120HZ Monitor, will it help with eye strain?

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+1 60Hz for LCD is fine becasue it is always lit, only changes pixel color when refresh, it does not turn it off. On crt's there is one beam that scans the screen and lits pixels one by one, by the time it returns to the same pixel it has faded to dark. Check the photos taken of crt's You will see black lines on them where the pixels has faded out. On LCD photos You will see full screen because it is always lit and just changes pixel color /brightness when refreshed. I can see CRT's flicker at 60Hz but most of the people cannot see it. I need at least 70Hz for CRT but LCD is just fine at 60Hz.

Eye strain is caused also by other factors not only by flicker. Because You are looking at the same distance all the time eyes are remain...
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Disagree, 120hz monitors will make your LCD "feel" like a crt because everything move more fluidy.......... mouse, graphics in some games, etc. Will help kill some of the lag/ghosting/.... don't know the right terminology, but 60hz monitors seem to not display the graphics quick enough and cause some kind of fuzziness..??? because the 60rate can't give it to you fast enough.............Anybody know WTF I'm talking about that could explain it better...???? PLEASE! You gotta make your video card do it though ( 120Hz refresh rate )
 
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Ghosting is caused by response time, if its slow like 8ms or more then you get it, but anything below 8ms usually doesn't have it. And on an LCD screen i'd really like to see you notice a difference between 60 and 120hz refresh rates...and the lag you are talking about is just a low fps.
 
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+1 60Hz for LCD is fine becasue it is always lit, only changes pixel color when refresh, it does not turn it off. On crt's there is one beam that scans the screen and lits pixels one by one, by the time it returns to the same pixel it has faded to dark. Check the photos taken of crt's You will see black lines on them where the pixels has faded out. On LCD photos You will see full screen because it is always lit and just changes pixel color /brightness when refreshed. I can see CRT's flicker at 60Hz but most of the people cannot see it. I need at least 70Hz for CRT but LCD is just fine at 60Hz.

Eye strain is caused also by other factors not only by flicker. Because You are looking at the same distance all the time eyes are remain focused at the same distance and does not get exercise.

Other one is That if You are concentrating hard on what is going on screen You blink less frequent. Blinking cleans eye surface, applies moisture and makes eye to refocus giving it some exercise.

Or maybe You are just sitting too close to the screen.

Take frequent barkes, give eyes some workut looking at objects at different distances, sit further from screen.
 
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A small thing to add, if you have a TFT screen, make sure you are connected via a digital source (ie DVI or HDMI) - I find that when you have an analogue signal you still get some sort of refresh shimmer that does give me eye strain, but it's all fixed with a true digital source signal.
 
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I've had eye strain problems for years with computer monitors. It is not an issue of focusing too close. I don't know exactly what the problem is. I do know that if you monitor can't display a certain color it will quickly flash between two similar colors to give your brain the illusion that you're seeing the correct color. This could be the problem. Also the type of backlight could be the problem. My eyes seem equally bothered by both fluorescent or led backlighting.

Actually even if I look super close to my monitor, just a few inches away at a white area there is a sort of buzzing going on. My eyes are bothered much more by lots of white space on the monitor which is how most websites are designed. On my PC I went into preferences and changed all my white backgrounds to gray. This has helped a bit. My eyes down burn as much. I have a feeling a higher refresh rate will actually help.
 
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^No...higher refresh rate only helps on crt monitors, you need to understand how the different monitors work. Refresh rate has nothing to do with it. In a crt screen, there is an electron beam projector that shoots electrons at a phosphorus material with color on the actual screen. The electron beam can only do a certain if not 1 pixel at a time. Therefore to display an entire screen, the tiny beam projector must rotate and turn to get the beam aimed exactly at the amount of pixels the TV is, so lets say the TV shows 1080p. This means that the crt monitor has 1920x1080=approximatly 2,000,000 pixels (if i did my math correctly). It needs to send a certain beam at a certain pixel 2 million times in a fraction of a second to refresh the screen. Now the flickering part comes in when, the beam projector has passed the pixel and goes to new ones, the ones it passed already turn off and must wait for the next round of electron beams to come along witht the appropriate command and thats why the screen flickers many times a second. The faster the beam projector is, the less flickering cause it canr refresh is many more times. Thats why CRT monitors can cause eye strain and brain aches. LCD's do not have this problem, the technology is much different, in an LCD, it has a backlight which is always on, it never flickers, the only thing that changes is the liquid crystals which shift colors. Thats why LCD's dont cause eye strain or seizures since there is no flashing. The refresh rate really doesn't matter. You wont notice, rather the response time is what matters because thats how fast the crystals can change color but either way none of those should be causing any kind of eye or brain strain. :)
 
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I understand the differences between monitors and I realize that on paper it may seem that there should be no eye strain with an LCD monitor but for some people, like me, there is. This is no doubt not an issue for you. I wish it weren't for me either. I will continue to look for a solution. Ironically a CRT monitor is easier on my eyes.
 
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I was just asked this question by my brother today. His wife gets migraines from fluorescent lighting, and from working at the computer for extended time periods. I was wondering if her head aches from working at their LCD was because it also has a fluorescent back light (As do just about all computer monitors and most laptops).

I was going to try and find an LED back lit monitor, or a 120hz to see if that would help. Anybody know if there are any LED back lit computer monitors yet?
 
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Yeah there are many LCD backlit monitors coming out now on laptops. Let us know how it goes. My wife has a deal mini 10v that is LED backlit and that irritates my eyes also.

Turning the brightness down seems to be the only thing so far that really makes a difference for me.
 
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LCD monitors refresh by the line, this is why they cause some strain to users at 60hz.

Example here:

http://www.youtube.com/watch?v=lRidfW_l4vs

120 hz certainly refreshes faster and feels a LOT smoother. Though even 72-75 hz is enough to prevent the strain of 60hz. Don't buy in to the "the human eye can't see past 30, 60, 75, etc hertz" it is blasphemy. These rumors spread from the fact that the BRAIN begins to comprehend motion instead of still pictures at somewhere around 30 frames per second. Numbers like 60, 72, and 75 come from the most current LCD refresh rates. The human eye sees constant, it doesn't refresh. Because of this, if you put a 60hz monitor next to a 120hz monitor with a 120FPS source, you will definitely see a smoother picture on the 120hz monitor.

Your real problem will be obtaining a 120hz source. 😉
 
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I am also looking to buy a new monitor as my old Sony 24" Widescreen CRT is starting to go slowly. I got my CRT monitor when LCDs were the big thing because of the eyestrain problem with LCD monitors. Trust me, every LCD I have ever seen cannot even compare to the smoothness of my CRT at 120Hz refresh rate. I know everyone says that refresh rate is different on LCD, etc, etc, but after doing some research on the new Samsung 120Hz LCD 3D gaming monitor, I'm convinced that this will probably be my next monitor within the next month or two and it will hopefully be as smooth as my 120Hz CRT.

Here is a link to a review that distinguishes the differences between a standard 60Hz LCD and the Samsung 120Hz LCD:

http://www.xbitlabs.com/articles/monitors/display/samsung-sm2233rz_10.html

As you can see in the reviewers illustration, the white blocks on a 120hz lcd are half the size of a 60hz lcd, which would definitely make the picture smoother and less irritable to the eyes.
 
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Not true at all. LCDs refresh the entire screen at once. CRT monitors are the ones that refresh on a line-by-line basis, and that slow motion video you linked to is a CRT. That was why CRT monitors caused eye strain and flickering at 60Hz, and also why LCDs do not have such a problem.
 
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Actually, certain LCD monitors do in fact flicker.

TN panel are based upon 6-bit color technology. Basically that means They can only produce 64 shades of Red, Green, Blue which results in a total of 256k possible colors. *VA and IPS panel use 8-bit color technology which means 256 shades of Red, Green, Blue which results in a total of 16.7m possible colors.

TN panels uses temporal dithering (spatial dithering was used in the past) to display colors outside the 256k color range. The pixels basically flashes very quickly between two colors to create a 3rd color.

For example, suppose purple is not one of the 256k a TN panel can display. What the panel will do is flash very quickly between red and blue so that your brain thinks it is seeing solid purple.
 
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maybe certain ones, but all normal LCD's refresh color at once....remember LCD's have a backlight which is always on...just the pixel's color change when needed, LCD's cause absolutly no eye strain from refreshing, maybe your eye strain is from some kind of brightness, contrast, color...etc change.

cr3flo:
Trust me, every LCD I have ever seen cannot even compare to the smoothness of my CRT at 120Hz refresh rate.
Click to expand...

^Maybe you should start looking at real LCD's then, your eye won't tell a difference, what are you saying?...that LCD's are choppy and aren't smooth?, well in that case dozens if not hundreds of million of people would have to disagree.
 
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All modern TN panels flash between two colors when it attempts to display a color outside of thier 256k color palet, except those using the older spatial dithering technolgy. That represents a signicant number of LCD monitors since *PV and IPS monitors are basically priced at $500+ (with a few exceptions).
 
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At last: someone else out there who is adversely affected by modern LCD displays. Some data points:

1) CRTs below 75Hz give me migraines
2) I can see the difference between a CRT at 75Hz and 85Hz
3) LCD laptops from 1995 to around 2003 were fine - heavy ghosting with movement and you couldn't watch a DVD on them, but no problem for me to look.
4) circa 2003 laptops came out that you could watch a DVD on - except these now cause me migraines.
5) I am using a 4 year old last of the old stock HP NC4200 which still has a usable for me screen.

So it seems like there is some persistence or flicker effect. But most vendors parrot the line about LCDs don't flicker so go away :-(

So - anyone else out there who is sensitive to LCDs had a chance to try a 120Hz monitor ? I'm even thinking of buying one and passing to the kids if I can't use it.

Can anyone confirm they display normal display material (eg, desktop, everything else on the screen) at 120Hz, not just a custom prepared game ?

Or can anyone point me to the *PV or IPS monitors mentioned ? I may try them.

thanks, Keith
 
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