Mrak0020 This is also an interesting theory. I suspect that the new lighting breaks vergence even in healthy people, it just takes longer time for them. My proof of this is that more people that I personally know now start to complain about feeling like starting to see double and unable to hold single point with both eyes when they spend too much time working on new displays.
What you describe still sounds to me like BVD (convergence excess), maybe the brock string is not proper tool to diagnose your specific case. Maybe you are able to compensate the issue when using brock string.
The bottom line then would be - new display rendering and LEDs break eye vergence. When you have BVD, it happens a lot faster, as your eye vergence is already impaired.