https://www.reddit.com/r/PWM_Sensitive/comments/1p7cxkp/terrible_experience_with_oneplus_13r/
"I've been using nothing phone 1 for past 3 years. Since the battery life became terrible, upgraded to OnePlus 13R.
Soon headaches, eye strain, started. Used dark mode, eye comfort mode, changed refresh rate and possibly everything. I thought i would eventually adjust.
But soon sleep disturbances started, eventually i became nervous and anxious.
Never thought a phone could cause all these troubles.
Now back to nothing phone 1 for past 5 days, my symptoms have reduced.
If you're upgrading to newer phone with super bright AMOLED screens with LTPO, try to spend considerable time using the device, Don't blind buy online by watching all these YouTube videos.
(I'm a physician )"