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  • Jessiah1 Level 1 Level 1 (0 points)

    ElleAle, you have yet another specific type of issue, one we have not covered very much here because I believe people with EMF issues are even less likely to use any computing device than people with flicker and spectrum sensitivity. It sounds like you have spectrum and EMF, I believe it is common for folks with EMF sensitivity to have sensitivity to monitors with flicker or bright blue/white spectrums. You may find this PHD's website very helpful: http://www.conradbiologic.com/articles/EMFmisconceptions.html

     

    Have you tried eliminating all wireless and EMF creating devices from your home to see if you are symptom free without EMF? Just curious how you know your primary issue is EMF? Will you not have issues with wireless regardless of the type?

     

    Jesse

  • Jessiah1 Level 1 Level 1 (0 points)

    I have been meaning to put this out there after speaking with a PHD about light filtration. The summary is this:

     

    There are yellow filters that can block 100% of blue light however it depends on the type of yellow and the density.

     

    Interestingly enough Polarized gray glasses block approx. 85% of blue light, Brown Polarized glasses can block 92-93% of blue light while plain gray lenses can block approx. 80%.

     

    The real concern with wearing any type of tinted lense that blocks the entire spectrum of blue light is that there is GOOD blue light our body needs to set our circadian rhythms. There are a lot of side effects when you mess around with good blue light, for example: Mood, sleep, immune system function and so on. Potentially you could execrate your headache/eyestrain situation if these thing's are effected so wearing 100% blue blocking lens's all day is a bad idea. There is actually a sickness called Non-24 for people who have severe issues with blue light exposure causing circadian rhythm distortion.

     

    So you could test with yellow lens's if spectrum is all or part of the problem however it does not sound recommendable to wear them at all times. Unfortunately we will have to wait for manufactures to correct the flicker issue because spectacles are unlikely to fix that problem. Spectrum can make flicker worse through an intensified effect essentially by being bright/blue in a wavelength our eyes are not conditioned/ or evolved to tolerate while viewing so directly, like a monitor. LED lighting is so reactive to any distortion in power, wether programmed (Hz or PWM) or through AC/DC power, I seriously have to question if an LED light could ever be flicker free?

     

    Hope this is helpful, have a great weekend all.

     

    Jesse

  • ElleAle Level 1 Level 1 (0 points)

    "Have you tried eliminating all wireless and EMF creating devices from your home to see if you are symptom free without EMF? Just curious how you know your primary issue is EMF? Will you not have issues with wireless regardless of the type?"

     

    Hi Jesse,

     

    never tried to take my iPad to a forest or something and see if that changes the effect of the screen on the eyes...maybe this weekend..

     

    my EMF + apple screens sensitivity comes down to the following:

     

    I can read off an iPad Retina with WiFi turned OFF for an hour or two without being totally tortured, although it does cause eye strain and if I keep doing it every day or several times a day I will have severe eye strain.  Somewhat similar with MacBook Pro and MacBook Air. I haven't timed or measured exactly.

     

    However, when I turn the WiFi  ON- I can FEEL the EMF hitting my body as clear as some people might experience a physical touch. It makes me  nauseous and my eyestrain increases exponentially. Sometimes I have to stop after 20 min.  The same thing happens if I try to use 3G or 4G cell phones.  I have a 6 year old pre-3G blackberry and anything newer then that has been a torture.


    Gotta add, I am somewhat attuned to subtle energies, i.e. I can do hands on healing, feel earth energy, vortecies and such. 

     

    the 3G, 4G phones and for some reason Apple WiFi is really discombobulating to my body. IF you care to know, in my experience they interfere with natural electro-magnetic fields of the heart.  But WiFi on my Lenovo T61 is fine. I tried a T530 with, I believe Intel Centrino Advance WiFi, six months ago it was fine too.

     

    However, now the Lenovo offeres Intel double band AC wifi and I am worried it will be along the Apple WiFi lines...  I don't understand the differences between the these two:

    Intel Dual Band Wireless 7260AC with Bluetooth 4.0

     

     

    Any insight is appreciated!

    Elle

  • Kxtr73 Level 1 Level 1 (0 points)

    In my personal experience something has been done to newer plasma monitors that has made them much worse for me to view than my 7 year old Pioneer which is the only monitor I have left I can use comfortably.

     

    Core of technology in plasma screens in the same in all models. Every single pixel is made of three gas-filled chambers (RGB) which produce final colour of pixel. Dimming of every pixel is made only by PWM of every RGB chamber. So every pixel is always flickering. Becouse that visible flicker plasma is generally not recommended as using as monitor. The difference is that latest screens has much more enhanced brightness despite lower energy consumption. I would also like to point out that the spectrum of each model may vary, so with the same brightness one could be tolerable to users eyes and another not.

     

     

     

    I am the person which could only use CRT techology on the long run. But every CRT is different too. On my left side is Dell P1230 22' (20' real size) with Mitsubishi Diamondtron (aperture grill techology) and on my right side is 19' Gateway EV910 (18' real) with shadow mask screen. I have used Gateway from many years without any discomfort, but Dell is giving me a little disscomfort after long use. In eyes corners I see white secretion and my right eye become litlle red.

     

     

    What is the difference between them ? Dell has more vibrant colours and his white is very strong. (I play games and watch films on it)

    Gateway white is more greyish. (very good to work). So even in the same very good for some users techology there are some units more comfortable then others.

  • Jessiah1 Level 1 Level 1 (0 points)

    There is certainly a trend to go brighter and more vibrant with all display tech. and it is almost like a race to see who can create the brightest most colorful screen. Obviously for some of us that just isn't good.

     

    I would imagine if all Plasma's have PWM each would be different as well, it really is a difficult situation to find any modern day monitors that are tolerable.

     

    One option I keep forgetting about is DLP projectors, has anyone used one of these for computer use? My local movie theater uses this technology and I do not seem to be bothered by it. It is either that or the distance from the screen is helping as well. Unfortunately a DLP projector is a really expensive option for a computer monitor....

     

    Jesse

  • Kxtr73 Level 1 Level 1 (0 points)

    I don't recomend using DLP projectors to You becouse it's "colour PWM" even worse then in monitors. In camera You will see very fast moving stripes of RGB colours. Even the moders fastest one chip DLP is not good. Only 3 x DLP is ok, but expensive.

     

    DLP is using or bulb + fast moving colour wheel or 3 fast flashing RGB LED + both are using (DLP chip which flashes mirrror at every pixel constantly). To me eye strain and rainbow effect is terryfic.

     

    3xLCD projector are much better for eyes becouse steady picture and no "rainbow effect"

     

    Projector are not good to everyday work, becouse their very big total light output. Watching movies, pictures etc is ok but only in limited time too. I have tested 2 of them. One Viewsonic Pled-w500 with 500 lumens. DLP with 3xLED. Sold, becouse tremendous eye strain. Now I have Sony VPL-DV120 with 3xLCD technology and 2600/1900/1500 lumens. Both have 1280x800 which is not so worse when watching from 4 meters at 130' screen then 1920x1080. They are rather cheap. Used (but like new) Viewsonic costed me 350 USD. New Sony in Poland: 600 USD which is very good projector at that price level.

     

    So now I have very good shadow mask CRT to work, second bigger and brighter with magnifing fresnel lens before (it creates bigger screen with some 3D pseudo effect) to gaming and watching TV + 3xLCD projector to watching movies. And I am quite happy.

  • FloWavE Level 1 Level 1 (0 points)

    I have posted here that the only Mac that was comfortable for my eyes was 2013 13" macbook Air.

     

    I've tried 2011 11" macbook air. and couldn't stand more than 8 minutes.

     

     

    Now i want to add another one to my list.

     

    I have tried 2013 27" imac, 2013 13" retina macbook pro and returned it.

     

    I now got 15" retina macbook pro. This screen does not seem to give me strain on my eyes.

     

     

    Conclusion:

    2013 13" Macbook Air

    2013 15" Macbook Pro with discreet display

    are the only Mac I can use without eyestrain so far.

  • GKphone Level 1 Level 1 (0 points)

    For anyone who wants to find the right Apple Mac screen that does not flicker, good Luck! The early Mac Books Pro's, had some screens made by two different manufactures.

     

    Go into Terminal on your Mac. If the code

     

    starts with "LP" you have an LG screen

    if they start with "LSN" you have a samsung screen.

     

    LG seems to be the problem? Samsung was so much better. Well for me anyway.  Cant use modern macs and old macs......only a 2008 so far!

     

     

     

    Try filming the screens on a slow shutter speed and watch the flicker, they all move at different speeds.

     

    Some early ones don't really show up! : )  ( Samsung screen )

     

    Ref below.

     

    I look forward to Apple admitting the problem and fixing it.....Flicker free please.

     

     

     

    http://www.eizo.com/global/library/basics/eyestrain/

     

    http://www.benq.com/microsite/eye-care-monitors/mff.html

  • tomas_de Level 1 Level 1 (0 points)

    Hi all,

    I just wanted to add to the forum with my experience which suggests that not all LED LCD display are bad. I happen to have owned and used Dell M1530 with LED LCD monitor for over 5 years without ever experiencing discomfort even after prolonged sessions. Then, I had to buy a new computer and I went for Mac pro 2013 with retina. I got all the symptoms described here in the forum - vertigo, severe eye strain, nausea etc. Interesting thing was that after installing f.lux and only using the computer at very dim settings (maybe 20%) I could work for couple of hours experiencing only mild discomfort. But the cumulative effect at the 3 or 4th day was almost unbearable, so I am now using a 7 years old dell laptop and I am having no problems at all. I really don't know what is causing the problems. The ease after installing f.lux confirms that blue light does add up to the problems. But the troubling part is that I could only use my Mac at the low level of brightness, hence, I don't know whether the flicker induced by the way how the LED are dimmed can be made responsible for my problems. 

     

    What I wanted to say is that maybe the problem lies not in the technology used (meaning LED backlith), I did not have any problem with my previous LED lcd display from dell after all.

  • SimonStokes Level 1 Level 1 (0 points)

    tomas_de wrote:

     

    Hi all,

    I happen to have owned and used Dell M1530 with LED LCD monitor for over 5 years without ever experiencing discomfort even after prolonged sessions.

    Funny, I used to have that exact laptop for years and had no problems either. After switching to a non-retina Macbook I was struck down with regular migraines and pretty severe symptoms which spoiled my life for a long time! See my earlier posts - I got Apple to switch out my LCD many times to try different models - some are better than others, some give different symptoms but all give discomfort.

     

    I decided that I wouldn't upgrade my iPhone 4 for the very reason that all screens that Apple use cause problems. However it died and I got a 5S to try out (as you can return it within 14 days). It turns out I can use this for hours with NO eyestrain whatsoever. Very strange considering the severe effects that my iPhone 4 gave me. I've had it for around 6 weeks now and no issues at all. Just for information!

     

    To use my laptop I run my Macbook into an LCD screen (Benq G2400W) using a Minidisplayport -> VGA cable which works nicely. For some reason the Minidisplayport to HDMI gives me some bother..

  • tomas_de Level 1 Level 1 (0 points)

    This is so funny. I haven't even heard about the possibility of experiencing such symptoms from just watching at the LCD monitor until I got my lovely MacBook pro retina, which now sits nicely in my desk after it gave me a 2 days long migraine-like headache  ;-) I need to be able to use my laptop as portable device Therefore, I plan to try my luck with dell xps 13 or Lenovo T440s or X1 Carbon to see whether they are able to produce usable LED lcd screen as my old Dell had. I will let you know how it went ;-) I am still using Samsung Galaxy S2 and considered to replace it since it does not work properly anymore, but now after the story with mac book, I am really afraid of buying a new phone...

  • Scott98981 Level 1 Level 1 (0 points)

    Has anyone tried using Shades, Shady, or another type of program to dim the monitor? You can keep the hardware settings for brightness all the way up and turn down the brightness using software. I'm not sure if this is using the LCD to decrease the brightness instead of PWM, etc. The downside seems to be increased battery use with the LED at full power. I've tried a couple and they might be helping, so far I'm not really sure. I'm going see if this type of software can help.

  • Exandas Level 1 Level 1 (0 points)

    Has anybody tried the Sony T2 Ultra or the Z2?

     

    Yesterday i played with T2 for 15-20 mins and it seemed friendly to the eyes, but i cant say if it will cause me eye strain in the long run. 

  • Exandas Level 1 Level 1 (0 points)

    Yesterday I tried Sony Ultra T2  for a couple of hours (i did not need more time to know). Unfortunately no luck for me with this device as well. After one hour of use i got eye strain and headache.

  • Exandas Level 1 Level 1 (0 points)

    I have a question, in the article of the link below, it says that IGZO display will be flickerless. Does this mean that any flickering or the dithering process will stop bothering some people that possibly are affected by these issues?

     

    I wonder if this is the solution for some of the people in this forum. Apple is rumored to include this tech in the upcoming Ipad Air.

     

    http://www.extremetech.com/computing/160975-apple-prepping-igzo-displays-for-nex t-gen-ipad-to-cut-power-consumption-boost-image-quality