Free-Vision Fusion (Cross-eyed method) M?R!n$N_
This technique has the advantage of not requiring special viewing equipment. Fusion is the term used for the process for visually merging the left-eye image and the right-eye image into a single 3-dimensional image. When using a viewer, most of the work of achieving the needed abnormal convergence for stereo viewing is done by the optics and design of the stereo viewer. r," 7%1I
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Free-vision fusion requires patience and practice because your willpower and eyes must do the work of the stereo viewer. You must be able to focus where your eyes aren't looking. O:, =xIXR
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Place the image in Figure 1 in the center of your screen. ~b#OFnyG
Sit at your normal distance.
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Slowly cross your eyes. You will see a double image, or four dots. bs P6\'\4
Continue to cross until the middle two images overlap. o$t
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Adjust focus on middle image, keeping the two images overlapped. B\/ 7^{i5
You should see the blue circle floating above the black circle.
