I'm just seeing this thread for the first time, and while I don't have the time to read through 63 pages of comments, I'm curious if someone familiar with this thread/issue can tell me if folks have uncovered any details as to what is causing the issue and what factors determine who it impacts?

I personally haven't experienced any eye strain issues from Dawntrail, but I'm incredibly familiar with the fact that different stimuli impact different people in different ways. I'm always curious to learn more about anything that has to do with accessibility.