Previous 1 70 71 72 73 74 Next 2,348 Replies Latest reply: Feb 9, 2016 12:36 AM by kvoth Go to original post Branched to a new discussion.
  • supersarper Level 1 (15 points)

    F.lux is great solution for me, wish they could make this for every device on earth.


  • Exandas Level 1 (0 points)

    @Eric: I also get throat issues!!! I feel like I am getting sick. My doctor told me that it seems like some kind of allergy since my throat gets a bit swollen. I get it each time a use the ipad or iphone. Really strange.

  • Eric Leung1 Level 1 (5 points)

    Wow, I am surprised to see other people having so similar symptom as I do!


    In fact, I did wonder if it was some kind of allergic response. And I did try to take anti-allergic pills when I felt discomfort with the throat after looking at the problematic LED screens. Guess what, it did appear to work for me!


    BUT!! I'm no doctor, if anyone want to try this, better seek proper medication first!


    Nevertheless, it appears it could be that some of us are allergic to the light coming out from the bright harsh blue LEDs...  ?!?!

  • Eric Leung1 Level 1 (5 points)

    Let me ammend what I just said, regarding the anti-allergic pills. It had quite an obvious effect in helping my swollen throat, but doesn't make my eyes more comfortable.


    And, I'm fairly sure that my swollen throat is linked to the bright-harsh-blue-LEDs. As it would start feeling uncomfortable not very long after looking at that kind of LEDs and gradually fades away as I look away.

  • Jessiah1 Level 1 (0 points)

    @Doves, this does help me greatly for a period of time just as you have described. It seems like there must be some sort of depth and focus issue created by LED lights that closing one eye can effect.

  • logoo88 Level 1 (0 points)

    If there are devs among us, how is the new OSX Mavericks (beta)? Does it change anything?

  • Dovez Level 1 (0 points)

    I think light comming from the screens contains too much information. Too much information overtires the body and causes symptoms. Closing one eye makes your body work twice as less hard to process it. By information I mean rapid and often not consciously visible light level changes (any form of flicker), spectrum (blue light contains more information than red or green light), light patterns (pixel grid, or black letters on  a white screen), brightness (how  much light enters the eye), not sure if polarization is in any way detected by humans. The blue part of the spectrum is one of the easiest to get rid of nearly completely for a short test period to see how strong the factor really is. Just look at the screen through a strongly colored transparent red peice of plastic.

  • AxelTerizaki Level 1 (0 points)



    It's been a while since I posted here.


    Sadly, iPhone 5 and the latest Apple screens (as well as Samsung and MSI laptops for example) cause eye strain after 5 to 10 minutes of use.


    I haven't yet found a solution, but I wanted to know if people here tested the Samsung Galaxy S4 and the HTC One and if they have the same kind of problems?


    Thanks in advance.

  • Willast Level 1 (0 points)

    I would like to see what people have figured out to overcome the issues that they have.   I am sensitive to florescent lights, flickering and LED blue spike.  Here is how I handled the new florescent lights that they put in at work.  They went to a new cool light that gave me head aches, eye fatigue and other weirdness.  Fortunately, I have a great optician and we tried a number of BPI Therauputic Tints.  I found one that worked for me really well.  It is called Euro Brown and cuts the lite down across the spectrum especially on the blue side.  I have glasses tinted at 20% and I can function normally in the office with this tint.  They also make other tints especially one called FL41 for Florescent light.  It didn't do the trick for me.  The Euro brown is the one for me.


    Now I am working on the flickering and Windows 7.  I have an XP system and a VGA monitor that I use.  I find that Windows 7 causes eye problems for me.  I have turned off ClearType and changed the Segoe fonts out and it still seems like the monitor is fickering.  It feels like Windows 7 isn't really using the higher refresh rates even when it is set to 75 or 80 Hz.  I am waiting for the new Benq 24" No PWM monitor to see if that will help.


    Any input would be appreciated.


  • babowa Level 7 (29,940 points)

    logoo88 wrote:


    If there are devs among us, how is the new OSX Mavericks (beta)? Does it change anything?


    Anyone who might know is not allowed to share his/her knowledge.

  • Dovez Level 1 (0 points)

    I have come up with something that might be of great help to someone with a pwm-free  screen who is experiencing these symptoms. This might or might not work even if my assumptions are correct. My assumption is that the biggest cause of the symptoms is pixel flicker which might be completely invisible in some cases. I saw a video showing only white pixels flickering. There are two states of pixel flicker : darker pxel, lighter pixel. So the method: Go the the settings of your graphic card and configure the contrast, brightness, red/green/blue settings so that the screen is as bright as possible while the content on the screen remains still mostly visible. The backlight intesity should be as low as possible. Why this could work? This might keep white pixels from going too far dark when flickering and the flicker would be minimized, because its depth would be lesser.


    If the graphic card has no influence over the darker states of the pixels of this flicker, then this method would not help at all and possibly would be counterproductive. If this method makes the problem even worse, then you could try the opposite: set the graphic card settings to very low and the backlight to very high (or not). This would keep the pixels from going too far white and the depth of flicker would be smaler.

  • EyeDr K Level 1 (0 points)

    Hello everyone I am an eye Dr in Australia and have been invited to do a presentation about eye strain and computer screens.  This is an extremely important topic which has very little research.  The problem is that eyestrain is multifactorial of which glare and flicker is only a few of many reasons.


    I would like to know whether anyoone has had any experience with the new Benq Flicker Free screens. These screens are LED based but unique from what I understand in the market place as far as being Flicker Free.  Any comments would be greatly appreciated.


    Dr K

  • Jessiah1 Level 1 (0 points)

    I posed this question earlier in the forum and no one seems to have tried this monitor yet? I agree that eyestrain is multifactorial and I would also add that there are many health conditions contributing to light sensitivity with different degrees of acuteness. Monitors are not the only issue here as well, there are many LED overhead lighting fixtures which cause the same symptoms, most of us here feel a large contribution could be from the PWM controller. This is an epidemic for some of us where we are loosing life functionality, I have been on disability now for 4 months due to overhead LED lighting and LED computer monitors. I have several specialists helping me including a renowned headache specialist and so far no real solutions.


    If I had the funds to purchase this monitor and trial it I would certainly do so and post my findings here and on my Website. I have a hunch however that the blue/white spectrum of the LED is a major contributor to our discomfort and removing flicker is only a start in advancing this technology correctly.

  • Gareth Jones6 Level 1 (10 points)

    I can't comment on the Benq monitors but I did buy an Acer S243HLAbmii LED monitor as I read it had very low PWM. It was still unusable unfortunately, although I am able to use it for distance viewing (i.e. downloaded TV programmes) for an hour or so.


    It's not just the LED lighting that's the problem however, as I have hooked my macbook up to an old CCFL screen and it is still problematic. Here I can use it for an hour or two if I wear sunglasses.


    The only two things that have worked for me is using old computers/laptops with Windows XP installed (and CCFL screen) and using a Kindle Paperwhite (which I would recommend for basic web browsing).


    My problem is also related to natural light - my wife currently has the blinds fully open and it is giving me eystrain just looking at this old laptop which is usually fine.


    I also had a migraine from looking at this computer in low light one evening (sun went down and couldn't be bothered to swithch the light on). I was very stressed that evening which contributed but is was definitely also from looking at the screen.

  • LinStugie Level 1 (0 points)

    My husband just purchased my mac book pro 8 months ago, the eye strain was so bad that I had to go see an opthomologist, and my eye sight was worse and I was told that there are special glasses for people that use computers, I do not use my mac book pro anymore, I use my ipad, sad huh

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