Free-Vision Fusion (Cross-eyed method) YT(N][V
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. mU5Ox4>&9
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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. qC`}vr|Z
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Place the image in Figure 1 in the center of your screen. D bGS] k<$
Sit at your normal distance. F#Lo
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Slowly cross your eyes. You will see a double image, or four dots. + O}Ik.w
Continue to cross until the middle two images overlap. JP#S/kJ%3
Adjust focus on middle image, keeping the two images overlapped. 0Lo8pe`DH
You should see the blue circle floating above the black circle.
