Free-Vision Fusion (Cross-eyed method) 7)8}8tY^{
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. k=/|?%
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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.
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Place the image in Figure 1 in the center of your screen. E3C[o! 5
Sit at your normal distance. 'C8=d(mR=m
Slowly cross your eyes. You will see a double image, or four dots. ~
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Continue to cross until the middle two images overlap. g"AfI
Adjust focus on middle image, keeping the two images overlapped. 0GR9C%"]
You should see the blue circle floating above the black circle.
