i share moto G symptoms with two others, one opposite side of globe, who describe the same with moto g4 plus: we get a dull throb at the back of the eyes, as if looking at something that's too close to face, similar to the 3D action movie effect for some of us. sensitive, i always have brightness on lowest setting and i've tried the filters that adjust for dawn/dusk orange/blue tint. i.e. twilight and easyeyes, they dont help with this. i also tried holding phone far away from my face and angling the light away, but none of it seems to matter. it now bothers me with 5 second glimpses every few minutes. at night, its impossible. its not the brightness!
i also have 'focus lock' with no eyepain that lasts 10-30min after looking at phone for 5-10min at wrists length (and it seems to get longer each time). so i get either focus lock no pain, or feel eye strain then brain pain, or i have a decent day if i keep exposure short/sweet.
this phone is different from other phone/tablets i've had. and it is an LCD not OLED and some group tested its flicker rate but found nothing odd about it. it doesnt use PMW if i recall.
the eye strain is over the top bad news! i popped a blood vessel in my eye in my first 10 days of using the moto g plus exactly as i did my nexus 5. it feels like how 3D action movies try to penetrate into your neo cortex to split your mind in half, causing some of us to feel fragmented, trapped in a fog, cerebrally violated, 3D headache etc.
if i look at the screen longer than 3min at a time, or in a parked car - specially if after sunset without a backlight of some kind, its as if i go partially blind, get visual auras, double vision aka can't see well enough to read anything near us or far aka can't drive or read a menu, i see trace artifacts too across all i look at. its lock focus and that alone can last 30-90 minutes, the last time lasted longer, maybe due to higher caffeine/tea intake that day.
brain/eyes demand i get any other phone. apparently, i just learned it could most likely the GRAPHICS DRIVER. something is obviously different about the moto G models - whatever it is, its not worth the savings.
will buy next phone from costco - Costco's return policy for cellular phones is 90 days from date of original purchase. that matters as 2 weeks isn't enough when busy adapting to a new device.
just joined a group ledstrain.org who are exploring the phenomena across all screens/devices, exploring multiple sources, apparently the graphics driver can be the thing to look at.