bkdo The only slight lead I have right now is that I was talking to someone who dug into the iOS update files and told me "The iOS 14.7/14.8 update included a fix for a vulnerability on the CoreGraphics library. While doing that, they updated their JBIG2 code. which is responsible for image compression focused on halftones. I've found a few papers describing how halftones can be perceived as flickering if done wrong."

I don't believe JBIG2 is used anywhere outside of file formats, and thus wouldn't impact display quality, so any change that may cause eyestrain is merely a coincidence that occurred around the same time.

Doesn't exactly help, just stating what I do know.

  • bkdo replied to this.
    4 days later

    ryans

    ryans Do these flicker if you take a slow motion video? If so that could be making your situation much worse. A couple of minutes under these and my eyes are burnt out.

    They do. It's awful, and it seems like every store and building out there uses these horrible flickering lights. 

    ryans I haven't tried it, but Dr. Barry Tannen writes about success with a tint called Omega here and fluorescent lights.

    Thanks for the recommendation, I went ahead and ordered the Omega tinted clip-ons. I'll report back how they work.

    ryans Some neurologists recommend these supplements for migraines.

    I've been taking Magnesium, no luck yet though. Has anyone seen benefits with the supplements?

    karut

    Yeah, I have pretty severe misalignments. I recently had an extensive exam with a Debby Feinberg trained BVD specialist and got new prism lenses, but I never really noticed any solid improvements with them. Also, they just seem to hurt my eyes now. Going back soon to be re-examined, hopefully with better results.

    ensete

    I'm not 100% sure, but I know that PWM flicker + flickering lights destroy my eyes, so it's at least a part of the problem. I don't know for sure why non-PWM screens like the iPhone 11 or MacBook Air hurt so much though.

    Deornoth

    That's actually how I discovered my BVD problem - I patched my right eye and noticed improvements in flicker tolerance. It didn't solve the problem by any means though, so it's not sustainable for me unfortunately. 

    Which eye care monitor in specific has worked for you? And the frustrating thing is that even if I find a truly flicker free monitor, it seems that the device I plug in still has its own flicker (My MacBook Air, for example).

    logixoul

    Are you able to use macOS or windows on the Onyx Boox Mira?

    Allekss

    It seems that way. But I've also had devices that worked fine suddenly become unusable with software updates, so that's also a component, unfortunately.

    JTL

    Weird, I guess it must have been a coincidence. I'll reach out and see if he's found anything else related to iOS.

      bkdo They do. It's awful, and it seems like every store and building out there uses these horrible flickering lights.

      The Waveform lights have been confirmed by members here to be flicker free. I never tried them. Sitting under flickering lights all day has got to make computer tolerance worse.

      • jen replied to this.

        bkdo Are you able to use macOS or windows on the Onyx Boox Mira?

        Yes, it's just a monitor that you connect to your computer. I run Windows 10.

        I should say that I do already get some eyestrain from the Mira, but it's still much less that with other screens.

        11 days later

        ryans I haven't tried it, but Dr. Barry Tannen writes about success with a tint called Omega here and fluorescent lights.

        That is a very similar video to this one Light & Sound Sensitivity | Post-Concussion Syndrome Series

        I have not tried Omega (blue) tint, I did try the glasses (green) from my link tho, but did not help

        ….I guess one test to try out based on these videos is to block the side vision.

        Just realized the video is from chiropractor and not optometrist and he knows the trick with monitor flicker (bump brightness to max to increase flicker, add overlay to block the brightness) 🙂

        5 months later

        bkdo

        Any updates? Did you do another examination with your BVD specialist?

        I’m on a small team working on a project to make eye strain free computer tablets and curious to hear more stories and suggestions for what could help.

        We also have eye strain free computer tablets for demo and beta testing. It’s reflective LCD display, it’s fast but also very easy on the eyes.

        Feel free to drop me a line at [tiffany@jangleinc.com](mailto:tiffany@jangleinc.com)

        I have severe computer vision syndrome, very debilitating, and still coping. What has helped my eyes so far:
        1. sun light, outdoorsy activities 2. shield my eyes from LED screens with reflective display screens whenever possible 3. adding prisms in my glasses.

        I am reading your story, and I think our conditions are probably a bit different than mine, but your experiences help me understand mine a bit more. Perhaps the flickering of most screens must have been the culprit of how I got here.

        • AGI replied to this.
        • AGI likes this.

          bkdo Blue tint and FL-41 didn't help. Avulux are probably the only glasses I would buy out of what I tested, but more to mitigate very bright overhead lighting than device-induced eyestrain.

          I haven't checked CBD oil (yet). Maybe you can give it a go if it's available in your country.

          squidward_eyes_93 3. adding prisms in my glasses.

          What kind of prisms and for what condition, if you don't mind me asking? Do you use prismatic lenses all the time, including for reading on paper?

          Will definitely drop line about the display thing! Thanks!

            AGI

            Hello! 🙂 I use prism for my convergence insufficiency which most definitely contributed to my eye strain; though I don't think it's the only reason. I suspect that the LED light itself is also messing up some parts of my eyes, causing nausea. I also have an autoimmune problem that may have make my eye muscles more prone to fatigue and dry eyes probably. I use prisms for reading and paper as well, because I only use one pair of glasses. I'm not familiar with the benefits of having multiple pairs of glasses, but perhaps that is also another strategy. My eyes already have a hard time adapting to new prescriptions, so i am guessing sticking to one pair of glasses is probably more right for me. I am noticed lots of improvement with my eyes recently after switching almost completely to reflective screens. I suspect it's because the reflective screens shield my eyes from harmful LED rays, finally giving them some time to bounce back. (I suspect this is why prism glasses didn't help me because my eye conditions were severe initially, so I couldn't feel the improvement from prism alone, but as my eyes improve through other means, the prism glasses later did seem to help, because I was less sick)I'm not cured yet but much better. Still have a long way to go, especially because my eyes can change so much in a short spam of time, so I need to keep checking my prescriptions otherwise the prism glasses actually make me feel dizzy because they may not be the right fit as my eyes change. 🙂 thank you so much for your interest. And thank you so much for sharing your story. Vision therapy is also on the horizon hopefully.

            • AGI replied to this.
            • AGI likes this.

              squidward_eyes_93 You should definitely give vision therapy a go. You may get rid of the prisms. See an orthoptist or a behavioral optometrist 🙂 Finding a fix for your eyestrain may not be straightforward, though. As you said, heterophoria may not be the only cause of our problems.

                AGI ok! thank you so much! 🙂 ya I think I need someone to give me a little gentle push and encouragement to sign up for vision therapy, and feel optimistic about it. I definitely feel so much more energized to take on this challenge...In fact I might call the office today lol ya definitely not straightforward…I used to cry about it, but lately things are on an upward trend; though with setbacks as well. glad I could share this with someone who understands. means a world to me.

                • AGI replied to this.
                • AGI likes this.

                  squidward_eyes_93 Vision therapy requires only a few minutes per day. I do it a few minutes every day multiple times per day. It helps releasing some of the strain. Worst case scenario it won't (completely) fix your problems, but will make your eye muscles more balanced.

                  squidward_eyes_93 I used to cry about it

                  I understand you. Best to fight back and stay positive. Getting depressed does not help.

                    AGI

                    What kind of exercises were/are you doing? Are there any materials online?

                    • AGI replied to this.

                      karut Please see here for example. If you are not familiar with vision therapy and do not know what condition you have, you need to get advice from a professional, though. My exercises may not be adequate for your condition.

                        a month later
                        14 days later

                        AGI Thank you so much AGI! I think you helped me try again. I have been falling off of my at home vision therapy routine lately lol

                        AGI I have vision therapy exercises where I make myself go crosseyed until two images become three. Is that enough?

                        dev