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

    • Microsoft releases major feature updates for stock Windows 11 apps by Taras Buria In addition to releasing new Windows 11 preview builds, Microsoft announced that inbox Windows apps now have dedicated release notes in the official documentation. At long last, users have access to all the release notes for each app, with changes listed in chronological order. Microsoft used to announce feature updates for stock apps with each build. Now, with Windows Insider release notes hosted on the Microsoft Learn website, each app has a dedicated space for its changelog, which is very useful for those who want to track new features and improvements. Alongside that, Microsoft dropped massive feature updates for six stock apps: Clock, Media Player, Calculator, Voice Recorder, Photos, and Paint. Each app packs quite a lot of changes and new capabilities, so here are the release notes. Here are quick notes so that you can jump to the app you are interested in the most: Calculator Camera Clock Media Player Paint Photos Sound Recorder Here is what is new for the Calculator in version 11.2605.9.0: More accurate square-root results — Fixed rare cases where a calculation that should equal zero (like sqrt(2.25) - 1.5) returned a tiny leftover value instead. Readable text in High Contrast themes — Settings text now shows the correct colors in the High Contrast Aquatic and Desert themes. Fixed layout for right-to-left languages — For languages like Arabic and Hebrew, the graph, number pad, equation fields, and scroll buttons now appear correctly oriented. Reliable launch after upgrading — Fixed an issue where upgrading from much older versions could leave outdated settings that stopped the app from opening. Here is what is new for the Camera app (version 2026.2605.7.0): Zoom slider works on more cameras — The zoom slider now works on the latest cameras, respects your system zoom settings, and updates instantly when you change those settings. Full range of zoom levels — Fixed an issue where the zoom slider only showed three steps on some devices that zoom in finer increments. Front camera works on more devices — Resolved a problem that blocked the front-facing camera on certain wide-angle devices. More video resolution choices — You can now pick video resolutions that were previously hidden; the app shows a heads-up warning instead of removing them. QR links you can still use — When a scanned QR code points to something with no matching app, the link is now copied to your clipboard (with a notification) while still offering a Store search. Smarter default settings — When you haven't set a preference, the app now follows your system settings by default. The Clock app has a massive changelog with the following improvements in version 11.2605.9.0: Timers keep counting after they hit zero — When a timer runs out, it now keeps counting up (for example, -00:27:31) so you can see how far past the time you've gone. You can turn off the daily goal — Focus Sessions now include an "Off" option so you can skip setting a daily goal entirely. New 15-minute snooze option — Alarms now offer a 15-minute snooze interval. Run up to 3 countdowns at once — The Countdown Widget now supports three simultaneous countdowns, up from two. Timer Widget notifications now appear — Fixed an issue where the "timer finished" notification didn't show when the timer was started from the widget. Less clutter in Focus Sessions — Tasks you've already completed no longer show up in the Focus Session task list. More accurate focus progress — Fixed a rounding issue that could show your daily focus progress as a minute short (for example, 49 minutes instead of 50). Smoother World Clock comparisons — The World Clock compare page now loads dates as you scroll, so it feels more responsive. Up-to-date World Clock locations — Refreshed country and city names to match their current names. Correct sun and moon icons during midnight sun — Fixed an icon that wrongly showed a moon during all-day daylight in polar regions. Fixed back-button behavior in clock comparisons — Pressing back once now takes you back as expected, instead of jumping the date to 1926. Corrected the Newfoundland time zone — Newfoundland now uses the right time zone (St. John's). Disabled alarms stay looking disabled — Editing a turned-off alarm no longer makes it appear turned on. Cleaner timer cards — The expand button is now turned off on timer cards that have no time set, preventing actions that wouldn't do anything. Clearer theme setting — Updated the wording to "Choose your preferred app theme." Smoother Settings links — The "About" links in Settings no longer trigger an unexpected "switch apps" prompt. Fixed spacing in Spotify settings — Corrected uneven spacing in the Spotify settings card. Better focus visibility in High Contrast — The focus highlight in World Clock is now clearly visible in the High Contrast Aquatic and Desert themes. No more double announcements — Screen readers no longer read the timer value twice. Countdown names read correctly — Screen readers now properly announce the name of each countdown. Keyboard focus stays put — Focus no longer disappears after you press the Timer Reset button. Clearer alarm toggle for screen readers — Tidied up how the alarm on/off switch is announced. The Media Player app received plenty of changes as well (version 11.2605.14.0): Custom captions — You can now personalize how closed captions appear, with caption styling tied to your Windows caption settings, plus a quick link to open those settings directly. "Indexing" banner in the play queue — When your media library is still being scanned, a banner now explains why some items may not appear yet. Fixed the look of selected items — Corrected a layout glitch with selected items in lists. Fewer playback failures — Improved how the app recognizes supported file types, so more files play without issues. Playlists need a name — You can no longer accidentally save a playlist with a blank name. Cleaner look for empty playlists — Improved how a playlist appears when it has no items yet. More stable play queue edits — Fixed a crash that could happen when changing the play queue while the app was switching between sessions. Clearer "missing codec" message — Improved the dialog that appears when a file needs a codec you don't have, with clearer guidance on what to do. A big update is also available for Paint in version 11.2605.61.0: Adjustable eraser transparency — You can now control how transparent the eraser is. Cleaner stamp brush strokes — Fixed visible color shifts and artifacts when using stamp-style brushes. JPEG photos save in place — Opening a rotated JPEG and pressing Save now overwrites the original instead of unexpectedly prompting "Save As." No more crash on bad image files — Opening a damaged or invalid image, from within the app, by double click, or commandline, now shows a clear error message instead of closing the app. Classic selection behavior restored — The selection outline now hides while you move, resize, or rotate a selection, just like in classic Paint. Tidier AI image panel — Fixed missing spacing at the bottom of the AI image generation panel for a cleaner layout. Visible button hover in light theme — Toolbar split buttons now show a clear hover highlight in the light theme. Snappier toolbar — Streamlined how the ribbon lays out, giving a small speed boost at startup. Fewer background crashes — Fixed a crash that could happen while background tasks were finishing up. Stable app shutdown — Prevented rare crashes when closing the app. Fixed layer removal glitch — Deleting the active layer no longer leaves the layers list in an inconsistent state. Here is what is new in the Photos app (version 2026.11060.2004.0): AI watermarking — AI-generated or edited images can now carry a visible Copilot watermark. You choose Never, Always, or Ask Every Time in Settings, with a confirmation when saving. The watermarking is off by default in settings. Better viewing of small images and pixel art — Tiny images (like 16×16 pixel art) now zoom in far more to fill the screen and stay crisp instead of looking blurry. Select scanned text with the keyboard — When text is detected in an image, you can now navigate and select it using the arrow keys, Shift+Arrow, Home/End, and Ctrl+A, with a clear focus highlight. Fixed a crash in text recognition — Resolved a crash that could close Photos while detecting text in images; the app now recovers gracefully. Easier keyboard navigation — Tabbing through the navigation bar no longer stops on hidden controls, so it takes a single Tab to move past it instead of three. And finally, here is the Sound Recorder (version 11.2605.1.0): Waveform shows with Bluetooth mics — The live waveform now displays correctly when you record using a Bluetooth audio device. No more stray scrollbar — A non-working horizontal scrollbar no longer appears at the bottom of the waveform unless you've zoomed in. Mark button ready right away — The Mark button no longer looks grayed out until you hover over it after opening the app. Markers hidden for WAV files — Markers are now turned off for WAV recordings, since that format can't store them — so they're no longer lost silently. Smoother deleting — Quickly pressing Delete and Enter to remove several recordings in a row no longer triggers a "file doesn't exist" error. Fixed a memory issue — Resolved a memory leak that occurred each time a recording started. You can find all these changelogs in the official documentation here.
    • again, an article about Microsoft Edge and ridicules hater's comments
    • From this very same article: "For organizations that prefer a “more deliberate pace”, the Extended Stable channel remains an option."
    • Or every other browser, because they all behave the same, at least the mainstream ones. Firefox does exactly the same: background updates, restart to install them. Haters gotta hate, I guess.
  • Recent Achievements

    • Very Popular
      AndrewSteel earned a badge
      Very Popular
    • Veteran
      Taliseian went up a rank
      Veteran
    • One Month Later
      Clizby earned a badge
      One Month Later
    • One Month Later
      Timaximus earned a badge
      One Month Later
    • Week One Done
      Timaximus earned a badge
      Week One Done
  • Popular Contributors

    1. 1
      +primortal
      494
    2. 2
      PsYcHoKiLLa
      166
    3. 3
      +Edouard
      162
    4. 4
      Steven P.
      86
    5. 5
      ATLien_0
      77
  • Tell a friend

    Love Neowin? Tell a friend!