Consider this Bill’s post, if you like. Hey, I’m getting more non-spam comments than ever, so why not?
The image below is in some sense another test of visual differentiation–but this time, color differentiation isn’t involved. In fact, if you see colors other than white/off-white/gray in the image, that’s a sign your display could use adjustment.
Which might also make this image a good tool for display adjustment. To wit: How many different shades (or colors) do you see? I’ll provide the answer tomorrow or Monday–and this time I did check the JPEG after saving it, to be sure colors hadn’t somehow been averaged. (Admittedly, my sloppiness in selecting rectangles makes this easy–but still, I think, a useful tool for display adjustment.)