I use Macbook Pro Retina, late 2013 with iris pro. I saw the 2015 Macbook Pro Retina with AMD chip, wow it's definitely smoother and warmer-color. So I'm wondering if it's the graphics chip's problem causing eye strain.
So the problem might be at Temporal Dithering on Intel Graphics Chip. If someone could disable Temporal Dithering on OS X, it would be solved.
If anybody has a result and solution concerning eye strain, please tell me or email vinkenbog@gmail.com A lot of Thanks.