After gazing for a few minutes at both grids, I do see the effect but the green is much more prominent for me than the magenta (which I see, but much less prono

After gazing for a few minutes at both grids, I do see the effect but the green is much more prominent for me than the magenta (which I see, but much less pronounced) despite gazing back and forth at both for about the same time. The page would be a bit better if it incorporated some basic image controls, IMO, to allow you to rotate the image, zoom it, etc. I downloaded the image and did some of that locally and zooming in and out is pretty interesting because the effect becomes less pronounced (for me, anyway) as I zoom out away from 100%. It seems like the size of the "haze" around the bars remains constant as you zoom even as the size of the black bars changes, so as you zoom in the effect becomes less and less pronounced until eventually the black bars get so big that it seems to disappear altogether.