READ THIS if you don't understand A stereoscopic image consists of two images placed side by side, which can be viewed as a single true 3D image by focusing one eye on each image. Basically like those magic eye posters, except with normal pictures My images use cross-eye stereoscopy, so the left eye views the right image and the right eye the left image - hence, cross-eyed. It takes a bit of trial and error at first if you've never done it before, but the results are well worth it.
In Other Words just cross your eyes slightly so that the 2 images over lap perfectly into one, but you will sorta see 3 images but your eyes lock onto the the center one perfectly in and its in true 3D
I've made an animated gif file as visual demonstration