Hello, I have not written here for a while, but wanted to share a recent succes inspired by @mike and his approach.
Some of you know me here from before, I have written a blog about visual therapy for a diagnosed esophoria (binocular vision dysfunction) for this issue and how to approach various treatments - https://heteroforie.webnode.cz/
After years of visual exercises and therapy the issue became manageable, until after I had to switch iphone 7 I was used to, to a new iphone 15. The issue returned with a great force with headaches after few minutes on the screen, slight migraines if overdone and so on, the usual stuff everyone knows here. Something that has not happened in a long time to me.
After consluting it, I tried @mike method of covering one eye with a finger and using the phone for 1-2 hours each day (just at home, playing chess, reading…), then switching the eyes the other day, and so on. The pain was pretty much nonexistent when using only one eye, and after two weeks or more (it can however take a lot longer), my eyes and brain somehow adjusted, and I could start using the phone with both eyes. I am now adjusted to it and the issue disappeared, or went to the usual of "pain and issues come up if I overuse it for hours on end with no break".
I wanted to share this, as it could help a lot of people here. I do not know the exact reason behind it. Either the eyes are easier to train one at a time (proven approach also from my visual therapy before), or you first need to see and convince yourself that the device can also be entirely not painful, to stop your brain from triggering the pain immediately as a learned reflex of sorts.
For everyone who cannot acces proper evaluation by a trained optometrist, or get a binocular vision dysfunction diagnosed and properly treated with visual therapy, I recommend this option as a free tool to try out and see if it helps. It sure does help in my case even after years of proper and supervised visual therapy.