![]() ![]() And if you introduce some subtle offsets into two otherwise similar objects, the mind will perceive the famous 3D effect we're here for.Ġ. The eyes are feeding it visual information as usual, but not in the usual manner. What we're doing here, is fooling the brain. It's helpful to remember that visual perception happens in the brain-not the eyes. So where does that center image come from? This is the crux of all autostereograms (stereograms that work withut aids.) It is the center object where the 3D effect takes place. When you see a non-existent object appear between the two existing ones, you have mastered the basis of the Stereo Pair. Try staring through the paper at a space a few feet behind it. You can also practice this with two dots, a couple inches apart, on a piece of paper. Try this for awhile, until you gradually see the three zeros. But now, look behind them look into the inside depths of your monitor and forget about focusing. Your primary inclination is to focus on the above two objects as is normal. Let the eyes relax, and move your head forward or away until three zeros appear clearly. What you want to do here is have your mind process these two objects until they appear as three. Let go the normal way you focus on something on a page. The only thing you'll need here is a monitor and two eyes. Congratulations, you are now viewing an autostereogram as it should be seen.īelow are practices without aids. You should now see three images: the one in the middle containing the 3-D effects. ![]() When you are sure, hold that focus and remove cardboard. Remember, you do not think you see a 3-D effect-you will know for sure. Now relax your eyes, and slowly bring things into focus pulling your head back. If alignments are good, you should see only one image. Now place other end of cardboard between your eyes. Place cardboard directly in middle of pair, as illustrated in Fig. The essential key, in fact, is to relax your eyes into viewing this way.īelow is a stereo-pair image. Unlike cross-eyed vision, there is no strain or discomfort with parallel vision. I have illustrated a cut-out for nose and glasses, but none is necessary. Instead, you are forced into parallel vision which is just what we need for Color Stereo stereograms. After that are practices for viewing without aid.īy placing a cardboard between your eyes (Fig, 2) you cannot use normal or cross-eyed vision. Be sure to view straight on as possible.įirst : let's try a visual aid. I have found that single lens glasses (as opposed to bi/tri focal, or progressive lenses) work best. If you ordinarily wear glasses to read off your monitor's screen, you will likely need them here. After all–what you are doing is overcoming a lifetime habit of viewing everything with "normal" stereo-vision: that which gives us a sense of depth in in our everyday viewing of the world. Please don't be discouraged if you can't visualize the effects right away. I've observed that the greater majority may need fifteen to thirty minutes. Some people see the effect right away, others can spend a few days. If you can see the 3D effect in the images below, you will also be able to view hidden-image type stereogram. You may want to first read the About Stereograms page to get an idea of what you are about here. When you see that, your focus is about right to see the rest of the picture, and you can look up a bit.This page is intended to guide visitors that have never seen stereogramic effects and those viewers who may be a bit rusty. If so, you need to adjust your focus to join the middle two together so that, in the end you see a solid square and two flickering ones. When you get double vision, you may see two sets of box-pairs. Also, on this first one, I have put in two boxes to help you align yourself. If you tilt your head just a little bit, it won't work. One thing that is VERY IMPORTANT is that, when you try to "see" the stereogram, you keep your head level and eyes horizontal with the screen. It's a lot of fun to do this with people, staring beyond their heads, and seeing that they really do have four eyes (an affect of this double-vision staring). You see two fingers, right? That's what you're supposed to do with stereograms. ![]() You can get the idea of what you need to do by holding your pointer finger up about a foot or so from your face and stare through it to the wall. Unfortunately, beginners always seem to have a horrible time doing this (at least I did - couldn't see them for months!) So, there are a few techniques you can use. That is, you have to "unfocus" your eyes and stare off into space beyond the stereogram. To see stereograms, the user must not look at the paper or screen on which the stereogram lies, but look beyond it. A Couple Stereogram Examples and How To See Them ![]()
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