Do LCD monitors affect vision?


Recommended Posts

Hey, i knew this long time ago, but i wasen't too sure, right now i have a normal 15" monitor...and i do need glasses to see 'far' i also heard that LCD monitors dont affect ur vision meaning u can sit all day and it wont affect your eye sight liek the normal huge @$$ monitors do...So is this true? if they are the same.. how much difference are lcd than the normal fat monitors? :ninja:

thx

ps sory if i posted in wrong thread : :blush:

Link to comment
https://www.neowin.net/forum/topic/246017-do-lcd-monitors-affect-vision/
Share on other sites

If you mean radiation, yes, the LCD's are 'safer' since they emit less of it. Not that a CRT would make you sick, though.

584947238[/snapback]

How less? do you know? or can u find some site that says like normal monitor: blah blah radiation, LCD: 50% less or something..Thx

i thikn my eye sight is getting worse and worse, and i want it to stop..but i cant really avoid computers because i do all my work on them (hmwk, etc) and stuff..I dont have $400+ but i think i have around $300 so any decent lCd/crt monitors for that much in canada? [ont]

A major difference between CRTs and LCDs is that LCDs don't flicker like CRTs do. CRTs flicker 120 times per second (in north america, 100 times per second in the uk) due to the AC power cycle. It's faster than our eyes can see, although if you record a CRT on video camera you'll see lines through it due to the flickering. This doesn't happen on LCDs, as it's light is provided by DC power instead of an AC power. As a result they are easier on your eyes.

A major difference between CRTs and LCDs is that LCDs don't flicker like CRTs do.  CRTs flicker 120 times per second (in north america, 100 times per second in the uk) due to the AC power cycle.  It's faster than our eyes can see, although if you record a CRT on video camera you'll see lines through it due to the flickering.  This doesn't happen on LCDs, as it's light is provided by DC power instead of an AC power.  As a result they are easier on your eyes.

584947434[/snapback]

thanks for the explanation

yar.. yesterday i was playing some games on the computer for several hours then started geting a headache.. seldom experience this although i get headache quite often.. even when its not computer related.

could it be because my exams are like just over and suddenly im back to using the computer? im not sure..

but i see my friends lcd screen is like much more soothing on the eyes.. hopefully i can get one :)

A major difference between CRTs and LCDs is that LCDs don't flicker like CRTs do.  CRTs flicker 120 times per second (in north america, 100 times per second in the uk) due to the AC power cycle.  It's faster than our eyes can see, although if you record a CRT on video camera you'll see lines through it due to the flickering.  This doesn't happen on LCDs, as it's light is provided by DC power instead of an AC power.  As a result they are easier on your eyes.

584947434[/snapback]

Isn't the flickering due to the monitors refresh rate?

i was honestly thinking about this today...

how muh radiation do monitors put off... and some cases too :s

i know TV puts off alot of radiation, but oh well, were surrounded by it, its time we get use to radiation lol

Didn't Macs by default have something like 100hz, while most PC monitors are set to 70hz?

Isn't having I set higher better? I don't know.

I think I'm talking out of my ass on this one...

584947593[/snapback]

Well I know you got the part about the refresh rate right, higher is definitely better as higher refresh rates reduce flickering which in turn reduces eye strain.

Didn't Macs by default have something like 100hz, while most PC monitors are set to 70hz?

Isn't having I set higher better? I don't know.

I think I'm talking out of my ass on this one...

584947593[/snapback]

No, graphics cards and monitors are practically the same on PCs and Mac (sometimes exactly the same). The technology used on both platforms is the same except for the processors and mainboards. The rest (internals like RAM, hard drives, sound chips, etc etc.) comes from the same factories, believe me.

LCDs are certainly the "in" thing these days, but like everything else have their ups and downs. While they certainly look sweet, and are major space savers, be aware that there are inherent limitations with LCD technology.

If you are an average user, who surfs the web and listens to music, etc., then an LCD is fine for you. But if you are into gaming, are a videophile, or use applications where image quality is very important (photo editing, video), then be aware of the fact that LCDs have poorer brightness levels, contrast ratios, color saturation, and refresh rates than traditional (CRT) monitors do.

Refresh rate: for gaming, your display needs to be capable of updating at least 60 times/second. Typical (cheap) LCD displays with a 25ms "response time" are only capable of updating 40 times/second. Therefore, fast moving objects on the screen tear, and leave slight trails (blur). You will need to get a monitor with a 16ms response time or lower if you are into gaming. 16ms = 62.5Hz refresh rate. Even better is 12ms, which updates ~83 times/second. That is in the range of a typical CRT (75-85Hz.) Usually 85Hz or higher is preferred for gaming, depending on the capabilities of the monitor.

Brightness and Contrast Ratio: an LCD cannot match the light output or contrast ratio of a CRT--at least not yet. An LCD display cannot render true black. That is a side-effect of the technology used. You will see LCDs listed with "Contrast Ratio" specs of 250:1, or 400:1, or 700:1. The higher the better. Basically a 500:1 ratio means that the brightest spot on the monitor (100% white) is 500x brigher than the darkest spot (100% black.) CRT displays CAN show absolute black, and so the contrast ratio between black and white is infinite. The result of this is that you can only get the true range of shadow detail on a CRT device. This is true for televisions as well: LCD- or DLP-based tvs, which are all the rage nowadays, cannot render the shadow detail that a CRT-based tv can.

All that being said, LCDs are still a good choice, as long as you know what you are getting into. Buying an LCD monitor that approaches the quality of a good CRT monitor is not going to be cheap. Buying a 17" flat panel with a 16ms response time, and greater than 500:1 contrast ratio, will set you back around $500 US. You can buy a good 21" CRT monitor for that price.

I've noticed that when I use anything below or above 70 hz my eyes seem to hurt a little more.  70hz at 1280x1024 is perfect more me.  I can't even stand to look at 60 hz, esp when windows 2000 boots up.  Has anyone ever noticed that?

584947714[/snapback]

Yes, I notice right away when I see a monitor at 60Hz. I can?t stand it.

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • They thought value of their goods would forever only drop like it used to and didn't account for sudden increase in price because of all the Ai hype. Tough luck Samsung, don't try to weasel this one out. Also American customer protection laws are a**. In Europe, you need to be compensated for a functioning product of same or better characteristics (not same price point as when it was originally bought!) if it can't be repaired and when you receive a replacement product your warranty starts from scratch because you received a different item than you previously had and old warranty thus cannot apply to it anymore. If your actual item was successfully repaired, warranty gets extended for the period the item was in service. If item is repaired to a significant extent, warranty also starts over from scratch because major part of it was replaced. Americans need to fight to get this kind of consumer protections because they are constantly getting screwed over.
    • Microsoft releases new Windows 11 Media Creation Tool with the latest updates by Taras Buria Patch Tuesday updates arrive every month, bringing users new features and security updates. To make sure customers have access to the most recent images, Microsoft also releases updates to the Media Creation Tool app, its official utility for Windows 11 installation. Today, the company pushed new ISOs to Media Creation Tool, allowing you to create images with the June 2026 Patch Tuesday updates. With the latest update, the Media Creation Tool now downloads KB5094126. It is Windows 11 version 25H2, build 26200.8655, which is also available via Windows Update. Note that the app itself remains on the previous version, which you can check in Properties > Details. The only change is that it now downloads a more recent Windows 11 build, so the only way to check is to download an ISO. The June 2026 Patch Tuesday update is a special release for Windows 11, as it brings a new performance profile to make the operating system more responsive and snappier when rendering various user interface surfaces, including the Start menu, quick settings, and more. It does so by spiking processor speeds for a brief moment, resulting in higher loads for a second or two. The so-called “Low latency profile” is rolling out gradually, but you can force-enable it with the ViVeTool app. Other changes include webcam improvements, Task Manager updates, shared audio support, and more. You can download the Media Creation Tool app from the official Microsoft website using this link. Besides MCT, Microsoft lets you download Windows 11 ISO as a file directly from the official Windows 11 website. However, you will need a third-party app to write it to your USB drive. Check out this guide if you want to know how to do that.
    • Louis Rossmann suing Samsung over "990 Pro SSD warranty scam" by Sayan Sen Back in 2023, if you recall, Neowin reviewer Robbie Khan had a dispute with Samsung over his 990 Pro SSD, which was rapidly losing its health. After significant back and forth, the tech giant had finally released firmware to "stop" the issue. Interestingly, its previous flagship at the time, the 980 Pro was also facing problems leading to two consecutive sets of firmware fixes. Three years later, it looks like a similar conflict has now broken out between tech repair entrepreneur YouTuber Louis Rossmann and Samsung, as it has escalated into a threatened lawsuit after the company allegedly refused to appropriately replace a failing 990 Pro SSD that remained under warranty. According to Rossmann, a 4TB Samsung 990 Pro NVMe SSD purchased for approximately $330 less than two years ago, began experiencing major hiccups and issues, even though he claims it had been operated under ideal cooling conditions. It was installed in a RAID 1 array and cooled by a heatsink and dual high-speed fans. However the drive reportedly started dropping out of the array, exhibiting controller-level failures that eventually became not useable in any meaningful way. Rossmann said Samsung’s support process was marked by delays and confusion from the very start. After initially contacting the wrong regional support channel, he was redirected to Samsung’s memory support division where he submitted detailed diagnostics, logs, and proof of purchase. Rossmann runs a repair company and owns an ACE Lab PC-3000 machine, which is a professional-grade data recovery equipment. As such, he had been confident in his diagnostics. Samsung even seemingly acknowledged that later. Regardless, Rossmann claims that his initial support ticket was automatically closed before a full 24-hour response window had elapsed, forcing him to reopen the case and resubmit documentation. The controversy however intensified further from here after Samsung accepted the drive for warranty evaluation but later returned it with a repair report stating that the drive had passed its testing and that the SSD had been verified as functional. Rossmann strongly disputed those claims citing that his own independent testing on PC-3000 showed write speeds reducing to as low as 40–60 MB/s before the drive failed entirely. Samsung subsequently informed him that the SSD had been reset and reflashed, passing internal stress tests. However, the company also stated that replacement units were unavailable due to an industry-wide memory shortage and suggested that a refund process could be initiated if further testing confirmed the fault. Thus, to settle, the company offered a refund of $330, the amount that was initially paid by him to make the purchase. Here, Rossmann pointed out the seeming hypocrisy of the tech giant as in how no Samsung drive was apparently allocated for warranty replacements, but they were abundantly available for retail sales especially when using business accounts. As you can see, Rossmann is indeed right, there are Samsung 990 Pro 4TB SSDs on Amazon currently for $950 (shipped and sold by first-party Amazon US itself), and they are also available on Samsung's own store too, albeit for an even higher price of $1100. Thus Rossmann argues that Samsung’s inability or unwillingness to provide a replacement while the same model remains available for purchase at significantly higher market prices reflects a failure to honor its warranty obligations. He has issued a formal 60-day notice and says he intends to file suit in Texas small claims court, asserting that companies should face greater costs for denying legitimate warranty claims than for fulfilling them. You can check out the full video titled "Samsung's 990 Pro SSD warranty policy is a scam; I'm taking them to court," at the link below. Source and image: Louis Rossmann (YouTube) As an Amazon Associate we earn from qualifying purchases
    • Was it too much to ask to show the icon in this article?
  • Recent Achievements

    • Week One Done
      davidbazooked earned a badge
      Week One Done
    • One Month Later
      Jamswaz earned a badge
      One Month Later
    • Week One Done
      Jamswaz earned a badge
      Week One Done
    • Rookie
      Marzoid went up a rank
      Rookie
    • Community Regular
      coch went up a rank
      Community Regular
  • Popular Contributors

    1. 1
      +primortal
      509
    2. 2
      PsYcHoKiLLa
      185
    3. 3
      +Edouard
      158
    4. 4
      Steven P.
      83
    5. 5
      ATLien_0
      75
  • Tell a friend

    Love Neowin? Tell a friend!