Lauda89 I am sure that using MBA15 without dummy still has dithering issue and much worse for my eyes. By the way, I’ve also noticed that i can’t use new versions of Safari because fonts looks blurry for my eyes (feeling that I can’t focus on text and need to refocus all the time). I played with some Safari experimental features and found some options that makes text better for my eyes (disable: GPU Process Canvas Rendering, WebGL 2.0 and Next-generation inline layout integration IFC) but still doesn’t work for me. I just decided to use Firefox that has no such issues at all. For my taste Firefox renders text differently and I don’t need to make an effort when I read. Anyway as a long-term windows user, I much prefer text rendering of Windows with it’s supbixel rendering, but Macbooks are just better laptops nowdays so you can’t ignore them. That’s why I gave one more shot for MBA after my MBP 14.
You never know that can trigger you, I also noticed if I activate high-self or low-shelf filters in audio equalizer via any app (they all use AULab options) also cause blurry text and fatigue. I also had bad experience with Linear mouse app that caused dizziness for me when I activated Disable cursor acceleration option. So sensitive people should be very careful with every app installed and settings they change.
So my conclusion that every person is different and you can have different issues that can cause your eyes to strain.
But I am convinced, that PWM and dithering are still the problem for many people nowdays, in my opinion there are lots of people who has display eyestrain and headaches but they don’t understand, that the reason of it is just their displays or led bulb. The flickering problem is much more than it is customary to think.