martin Not yet. I will check it out.
Have you tried the XS? As said above, I did not feel any strain over 20 min, surprisingly. It has an OLED screen, so I expect it to burn my eyes within seconds like the Iphone X or the last Samsung phones.
Also, what is the status of the Face ID thing? Months ago I read various forums in which they identified that app as the reason for eyestrain in people who could use any previous model, including the Iphone 8, without any issue.