You're probably pretty familiar with how things appear when you intentionally cross your eyes. When you intentionally focus farther away the appearance of close

You're probably pretty familiar with how things appear when you intentionally cross your eyes. When you intentionally focus farther away the appearance of close items is "different"... sort of like cross eyed focus but not really. Normally this is a strong signal to your vision system to change to a closer focus and this is pretty close to an autonomous response... but with practice and control you can control it. It might help to practice explicitly changing your focus from far to close and back to far (the back to far part is what you should pay attention to and practice). Do this practice with your monitor's edge (or the text at the very top of the monitor) and the paper. Get used to how the monitor looks when you're focused well behind it (your brain/eyes "naturally" want to shift to a close focus... this is likely a survivability trait... things close to your head are important/possibly dangerous... so overriding this takes careful practice/effort/concentration). Try positioning the image at the top of your monitor (if you have a narrow bezel) and make sure the image is only about two thirds or one half visible (i.e. scrolled up a bit). Behind your monitor, a foot or two away, have something easy to look at (eg. blank piece of white paper). Pay attention to your peripheral vision... but don't change where you're looking... just be aware of what's in your peripheral vision, especially the weird color pattern. It should appear "weird" because it doesn't match your memory of the actual pattern... if you know what I mean. Still focusing on the paper, and paying attention to your peripheral vision, move your head up/down a little bit, try not to move your eyes... i.e. where you're focused should move up/down the same amount. You should notice the weirdness (in your peripheral vision) of the image increase/change. Now... if the paper is far enough behind your monitor... when you move your head down farther you should start to see "something". By focusing farther away the "something" should become much clearer. Gradual move your attention to the "something" (keep moving your head) and your focus should naturally move out and the items become clear (especially if you're moving your head... the background will move behind the items in the foreground). Note for the image from the article the items are just a few narrow triangles, some close, some farther away, some overlapped. Also... make sure your eyes are level with the image. Rotate your head a few degrees (10... maybe 15 or 20) and the image cannot be seen. The first time you see one of these images you might be disappointed. They are just 3d shapes wrapped in a strange color pattern (the same pattern in the background and on all objects).