It’s astonishing how long this thread has been going. Seriously, if there are that many of you having problems you’d be better off leaving feedback with Apple rather than posting on here. If all of you do it there might even be an impact. Then again, it is also possible the majority of you are experiencing a psychosomatic effect. You’re worried about experiencing discomfort and so you do. The brain is an extremely potent organ. Personally been using my iPhone X for months now. Used an OLED Galaxy S8 before that and my eyes are fine. It is a sad thing it causes problems for some of you but I would urge you, if you experience even the SLIGHTEST discomfort stop using and maybe consult a GP.