Free-Vision Fusion (Cross-eyed method) _:HQ4s@
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. ^1;Eq>u
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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 ^" "=Z
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Place the image in Figure 1 in the center of your screen. 0gH;y+\=*
Sit at your normal distance. ~2[mZias
Slowly cross your eyes. You will see a double image, or four dots. 0ni/!}YP_
Continue to cross until the middle two images overlap. Y?\PU{ O
Adjust focus on middle image, keeping the two images overlapped. B}^l'p_u
You should see the blue circle floating above the black circle.
