Thank you for your reply.
Distance is an important factor.
I agree that EMF may be a cause, but I don't think it's the cause of your symptoms.
Some people feel fatigue or nausea when accompanying patients to CT or MRI scans.
However, it is rare for EMF to be the cause in household devices, and it is often limited to certain models.
Also, if it is EMF, the symptoms will appear if you are near the device, even if you don't look at the laptop or phone screen.
If the symptoms do not appear if you don't look at the screen, then perhaps there is a factor other than EMF that is the problem?
I think the most likely cause is light stimulation.
This stimulation also has multiple elements, mainly the physical effects of light and the effects of image recognition.
If it is light, the strength of the symptoms depends on the amount of light and the distance.
In particular, display panels have built-in polarizing plates to achieve beautiful displays and high brightness, so although it is not as strong as a magnifying glass, it still focuses the light, and it has a strong effect at close ranges.
I think you are already taking measures, but the main thing is to rest your eyes and brain, maintain a viewing distance, and reduce the amount of light.
Although they are expensive because they are not widely used, diffuse light display devices such as reflective LCD displays and e-ink devices are extremely effective for light symptoms.
However, please note that they are less effective in resolving the image recognition problems listed below.
The image recognition problems are caused by the pseudo display technology that has been discussed in this forum.
Pseudo 3D displays and pseudo color displays give people a sense of discomfort when it comes to recognition.
A characteristic of this is that the symptoms are limited to specific models or operating systems that have the technology installed.