Mrak0020 Also I have a hypothesis that the source of light have little to do with my problem, but the qualities of light rays are the key. In LCD screen, light from a backlight goes through a lot of layers. Maybe one or couple of them are the source of my problem. But that is a hypothesis.
Definitely not my problem, but it can be yours. Have you tried using some sort of screen filter, whether plastic or glass? I´m thinking that, if your problems come from the surface by which the light goes through, the filter might "correct" this output somehow by adding a different layer. Just a wild guess.
Mrak0020 A person who has my kind of problem once saw a e-book that caused him an eyestrain. I can't check what was the exact reason, but I know for sure that he is not flicker sensitive, so that particular e-book could also be doing something to light. I doubt I will research that any time soon, but I keep this interesting fact in my memory.
So whatever kind of glare your Dasung makes, that is an interesting one.
If that person was also sensitive to sunlight, and specially sunlight glare, then it´s probably glare. Or that´s what I think
Mrak0020 Have you tried checking your convergence with the brock string? This week I had weird eyestrains once even leading to sort-of-migrainish pain behind my eyes after using my safe screen. I checked my eyes with the brock string and found out that my eyes were literally jumping all the time, and I didn't notice it without this test. Probably eye muscles and accommodation were severely overworking. It seem it was somehow triggered by light from the screen and focusing on the screen. While I am not healed yet, my condition slightly resembles yours. (I was using a bad scree
Truth is I haven´t even heard about convergency problems until I found this forum. I gotta get that checked, that´s for sure
daniels The really curious thing for me is that I am also able to watch videos indefinitely -- for hours -- on the same screen that causes me problems if I'm using it for anything else.
It´s truly annoying. I mean, at least we wan watch videos, but… it just drives me crazy
daniels In contrast to you, though, I don't get any problems after 3 or 4 hours (although I probably haven't tried watching videos or movies for that long in one go, come to think of it!), and if I have used a screen before and gotten some symptoms, I haven't noticed this affecting my ability to watch video without further problems.
Well, actually, depending on how strained I am at the beggining of the video fest (??), I might be able to watch for more than 4 hours. I did it a few times, but it´s just not something I would normally want to do. Also… I wouldn´t want to try my luck and get eyestrain. But, if I´m not strained before I start, I could probably do it. Again: I need to tune down the blue light a little bit via software.
daniels It might be worth mentioning that my symptoms seem to be different from yours: I don't get any eyestrain that I notice, rather I get brain fog, it is as if my brain turns to putty, and this negatively affects my ability to think clearly, my sense of orientation, the vivacity of my senses and consciousness, my ability to interact smoothly with other people, etc. I get "zombified."
Ok, many questions: do you experiment these problems only watching LED screens, or also from sunlight, sunglare, bulbs, etc? Does any other stimulus trigger those symptoms? Do you have other health issues? And, lastly: have you consulted a rheumatologist? I just ask because brain fog is usually related to rheumatic conditions, such as arthritis (you would already know if you have it) and fybromalgia (much more tricky to diagnose).
Mrak0020 Few things that come to mind about videos:
image changes constantly, no light that comes continuously from one point to you eyes
But it does… image changes, sure, but it comes from the same place. Even more: it would make a lot more sense that we are annoyed by quick image changes as in videos.
Mrak0020 no need to focus on small details, like letters or buttons, eyes scan all the screen
I thought the same at first… and then, no. I´m not a native english speaker (as you have probably already guessed by some mistake or another in my writing), so I always watch english language shows with subtitles on. Hence, I´m basically reading most of the time. But, if the blu light filter un-whites the subs a little bit… no problem there. And I have just came to think that if I could use a word processing software with some random video as background (which would magically not interfere with the color contrast in letters), it would be… I don´t know, an interesting experiment?
Mrak0020 I would check binocular vision with brock string before the brain for and when you have it. Especially if you have this distinction between watching videos (less need to focus) and doing everything else (more need to focus
I will, no doubt. But I raised the point to my neuro ophthalmologist recently, and he just said "you also need to focus when you´re watching a video". I wont´t discuss opthtalmology with an ophtalmologist, it makes no sense. Yet… it´s different somehow what we (I mean, all humans) do when reading vs watching videos. Although it´s also true that I´m reading subtitles the whole time, I'm also scanning the whole screen. Might be the thing the thing that gives me relief from reading… or not. I don´t think that´s it, but in the end, I can´t be sure.
Mrak0020 There's also one interesting experiment. Another person who shares my symptoms and who tried disassembling screens, tried this: he removed a top polarizer from an LCD screen, so there was no image on the screen (just like here https://www.youtube.com/watch?v=ydRZkLK7S-w&loop=0). Without this detail no matter what is in on the screen, you see no image. Everything is just pure white. He looked at the screen and realized that the pressure is still present, but it seems much easier to look at the screen. He felt that his eyes were looking to nowhere. Then he grabbed a random black thread and placed in front of the screen (on top of it? I am not sure how to say it in English). He looked at the thread, his eyes focused there and he felt the usual eyestrain!
It´s weird how it looks all the same, and yet the sources of our eyestrain can be so different. It really seems that, in your case (and his), that´s the source (or one source) of the problem. I would try adding whatever layer I can use in front of the screen. I read recently that some guy succeeded to use LCD screens by simply putting some sort of plastic sleeve over it. I bet (s)he is triggered by the same source as you are.