly with large spreadsheets.

Read a web page with more than a few hundred words, and you’ll need to advance the page using a mouse click or your keyboard’s “page down” key. If your work involves reading hours per day, you may do this hundreds of times per day.

For example, my Dell 21.5″, 1920×1080 monitor (HDTV resolution) can pivot between vertical and horizontal positions. The vertical position means 1920 pixels of vertical space devoted to a web page, while a horizontally positioned screen means only 1080 pixels of vertical space

You could theoretically get the same amount of text on the screen by filling up the entire monitor with your browser, but that stretches the text very wide. It is very difficult to read text which has 150 characters per line. Various studies show that people can read fastest at somewhere between 60 and 95 characters per line, which is what I get by positioning my monitor vertically, 34 inches away, with enlarged text.

The advantages of working using the cloud are numerous, but endless web distractions can lead to wasted time and feelings of information overload. I’ve discussed tools for reducing distraction for both writing and reading on the web. These tools work well on vertical monitors but poorly on widescreen monitors.

For example, the simplest distraction blocker is to simply put your browser into fullscreen mode by pressing the F11 key. Try it on a widescreen monitor and you’ll see your text stretches so wide that there’s more than 150 characters per line. This is difficult to read.

Fullscreen mode works as intended on a vertical monitor. You eliminate menus, toolbars, address bars, bookmark bars, and status bars. You also get more vertical space so you’ll display more of what you’re reading, leading to fewer clicks to read a long article.

My favorite distraction blockers these days are tools like Readability or Readable. Readability is built in to the Safari browser and it can be added to Firefox or Chrome with plugins. You can also use Readability or Readable bookmarklets on any browser. These tools do work on widescreen monitors as you can specify the text width, leaving wide margins. But using these tools on a vertical monitor is better because much more text is on the screen, which means less clicks when reading a long article.

There are times when it truly is helpful to have two Windows displayed simultaneously. You may be writing while frequently consulting one or more sources. Perhaps your work requires you to monitor numbers, graphs, or images from several different points of view. So what setup works best for this?

Get a second monitor. You’ll need to make sure that your computer has the graphics card and software to support it and that you have enough desk space. If you need to spend many hours per day with two or more windows displayed, this is the best solution. You can always turn off one of the monitors if it’s a distraction.

Inexpensive 19″, 1280×1024 monitors will do. But with 86 PPI, these monitors need to be 40” away to achieve the equivalent resolution of a Retina Display that is 10.55 inches from your eyes. Worse, you’ll need to enlarge the text in order to read it and then won’t be able to see much more information than you can on an iPod Touch. More likely is that you won’t want to position your 1280×1024 monitor so far away, so you’ll notice the individual pixels.

Luckily, high quality 1920×1080 monitors can be purchased for $150 to $400 these days. The diagonal length of monitors with this resolution ranges from 21.5” to 26”, but the larger sizes of these monitors usually cannot pivot. Furthermore, the bigger the monitor is, the farther you’ll need to place it away from your eyes.

UPDATE (11/12/14, 7/25/16): Though I still happily use my U2211H, it has been replaced by updated and rebranded Dell models since this post was written. More importantly, the matte anti-glare coating has been improved to eliminate the “graininess” some people noticed on the U2211H. If I were buying today, I would buy:

The 21.5” diagonal screen size was the smallest I could find on a 1920×1080 monitor. It needs to be only 33.4” from my eyes (to achieve the same effect as a Retina Display at 10.55 inches), as opposed to the 37.5” required for a 24” display. Closer is better so I don’t have to lean forward as far when I need to look at something small.

Having failed to make good use of a widescreen monitor after two years of trying, I’ve obviously given up on them in the office. But many people use them for home entertainment purposes. And some people are very productive with them. Maybe you’re one of them, and you’d like to share about it below.

I’d love to hear about useful alternatives and so would my readers. So please share your comments below about your own experience with monitors or any other related words of wisdom you may have. Thanks!

I’m a dad with a son who loves baseball. Professionally, I’ve been a software developer, investor, controller, and logistics manager. I now make my living from this blog, supplemented with occasional consulting gigs.View all posts by Joe Golton

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The television is one of the most common electronic in any household. Even in the age of digital media, people choose to spend their free time at home with their families watching television.

Some people are hooked to watching show after show, putting their eyes at risk. But screen type is not the only factor in eye-healthy screen time. It really depends on the TV brightness, room lighting, distance from the screen, and view time. How? Let’s break it down:

Whatever type of television you have, it emits light with most TVs emitting at least 50% of blue light. Because blue light is closer to UV rays on the light spectrum, it may have similar qualities to how it affects people. Blue light exposure has long been linked to health issues such as eye damage, vision loss, and insomnia. So, as the brightness of your TV is increases, the color, and contrast of the image decrease, causing eye strain.

Ambient lighting should be present in the room when watching TV. It’s not a good idea to watch TV in complete darkness -- yes we’re talking to you late-night viewers. The room’s brightness should be adequate and comparable to the television. Even in theaters, the lights are never completely off, just dimmed; that same rule should apply to your home.

The closer you go to the television, the more your eyes begin to strain. For both kids and adults, it is not necessary nor healthy to sit close to the screen. The basic rule is to sit at least five times as far away from the screen as it is wide. So, if your television is 32 inches wide, for example, the ideal viewing distance is 160 inches or around 13 feet.

The recommended viewing distance for televisions with 4K resolution is one and a half times the screen size. The recommended distance for HDTVs is three times the screen size of the TV. These guidelines also go for children, who may be the biggest culprits in non-safe viewing practices. If you must, rearrange your living room to space out the good seats away from the TV.

How does that translate into TV screen types? And what screen type should people use to better protect their eyes when watching various shows on television?

The most common display technologies are LED and LCD. The latest TV display technology is OLED, which is only available on high-end TVs. The pixels used to provide the display are the difference between LCD, LED, and OLED. When compared to LED backlight, OLED has a far higher resolution and delivers cleaner, better graphics.

An OLED (Organic Light-Emitting Diodes) screen consists of numerous pixels that emit its own light. Each pixel is made up of three separate RBG – red, blue, and green – OLEDs. OLEDs are true emissive components that produce light on their own and do not require a light source. Meaning they produce a light that’s more natural and less harsh on your eyes.

OLED TVs also provide excellent color and contrast because they do not use light from other sources to display colors, as LCD/LED TVs do. They also, on average, produce around 20% less blue light than LCD displays.

Both LCD and LED TVs work in similar ways to each other. The only difference between the two is the type of backlighting. A TV labeled as an LED utilizes LED illumination for the white backlighting instead of fluorescent (CFL) lamps.

While LED LCD TVs are more appealing than CFL LCDs, they cannot compete with OLED panels since the LCD/LED front panel is a liquid color display that is not self-emissive. Which is the biggest disadvantage of LCD/LEDs in terms of eyesight. Although they produce quality images, the color and contrast from these displays are due to their light sources, so they give off more brightness that can cause eye strain if not moderated.

To sum it up, OLED displays are better for your eyesight. They have more natural lighting, better color contrast, and a wider color range. However, no matter what type of display you have, you will hurt your eyesight if you don’t practice safe TV viewing.

Staring at the computer all day is horrible for your eyes. All those brightly colored pixels clashing with the lighting around you while you stare at your screen for hours on end—it"s a recipe for eye fatigue, muscle strain, and headaches.

By adhering to a few simple guidelines and by making some physical adjustments to your workspace, you can avoid putting too much strain on your eyes. Here are some tips to make your workday healthier.

Follow the 20-20-20 rule. Look away from your screen every 20 minutes for 20 seconds at a time and focus on a fixed point 20 feet away. There"s even a free web app that alerts you after 20 minutes has gone by so you know it"s time to give your eyes a rest. It"s called Protect Your Vision and it"s compatible with Chrome, Firefox and Safari.

Position your screen 20-30 inches away from your face, and make sure your eyes are level with the very top of your monitor. If you don"t have ability to adjust your screen"s height, stack some hardcover books beneath it. Raising or lowering your chair can also help. The key thing to remember is that you should be looking slightly down at your work. The center of the screen should be located between 15 and 20 degrees below horizontal eye level.

A good rule of thumb: Text should be three times the smallest size you can read from a normal viewing position. Again, that normal position should be 20 to 30 inches from your monitor. When it comes to color combinations, your eyes prefer black text on a white or slightly yellow background. Other dark-on-light combinations work fine for most people. Avoid low contrast text/background color schemes.

If you wear contacts, your eyes have to work harder when staring at a screen. Switching to glasses once or twice a week will help reduce the onset of eye strain. If you do wear glasses, consider asking your optometrist to add an anti-glare coating to your lenses. This will cut down on Some providers will even add it at no extra charge. Whether you wear corrective lenses or not, moistening eye drops are great for refreshing your eyes during the workday.

You want your monitor"s brightness to match your surrounding workspace brightness. To achieve this, look at the white background of this page. If it looks like a light source in the room, it"s too bright. If it seems dull and gray, it"s probably too dark. If you work in a shiny reflective office, applying a glare reduction filter to your screen can also provide relief.

Most monitors let you adjust the color temperature manually. It"s best to use a warmer (yellowish) color temperature in dark rooms and a colder (bluer) color temperature in bright rooms. The easiest way to optimize your monitor"s color temperature is to use F.lux. This app uses your computer"s location to determine whether the sun is up or down, then it automatically adjust your display to pre-determined color temperatures that best match the natural lighting environment.

Color temps are measured in degrees of Kelvin, with the scale ranging from 1,000 to 10,000. During the daylight hours, it"s best to keep your monitor relatively cool with a default color temperature of 6,500K. At night, the color temperature should be warmer, and around 3,400K. You can adjust your monitor"s settings manually, or you can let f.lux make the changes for you. The app also has some presets with specific color temperatures that you can select from.

F.lux is free and available on Mac, Windows, Linux, iOS, and some Android devices. If your Android phone can"t run the F.lux app, you can check out Twilight. The app performs a similar function by reducing the blue light of your phone and warming the color temperature during evening hours.Get more tech news with our Gadget Lab podcast, available on iTunes and Spotify.

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Retina Display is a brand name used by Apple for its series of IPS LCD and OLED displays that have a higher pixel density than traditional Apple displays.trademark with regard to computers and mobile devices with the United States Patent and Trademark Office and Canadian Intellectual Property Office.

The Retina display debuted in 2010 with the iPhone 4 and the iPod Touch (4th Generation), and later the iPad (3rd generation) where each screen pixel of the iPhone 3GS, iPod touch (3rd generation), iPad 2 was replaced by four smaller pixels, and the user interface scaled up to fill in the extra pixels. Apple calls this mode HiDPI mode. In simpler words, it is one logical pixel = four physical pixels. The scale factor is tripled for devices with even higher pixel densities, such as the iPhone 6 Plus and iPhone X.

The Retina display has since expanded to most Apple product lines, such as Apple Watch, iPhone, iPod Touch, iPad, iPad Mini, iPad Air, iPad Pro, MacBook, MacBook Air, MacBook Pro, iMac, and Pro Display XDR, some of which have never had a com