Free-Vision Fusion (Cross-eyed method) aS?A3h4WM_
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. +`l >_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. <jXXj[M2
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Place the image in Figure 1 in the center of your screen. jdV E/5
Sit at your normal distance. 6s BS
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Slowly cross your eyes. You will see a double image, or four dots. ^2OBc
Continue to cross until the middle two images overlap. b Mi,z3z
Adjust focus on middle image, keeping the two images overlapped. C5#3c yf*B
You should see the blue circle floating above the black circle.
