Help! Each TV Irritates My Eyes -What To Do?

Buying plasma is the problem.


CRTs worked by updating the whole screen at 60Hz. This caused a visible flicker, but your brain could tune it out after a while as it was constant.

Plasmas work by flashing the pixels on and off rapidly, at varying rates, to create shades.


Due to their larger size, and because different areas of the screen are flashing on/off at different rates, I find flickering to be visibly more distracting, and cannot watch plasma displays for long before getting a headache. Because it's constantly changing, your brain can't adapt to it.



LED screens produce a completely stable image. The screen illumination (LED lights) is completely independent from drawing the picture (the LCD panel) and so there is no flickering.


Some higher-end LED sets do use what they call a "scanning backlight" (many 240Hz+ sets use this) which does introduce a flicker, but it is at a constant rate (like CRT) however it is at a much higher rate, so there should be no perceived flicker from the screen.


With my Sony screen (HX900) changing the motionflow options can enable/disable this scanning backlight. The "smooth" options keep the backlight constant, and the "clear" options use the scanning backlight.


I feel that the picture is generally better with it on (sharper motion) but if I'm tired or feel a headache coming on, I'll disable it. There is no visible difference on the screen (though I can tell it's changed if I wave my hand in front as there's a very slight strobe effect in a dark room) but it's definitely more relaxing on the eyes.



What I must stress though, is that if you get an LED screen (don't get a regular LCD, they now strobe the CCFL tubes) you must turn down the backlight to a comfortable level for the lighting in your room. Too often I walk into people's homes and they have the picture up at full brightness and they complain about getting headaches after watching their new screen for a few hours. They think the problem is the TV, and not the fact that it's blindingly bright. Just because it can put out a bright image, doesn't mean it should.



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Originally Posted by codyred /forum/post/20857918


Chronoptimist, thank you, thank you, thank you so very much! Finally a real answer to this very real problem. It's fantastic to finally find someone with a cogent answer about this eye problem. My doctors nor my internet searches have come up with any real solution. I've been on an island with this... I will probably return this plasma and go with an LED TV.

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Glad I could help.

Quote:
Originally Posted by codyred /forum/post/20857918


Now on a completely unrelated issue, is there an LED without "soap opera affect?" I went with plasma technology because of the "soap opera affect" I saw on LCD's vs the movie look of plasmas. I like my movies to look like major motion pictures and not like soap videos. Any thoughts on an LED that is natural on movies?

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That's caused by the 120Hz, 240Hz etc. motion interpolation technology.


With the Bravia I have now, I do not notice a "soap opera" effect when watching films, like there was on other screens that I have had in the past. On those sets, I had to turn the 120Hz stuff off, with this screen, I tend to leave motionflow (Sony's name for it) enabled, as motion still looks natural rather than sped-up.


I think Samsung also now have options for theirs that let you use 120Hz (for clearer motion) but let you adjust how much of a "soap opera" effect it adds. By default, they look terrible though.


Not sure about other manufacturers, haven't checked out recent models for them.

Quote:
This thread belongs somewhere else.

Interesting rumba, since oxygen is recommended and what I use regularly during a cluster headache attack as an abortive. Unfortunately, I'm sure I'll have to use it sometime during the night since I'm in the middle of these attacks these days. Breathing Oxygen beats taking medication. About the TV, I hooked up the XBR 929 this evening with great hopes but I'm experiencing some eye irritation from it too. Not as much as with the plasma I just sent back, but I hoped this time there would be no eye irritation. But as soon as I first looked at the screen I immediately felt a bit of that oddness in the eyes. I'm so frustrated.. I do have the backlight turned way down low and lowered the picture (contrast setting) as well.. Damn this, I wonder if I'm meant to have high def television at all! But I'm not giving up yet. I'll see how my eyes feel and what if anything with them improves over the next few days and weeks. By the way, I never ever watch TV in a darkened room at night. I know better. I always have a fairly bright light on near the TV. I sure don't want to think about buying someones cast off used Sony High Def CRT TV as was suggested to me.

Giacona that's plenty of distance for a 42" you should definitely have no problems. But you do. I sympathize. I don't know what I call my eye problem. It does not feel like strain but maybe it is. I know I can be looking at the blank screen before turning the tv on and as soon as so as the screen is turned on I immediately get the feeling almost like a very very slight burning irritation that is undeniable. I have had 3 plamas and now an LED, 2 Panny 50"ST30's, a Samsung 51" PND7000, and now a 55" Sony XBR929. They all make my eyes feel irritated as soon as my eyes view the screen. Now, I've got to return the Sony too!!!


I sit about 12 feet from my TV

I never watch in a darkened room/ tv even bothers my eyes in daylight

I have the contrast (picture), brightness, backlight turned way down

I went to the optometrist and got a new eyeglass prescription


1. Could it be the HDTV signal via Direct TV?

2. Could the TV be too big for my room? 12X18X8

3. Is it the HDTV technology -plasma/LCD vs CRT (CRT was never a bother to my eyes but the largest set I had was 36")

4. Am I stuck with buying a used Hi Def CRT

5. Since I bought my first HDTV in May my Cluster headaches returned so there seems to be cause and effect. I had not had them for a couple years. Now I have them every night and had to go see my neurologist for meds

Sorry to resurrect an old thread, but I think it's important for those who find this by a Google search.


I need to correct several bits of advice in this thread. For those having issues with eye strain, an LED television is NOT NECESSARILY the answer.


We bought a 55" LG LED backlit television and both my wife and I started having problems with eyesight. Buzzing eyes, fatigue, inability to focus on small text, that sort of thing. We eventually realized that the onset of these symptoms coincided with the purchase of the television a month earlier. So I did a search online, and talked with a few people about it.


As opposed to TURNING DOWN the LED backlight (suggested in this thread), you actually have to TURN UP the backlight, then turn down the brightness and adjust the contrast.


The reason? LED's simulate "dimness" by turning on and off at a certain rate. The lower the rate, the more "flickering" your brain will see. If you put the backlight at 100%, it will keep the LED's on constantly and eliminate the flickering that is most likely causing your eye issues. Then use the brightness and contrast settings to get your TV to a comfortable level for the room.


I hope this helps.


I am not allowed to post URLs in my posts yet, but if you do a Google search for "Eye strain from LED backlighting in MacBook Pro" you will find the appropriate thread that helped me discover a fix for the issue.


Personally, I'm turning in my LED (am just within the 30 day return window) and going back to LCD.