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  • luisx Level 1 (0 points)

    Agree with you spprt,


    Incredible and unaceptable what happens to IOS7 and our iPhones. We already assume our course with LED screens and our problems to look at them, which makes us search and buy very carefully any technology that is confortable for our eyes. I was very happy with my iPhone 4 for 3 years running IOS4, 5 and 6 with ZERO issues and able to spend as many hours as I wanted in front of it. That's why I bought it!


    Now after the upgrade I can not use it for longer than 1 minute without feeling very very strange. Thanks Apple. It is over between you and me. I find unaceptable that your software update applies some new techniques that spoil our phones. To make the matter worse, it is literally impossible to downgrade to any lower version. This is ridiculous! and of course zero feedback from you and no attention to any of us. Thanks again!


    From my end the only thing I could do is to definitely not buy from apple anymore and take the effort to speak out about what your products do. I'm sure that the impact of my bad feedback is insignificant to you but as a disappointed customer I have the right to not recommend your technology to anyone. This is my contribution to the cause.


    apologies for being so negative but I am very disappointed and upset. This is not acceptable and won't happen to me again. Not from you dear fruit

  • LovesDogs0415 Level 1 (0 points)

    No apology necessary. Certainly not to Apple!


    Many, if not most, of us share your experience and feelings, which were so nicely expressed.  Please cut and paste and let Apple know via  Apple apparently does not read these forums, but the feedback page is read.


    It is beyond ridiculous that loyal customers can no longer trust such a dominant provider of electronic devices.  I am beyond upset.  I feel cheated and am angry. Apple completely dismisses the fact that their products cause harm and that many of use can't use them.  That a software upgrade would drastically and negatively change the viewing experience, with no option for returning to an acceptable version is "incredible and unacceptable."


    I was able to use IOS 7.0.6, but 7.1 causes problems.   In a way, it is fascinating that the software can do that, but also, in this case, disturbing.  I am on my last Apple products, but frankly have no idea what I'll try next, given the expansive use of LED.


    Thank you so much luisx for sharing your comments here.  So very well put!

  • Exandas Level 1 (0 points)

    There are other people complaining about the new ios, besides the people in this group who are sensitive to led displays. There is even a specific post in the Apple forum (ios 7 eye strain). 

    I have rest my hopes in the Sony Z2.

  • piippo Level 1 (0 points)



    I can start intelpwmcontrol only on my laptop, how you start it at the desktop monitor?

  • Jessiah1 Level 1 (0 points)

    I feel the need to point out the obvious here about the IOS update issues.


    1: There is a reason why more people than those that are exactly like us are bothered by the updates, we who are extremely sensitive are a baseline for worst case scenario


    2: The light is the source of the problem, contrast, brightness, dithering, or any other display manipulating technology affects how sharp the issue is, when the screen becomes brighter or thing's are done to make images "POP" more then the offensiveness of the light source is thus increased. Flicker is a general term that could be used to describe so many image stability problems. When a light source can go from 100% to 0% presence in milliseconds anyone's brain is going to detect image stability issues because the light is SOOOO responsive to any imperfections in it's delivery.


    3: Science IS showing there is a harmful wavelength's of blue light present in all of our devices and over time they will impact EVERYONE negatively. There is not enough research or human example yet to cause ANY concern.



    I will try to use an analogy that I think will help everyone understand why LED has become such an issue for many of us here.


    There are three phases to everyone's sensitivity here and they can be broken down easily by the three different kinds of light used in our world. Depending on your level of sensitivity perhaps only LED bothers you or maybe you are more sensitive and fluorescent is also an issue, typically no one is bothered by incandescent but I have read of people who could perceive power delivery flickering from incandescent however I would not expect to see them using any computer monitors at all.








    Now, most people if not all are fine with incandescent because it's ability to react to power fluctuations or anything that is inconsistent with power delivery is Null, it is glowing hot fire so it takes time to cool down.


    CCFL/Fluorescent has the similar "glowing" properties however now spectrum is not as accurate because we are using a chemical reaction to create light. Gasses react faster than glowing hot metal and flicker or power disturbances are possible to detect.


    LED is capable of the highest Hz rates we have ever seen, why? Because it is an electronic light that shuts on and off whenever there is any disturbance or programmed settings causing it to either be ON or OFF. Everything about this light is magnified to a level we have never seen before and the spectrum of choice is blue (Which our eyes have the least tolerance of all wavelengths of light) because it is the only color LED they can create that lasts for a very long long time. Has anyone noticed how older green and red LED's on our devices like alarm clocks are not bothersome at all?


    Let's break it down with the analogy:


    Incandescent: Dull AXE


    CCFL/Fluorescent: Sharper AXE


    LED: Japanese SAMURAI SWORD capable of cutting through a mans neck in one fell arc.


    When adjustments are made to the sharpest sword to make it sharper it affects everyone more, that is why the new IOS is more offensive. Apple is making the screen brighter and colors "POP" more through software adjustments.


    After seeing everyone's response to my question about XP on LED monitors I would say it's a safe bet windows is doing the same thing, making their displays look as bright and beautiful as possible through software adjustments.


    Hope this is helpful, I know I no longer question why the operating platform updates are bothering people more however I realize I have not supplied any distinct facts and this is all based on my reading and comprehension of research articles in regards to light.


    I feel the only helpful thing that could come out of discussing the operating platform updates would be if someone here knows how to dissect them and find the display changes that are obviously happening so we could understand what they are changing that is making the situation worse.



  • Jessiah1 Level 1 (0 points)

    1 thing I forgot to add about the LED light source: The older Iphone 3 I had some time ago was very much less offensive compared to the newer tablets, phones and laptops. The reason is simple, they used to coat the LED light bulbs with WAY more yellow phosphor! I theorize they stopped doing this in order to save money and make the displays appear more clear and bright, unfortunately that means more blue light and a more intense effect just like any other modifications causing the display to "POP" more. Many of you have spoken of how much"yellower" your old screens were in previous gen Apple phones and laptops, you can see with your own eyes how much "Bluer" the newest displays are now. A good question I cannot answer is how much blue light yellow phosphor can filter out...


    This is an interesting paper on markets and Phosphors for anyone who cares:




  • soundstar3 Level 1 (0 points)

    Can someone post jessiah1 website link? I can't find the link. Thanks

  • Jessiah1 Level 1 (0 points)

    Apple will remove it, you will have to get creative with google Also, I have not spent much time updating it for obvious reasons however I hope to remedy that in the near future with some assistance.Here is a very interesting link about an LED light bulb using Phosphor to create white light much like what our computer monitors are doing, there is an image where one phosphor panel is removed and you can see just how blue the LED actually is. The question I cannot find an answer to is what % of that Blue light that is harmful gets filtered out? I would guess not very much based on my research and understanding of technology that filters blue light. So even though it appears to be yellow/white light, it is still blue light! Filters do not change a lights properties, they filter out wavelengths of that light..........SO ASK YOURSELF, if the only light the source is creating is of blue light spectrum how is it possible to change the color? I'll answer it for you, you cannot, you can only filter it to make it appear different.


    I have not heard from Artichoke lately, I would imagine he would have some inputs on this subject and clarity.








  • soundstar3 Level 1 (0 points)

    jessiah1, can you send me your website link or contact? I want to send you some information i have from trying +10 different screens in the last months.

  • mannion7s Level 1 (0 points)

    Hi all, been following this thread for a while now and i think my problem is similar but maybe a little different. I have had the same laptop (dell inspiron 1545, ccfl backlight) for about 4 years, for the first 1 or 2 years i could use it all day every day without any symptoms of eye strain or headaches. But in the past two years i started getting eyestrain and occasional headaches and its been getting worse, to the point where i cant really use my laptop at all without my eyes hurting. I got an iphone 4s a year ago which hasnt helped the situation, as my eyes just arent getting any rest at all. I recently tried a BenQ2710PS which has no flicker and reduced blue light mode which isnt any better (maybe i didnt give it a proper chance as my eyes were already strained when i first used it).

    I've had my eyes tested a number of times and tried all usual advice on preventing eye strain, to no avail. I have no problems at all with reading or even watching tv for as long as i want. 

    Does anyone have any suggestions to what exactly the problem is? and a possible solution?

    I'm thinking of taking an extended break and trying eye exercises but a complete break isnt really plausable atm



  • GKphone Level 1 (0 points)

    This may help understand the flicker of the screens! And why its a problem to many.




  • Jessiah1 Level 1 (0 points)

    mannion7s, what you are talking about is interesting to me because it is similar to a progression I have gone through. I was able to use CCFL screens without anti-glare glasses for years until 3.5 years ago, it was around the same time I had what I think was a concussion and started using more LED devices frequently like my iphone 3. The more LED exposure I get the worse my condition gets towards all bright lighting, it was when my company installed severely blue warehouse LED bay lighting that everything really fell apart for me. Two weeks of that on and off and I was suddenly bothered by every LED light source, something happened however I have no medical answer for it as of yet. I have slowed down the progression by avoiding LED and fluorescent lighting and wearing blue light blocking anti-glare coatings. Every once in awhile something happens and I get severe migraines from a hidden source or forced situation, I try to avoid that at all costs so my symptoms do not increase however taking long breaks has not "healed" me. I noticed a sensitivity to sunlight many years ago however it was nothing like what LED lighting causes, there is a reason why it bothers some people but I fear we will not have a definitive answer for some time.


    What you will find in this forum are suggestions for setting modifications, screen filters and other methods to reduce flicker and blue light effects on LED monitors. There are no answers on what the problem is or any definitive solutions but of course we will all keep looking for that.


    One question, what model exactly is your television that is ok for you to watch?



  • Jessiah1 Level 1 (0 points)


    Good links GKphone, they go through the basics of flicker and spectrum on LED monitors in a clear way anyone could understand. Has anyone tried using an EIZO monitor that has these blue light lowering and flicker adjustments? Interestingly enough the EIZO monitor article claims 5000K as a pleasant setting, I have researched nothing bad news about anything above 3000K for those who are sensitive....Not sure how they are getting less actual blue light out of an LED bulb that only emits blue light.....You need to read the article to understand why I quesiton this part.


    "We were able to create a comfortable viewing environment with Auto EcoView automatic brightness adjustment and Paper mode, part of Fine Contrast presets."



  • tfouto Level 1 (0 points)

    jessiah1 thanks for your posts... lots of info...


    One interesting thing. I bought a kindle paperwhite. The one with LED backlight. And i have to say, with led max brightness it's the worst offender to my eyes. Worst then any phone...


    So i guess on my case dithering is not the problem. Only backlight (blue-light)...


    Of course i will not keep it... Maybe will look into the older non-backlight version...